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205 lines
108 KiB
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205 lines
108 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<class-scheme publication-date="2023-02-01" scheme-type="cpc" publication-type="official">
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<classification-item breakdown-code="false" not-allocatable="true" level="5" additional-only="false" sort-key="H01P" definition-exists="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>WAVEGUIDES</text></title-part><title-part><text>RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE </text><reference><text>operating at optical frequencies <class-ref scheme="cpc">G02B</class-ref></text></reference></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>In this subclass, the following expression is used with the meaning indicated : <subnote type="bullet"><note-paragraph>"waveguide type" as applied to transmission lines includes only high-frequency coaxial cables or Lecher lines, and as applied to resonators, delay lines, or other devices includes all devices having distributed inductance and capacitance.</note-paragraph></subnote></note-paragraph></note><note type="warning"><note-paragraph>In this subclass non-limiting references (in the sense of paragraph 39 of the Guide to the IPC) may still be displayed in the scheme.</note-paragraph></note></notes-and-warnings>
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<classification-item breakdown-code="false" not-allocatable="true" level="6" additional-only="false" sort-key="H01P1/00" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/00</classification-symbol>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P1/00" definition-exists="true" ipc-concordant="H01P1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Auxiliary devices </text><reference><text>coupling devices of the waveguide type <class-ref scheme="cpc">H01P5/00</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/005" definition-exists="true" ipc-concordant="H01P1/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Diode mounting means</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/02" definition-exists="true" ipc-concordant="H01P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Bends</text></title-part><title-part><text>Corners</text></title-part><title-part><text>Twists</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/022" definition-exists="true" ipc-concordant="H01P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in waveguides of polygonal cross-section </text><reference><text><class-ref scheme="cpc">H01P1/065</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/025" definition-exists="true" ipc-concordant="H01P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/025</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the E-plane</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/027" definition-exists="true" ipc-concordant="H01P1/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/027</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>in the H-plane</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/04" definition-exists="true" ipc-concordant="H01P1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/04</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Fixed joints</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/042" definition-exists="true" ipc-concordant="H01P1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/042</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hollow waveguide joints</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/045" definition-exists="true" ipc-concordant="H01P1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/045</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial joints</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/047" definition-exists="true" ipc-concordant="H01P1/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/047</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strip line joints</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/06" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Movable joints, e.g. rotating joints</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/061" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/061</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the relative movement being a translation along an axis common to at least two rectilinear parts, e.g. expansion joints</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/062" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/062</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the relative movement being a rotation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/063" definition-exists="false" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/063</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with a limited angle of rotation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/064" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/064</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the axis of rotation being perpendicular to the transmission path, e.g. hinge joint</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/065" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the axis of rotation being parallel to the transmission path, e.g. stepped twist</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/066" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/066</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with an unlimited angle of rotation</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/067" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/067</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the energy being transmitted in only one line located on the axis of rotation</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/068" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/068</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the energy being transmitted in at least one ring-shaped transmission line located around the axis of rotation, e.g. "around the mast" rotary joint </text><reference><text><class-ref scheme="cpc">H01P1/069</class-ref> takes precedence; coaxial line with solid inner conductor <class-ref scheme="cpc">H01P1/067</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/069" definition-exists="true" ipc-concordant="H01P1/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/069</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the energy being transmitted in at least one ring-shaped transmission line located around an axial transmission line; Concentric coaxial systems</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/08" definition-exists="true" ipc-concordant="H01P1/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/08</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Dielectric windows</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/10" definition-exists="true" ipc-concordant="H01P1/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for switching or interrupting </text><CPC-specific-text><reference><text>in systems using reflection or reradiation of radio, acoustic or other waves <class-ref scheme="cpc">G01S7/034</class-ref></text></reference></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/11" definition-exists="true" ipc-concordant="H01P1/11" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/11</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by ferromagnetic devices</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/12" definition-exists="true" ipc-concordant="H01P1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by mechanical chopper</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/122" definition-exists="true" ipc-concordant="H01P1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waveguide switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/125" definition-exists="true" ipc-concordant="H01P1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/125</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial switches</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/127" definition-exists="true" ipc-concordant="H01P1/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strip line switches</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/14" definition-exists="true" ipc-concordant="H01P1/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by electric discharge devices </text><reference><text>discharge devices <class-ref scheme="cpc">H01J17/64</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/15" definition-exists="true" ipc-concordant="H01P1/15" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/15</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>by semiconductor devices</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/16" definition-exists="true" ipc-concordant="H01P1/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/16</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>for mode selection, e.g. mode suppression or mode promotion</text></title-part><title-part><text>for mode conversion</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/161" definition-exists="true" ipc-concordant="H01P1/161" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/161</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>sustaining two independent orthogonal modes, e.g. orthomode transducer </text><CPC-specific-text><reference><text>combining or separating polarisations and frequencies <class-ref scheme="cpc">H01P1/2131</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/162" definition-exists="true" ipc-concordant="H01P1/162" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/162</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>absorbing spurious or unwanted modes of propagation</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/163" definition-exists="false" ipc-concordant="H01P1/163" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2015-12-01" status="published"><classification-symbol>H01P1/163</classification-symbol><class-title date-revised="2015-12-01"><title-part><text>specifically adapted for selection or promotion of the TE<sub>01</sub> circular-electric mode</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/165" definition-exists="true" ipc-concordant="H01P1/165" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for rotating the plane of polarisation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/17" definition-exists="true" ipc-concordant="H01P1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/17</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for producing a continuously rotating polarisation, e.g. circular polarisation</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/171" definition-exists="true" ipc-concordant="H01P1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/171</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a corrugated or ridged waveguide section</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/172" definition-exists="true" ipc-concordant="H01P1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/172</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a dielectric element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/173" definition-exists="true" ipc-concordant="H01P1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/173</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a conductive element</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/174" definition-exists="true" ipc-concordant="H01P1/17" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/174</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using a magnetic element </text><reference><text><class-ref scheme="cpc">H01P1/175</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/175" definition-exists="true" ipc-concordant="H01P1/175" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/175</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Faraday rotators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/18" definition-exists="true" ipc-concordant="H01P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/18</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Phase-shifters </text><reference><text><class-ref scheme="cpc">H01P1/165</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/181" definition-exists="true" ipc-concordant="H01P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using ferroelectric devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/182" definition-exists="true" ipc-concordant="H01P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waveguide phase-shifters </text><reference><text><class-ref scheme="cpc">H01P1/181</class-ref>, <class-ref scheme="cpc">H01P1/185</class-ref>, <class-ref scheme="cpc">H01P1/19</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/183" definition-exists="true" ipc-concordant="H01P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial phase-shifters </text><reference><text><class-ref scheme="cpc">H01P1/181</class-ref>, <class-ref scheme="cpc">H01P1/185</class-ref>, <class-ref scheme="cpc">H01P1/19</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/184" definition-exists="true" ipc-concordant="H01P1/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strip line phase-shifters </text><reference><text><class-ref scheme="cpc">H01P1/181</class-ref>, <class-ref scheme="cpc">H01P1/185</class-ref>, <class-ref scheme="cpc">H01P1/19</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/185" definition-exists="true" ipc-concordant="H01P1/185" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a diode or a gas filled discharge tube</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/19" definition-exists="true" ipc-concordant="H01P1/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using a ferromagnetic device</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/195" definition-exists="true" ipc-concordant="H01P1/195" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/195</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>having a toroidal shape</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/20" definition-exists="true" ipc-concordant="H01P1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/20</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Frequency-selective devices, e.g. filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/2002" definition-exists="true" ipc-concordant="H01P1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dielectric waveguide filters </text><reference><text><class-ref scheme="cpc">H01P1/212</class-ref>, <class-ref scheme="cpc">H01P1/213</class-ref>, <class-ref scheme="cpc">H01P1/215</class-ref>, <class-ref scheme="cpc">H01P1/219</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/2005" definition-exists="true" ipc-concordant="H01P1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/2007" definition-exists="true" ipc-concordant="H01P1/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Filtering devices for biasing networks or DC returns</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/201" definition-exists="true" ipc-concordant="H01P1/201" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/201</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Filters for transverse electromagnetic waves </text><reference><text><class-ref scheme="cpc">H01P1/212</class-ref>, <class-ref scheme="cpc">H01P1/213</class-ref>, <class-ref scheme="cpc">H01P1/215</class-ref>, <class-ref scheme="cpc">H01P1/219</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2013" definition-exists="true" ipc-concordant="H01P1/201" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2013</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coplanar line filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2016" definition-exists="true" ipc-concordant="H01P1/201" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2016</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Slot line filters; Fin line filters</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/202" definition-exists="true" ipc-concordant="H01P1/202" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/202</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coaxial filters </text><reference><text>cascaded coaxial cavities <class-ref scheme="cpc">H01P1/205</class-ref></text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/203" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/203</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Strip line filters</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/20309" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20309</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with dielectric resonator</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P1/20318" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20318</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with dielectric resonators as non-metallised opposite openings in the metallised surfaces of a substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/20327" definition-exists="false" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20327</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Electromagnetic interstage coupling</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P1/20336" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20336</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb or interdigital filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01P1/20345" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20345</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer filters</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P1/20354" definition-exists="false" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20354</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-comb or non-interdigital filters</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01P1/20363" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20363</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Linear resonators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01P1/20372" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20372</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Hairpin resonators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01P1/20381" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/20381</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Special shape resonators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2039" definition-exists="true" ipc-concordant="H01P1/203" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2039</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Galvanic coupling between Input/Output</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/205" definition-exists="false" ipc-concordant="H01P1/205" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/205</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Comb or interdigital filters</text></title-part><title-part><text>Cascaded coaxial cavities </text><reference><text><class-ref scheme="cpc">H01P1/203</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2053" definition-exists="true" ipc-concordant="H01P1/205" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2053</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the coaxial cavity resonators being disposed parall to each other</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2056" definition-exists="true" ipc-concordant="H01P1/205" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2056</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Comb filters or interdigital filters with metallised resonator holes in a dielectric block</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/207" definition-exists="true" ipc-concordant="H01P1/207" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/207</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow waveguide filters </text><reference><text><class-ref scheme="cpc">H01P1/212</class-ref>, <class-ref scheme="cpc">H01P1/213</class-ref>, <class-ref scheme="cpc">H01P1/215</class-ref>, <class-ref scheme="cpc">H01P1/219</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/208" definition-exists="false" ipc-concordant="H01P1/208" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/208</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cascaded cavities</text></title-part><title-part><text>Cascaded resonators inside a hollow waveguide structure </text><reference><text><class-ref scheme="cpc">H01P1/205</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2082" definition-exists="true" ipc-concordant="H01P1/208" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with multimode resonators </text><reference><text><class-ref scheme="cpc">H01P1/2086</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2084" definition-exists="true" ipc-concordant="H01P1/208" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with dielectric resonators</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P1/2086" definition-exists="true" ipc-concordant="H01P1/208" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>multimode</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/2088" definition-exists="true" ipc-concordant="H01P1/208" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Integrated in a substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/209" definition-exists="true" ipc-concordant="H01P1/209" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/209</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>comprising one or more branching arms or cavities wholly outside the main waveguide</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/211" definition-exists="true" ipc-concordant="H01P1/211" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/211</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Waffle-iron filters</text></title-part><title-part><text>Corrugated structures</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/212" definition-exists="false" ipc-concordant="H01P1/212" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/212</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>suppressing or attenuating harmonic frequencies </text><reference><text><class-ref scheme="cpc">H01P1/215</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/213" definition-exists="true" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/213</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>combining or separating two or more different frequencies </text><reference><text><class-ref scheme="cpc">H01P1/215</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2131" definition-exists="false" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2131</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>with combining or separating polarisations</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2133" definition-exists="true" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2133</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using coaxial filters </text><reference><text><class-ref scheme="cpc">H01P1/2131</class-ref>, <class-ref scheme="cpc">H01P1/2136</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2135" definition-exists="true" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2135</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using strip line filters </text><reference><text><class-ref scheme="cpc">H01P1/2131</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2136" definition-exists="true" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2136</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using comb or interdigital filters; using cascaded coaxial cavities </text><reference><text><class-ref scheme="cpc">H01P1/2131</class-ref>, <class-ref scheme="cpc">H01P1/2135</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/2138" definition-exists="true" ipc-concordant="H01P1/213" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/2138</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>using hollow waveguide filters </text><reference><text><class-ref scheme="cpc">H01P1/2131</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/215" definition-exists="false" ipc-concordant="H01P1/215" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/215</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferromagnetic material</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/217" definition-exists="false" ipc-concordant="H01P1/217" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/217</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the ferromagnetic material acting as a tuning element in resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/218" definition-exists="true" ipc-concordant="H01P1/218" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/218</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>the ferromagnetic material acting as a frequency selective coupling element, e.g. YIG-filters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/219" definition-exists="true" ipc-concordant="H01P1/219" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/219</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Evanescent mode filters</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/22" definition-exists="true" ipc-concordant="H01P1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Attenuating devices </text><reference><text>dissipative terminating devices <class-ref scheme="cpc">H01P1/26</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/222" definition-exists="true" ipc-concordant="H01P1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waveguide attenuators </text><reference><text><class-ref scheme="cpc">H01P1/23</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/225" definition-exists="true" ipc-concordant="H01P1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial attenuators </text><reference><text><class-ref scheme="cpc">H01P1/23</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/227" definition-exists="true" ipc-concordant="H01P1/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strip line attenuators </text><reference><text><class-ref scheme="cpc">H01P1/23</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/23" definition-exists="false" ipc-concordant="H01P1/23" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/23</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using ferromagnetic material</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/24" definition-exists="true" ipc-concordant="H01P1/24" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/24</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Terminating devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/26" definition-exists="false" ipc-concordant="H01P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/26</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dissipative terminations</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/262" definition-exists="false" ipc-concordant="H01P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/262</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the dissipative medium being a liquid or being cooled by a liquid</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/264" definition-exists="true" ipc-concordant="H01P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/264</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Waveguide terminations </text><reference><text><class-ref scheme="cpc">H01P1/262</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/266" definition-exists="false" ipc-concordant="H01P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/266</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial terminations </text><reference><text><class-ref scheme="cpc">H01P1/262</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/268" definition-exists="false" ipc-concordant="H01P1/26" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/268</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Strip line terminations </text><reference><text><class-ref scheme="cpc">H01P1/262</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/28" definition-exists="true" ipc-concordant="H01P1/28" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P1/28</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Short-circuiting plungers</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/30" definition-exists="true" ipc-concordant="H01P1/30" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01P1/30</classification-symbol><class-title date-revised="2017-08-01"><title-part><text>for compensation of, or protection against, temperature or moisture effects </text><CPC-specific-text><text>; for improving power handling capability </text><reference><text><class-ref scheme="cpc">H01P1/04</class-ref>, <class-ref scheme="cpc">H01P1/08</class-ref> take precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P1/32" definition-exists="false" ipc-concordant="H01P1/32" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2016-05-01" status="published"><classification-symbol>H01P1/32</classification-symbol><class-title date-revised="2016-05-01"><title-part><text>Non-reciprocal transmission devices </text><reference><text><class-ref scheme="cpc">H01P1/02</class-ref> - <class-ref scheme="cpc">H01P1/30</class-ref> take precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/36" definition-exists="true" ipc-concordant="H01P1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/36</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Isolators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/362" definition-exists="true" ipc-concordant="H01P1/36" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/362</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Edge-guided mode devices</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/365" definition-exists="true" ipc-concordant="H01P1/365" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/365</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Resonance absorption isolators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/37" definition-exists="true" ipc-concordant="H01P1/37" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/37</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Field displacement isolators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/375" definition-exists="false" ipc-concordant="H01P1/375" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/375</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Faraday rotators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P1/38" definition-exists="true" ipc-concordant="H01P1/38" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/38</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Circulators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/383" definition-exists="true" ipc-concordant="H01P1/383" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/383</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Junction circulators, e.g. Y-circulators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/387" definition-exists="true" ipc-concordant="H01P1/387" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/387</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Strip line circulators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P1/39" definition-exists="true" ipc-concordant="H01P1/39" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/39</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow waveguide circulators</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/393" definition-exists="true" ipc-concordant="H01P1/393" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/393</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using Faraday rotators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P1/397" definition-exists="false" ipc-concordant="H01P1/397" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P1/397</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>using non- reciprocal phase shifters </text><reference><text><class-ref scheme="cpc">H01P1/393</class-ref> takes precedence</text></reference></title-part></class-title></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P3/00" definition-exists="true" ipc-concordant="H01P3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/00</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Waveguides</text></title-part><title-part><text>Transmission lines of the waveguide type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/003" definition-exists="true" ipc-concordant="H01P3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coplanar lines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/006" definition-exists="true" ipc-concordant="H01P3/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Conductor backed coplanar waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/02" definition-exists="false" ipc-concordant="H01P3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with two longitudinal conductors</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/023" definition-exists="true" ipc-concordant="H01P3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/023</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Fin lines; Slot lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/026" definition-exists="true" ipc-concordant="H01P3/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coplanar striplines [CPS]</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/04" definition-exists="true" ipc-concordant="H01P3/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lines formed as Lecher wire pairs</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/06" definition-exists="true" ipc-concordant="H01P3/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P3/06</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Coaxial lines</text></title-part></class-title><notes-and-warnings date-revised="2013-01-01"><note type="note"><note-paragraph>This subgroup is only used for documents disclosing typical HF-features of coaxial cables, e.g. propagation of non-TEM-modes, multimoding, oversized coaxial cables, particular cross-section adapted for HF-propagation</note-paragraph></note></notes-and-warnings></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/08" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Microstrips</text></title-part><title-part><text>Strip lines</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P3/081" definition-exists="false" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01P3/081</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Microstriplines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P3/082" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multilayer dielectric</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P3/084" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2017-08-01" status="published"><classification-symbol>H01P3/084</classification-symbol><class-title date-revised="2017-08-01"><title-part><CPC-specific-text><text>Suspended microstriplines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P3/085" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Triplate lines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P3/087" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Suspended triplate lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P3/088" definition-exists="true" ipc-concordant="H01P3/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Stacked transmission lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/10" definition-exists="false" ipc-concordant="H01P3/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Wire waveguides, i.e. with a single solid longitudinal conductor</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/12" definition-exists="false" ipc-concordant="H01P3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow waveguides </text><reference><text><class-ref scheme="cpc">H01P3/20</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/121" definition-exists="true" ipc-concordant="H01P3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/121</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>integrated in a substrate</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/122" definition-exists="false" ipc-concordant="H01P3/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/122</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Dielectric loaded (not air)</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/123" definition-exists="true" ipc-concordant="H01P3/123" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/123</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a complex or stepped cross-section, e.g. ridged or grooved waveguides </text><reference><text><class-ref scheme="cpc">H01P3/14</class-ref> takes precedence</text></reference></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/127" definition-exists="false" ipc-concordant="H01P3/127" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/127</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with a circular, elliptic, or parabolic cross-section</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/13" definition-exists="true" ipc-concordant="H01P3/13" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/13</classification-symbol><class-title date-revised="2015-12-01"><title-part><text>specially adapted for transmission of the TE<sub>01</sub> circular-electric mode </text><CPC-specific-text><reference><text>selection, promotion <class-ref scheme="cpc">H01P1/163</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/14" definition-exists="false" ipc-concordant="H01P3/14" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/14</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>flexible</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/16" definition-exists="true" ipc-concordant="H01P3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dielectric waveguides, i.e. without a longitudinal conductor</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P3/165" definition-exists="true" ipc-concordant="H01P3/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/165</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Non-radiating dielectric waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/18" definition-exists="false" ipc-concordant="H01P3/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P3/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>built-up from several layers to increase operating surface, i.e. alternately conductive and dielectric layers</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P3/20" definition-exists="false" ipc-concordant="H01P3/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2018-05-01" status="published"><classification-symbol>H01P3/20</classification-symbol><class-title date-revised="2018-05-01"><title-part><text>Quasi-optical arrangements for guiding a wave, e.g. focusing by dielectric lenses</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P5/00" definition-exists="true" ipc-concordant="H01P5/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P5/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Coupling devices of the waveguide type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P5/02" definition-exists="false" ipc-concordant="H01P5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with invariable factor of coupling </text><reference><text><class-ref scheme="cpc">H01P5/12</class-ref> takes precedence </text><CPC-specific-text><text>choke joints <class-ref scheme="cpc">H01P1/04</class-ref>, <class-ref scheme="cpc">H01P1/06</class-ref></text></CPC-specific-text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/022" definition-exists="false" ipc-concordant="H01P5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transitions between lines of the same kind and shape, but with different dimensions</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/024" definition-exists="false" ipc-concordant="H01P5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/024</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between hollow waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/026" definition-exists="false" ipc-concordant="H01P5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/026</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between coaxial lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/028" definition-exists="false" ipc-concordant="H01P5/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/028</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>between strip lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P5/04" definition-exists="true" ipc-concordant="H01P5/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>with variable factor of coupling</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P5/08" definition-exists="false" ipc-concordant="H01P5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for linking dissimilar lines or devices </text><reference><text><class-ref scheme="cpc">H01P1/16</class-ref>, <class-ref scheme="cpc">H01P5/04</class-ref> take precedence; linking lines of the same kind but with different dimensions <class-ref scheme="cpc">H01P5/02</class-ref></text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/082" definition-exists="true" ipc-concordant="H01P5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transitions between hollow waveguides of different shape, e.g. between a rectangular and a circular waveguide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/085" definition-exists="true" ipc-concordant="H01P5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/085</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coaxial-line/strip-line transitions</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/087" definition-exists="false" ipc-concordant="H01P5/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/087</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transitions to a dielectric waveguide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/10" definition-exists="true" ipc-concordant="H01P5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>for coupling balanced with unbalanced lines or devices</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/1007" definition-exists="false" ipc-concordant="H01P5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/1007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microstrip transitions to Slotline or finline</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/1015" definition-exists="false" ipc-concordant="H01P5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/1015</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coplanar line transitions to Slotline or finline</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/1022" definition-exists="false" ipc-concordant="H01P5/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/1022</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Transitions to dielectric waveguide</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/103" definition-exists="false" ipc-concordant="H01P5/103" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/103</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow-waveguide/coaxial-line transitions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/107" definition-exists="true" ipc-concordant="H01P5/107" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/107</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hollow-waveguide/strip-line transitions</text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P5/12" definition-exists="false" ipc-concordant="H01P5/12" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/12</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coupling devices having more than two ports </text><reference><text><class-ref scheme="cpc">H01P5/04</class-ref> takes precedence</text></reference></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P5/16" definition-exists="true" ipc-concordant="H01P5/16" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/16</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Conjugate devices, i.e. devices having at least one port decoupled from one other port</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/18" definition-exists="true" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/18</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>consisting of two coupled guides, e.g. directional couplers</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/181" definition-exists="false" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/181</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the guides being hollow waveguides</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/182" definition-exists="false" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/182</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the waveguides being arranged in parallel</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/183" definition-exists="false" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/183</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>at least one of the guides being a coaxial line</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/184" definition-exists="true" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/184</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the guides being strip lines or microstrips</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/185" definition-exists="true" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/185</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Edge coupled lines</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="13" additional-only="false" sort-key="H01P5/186" definition-exists="true" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/186</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Lange couplers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/187" definition-exists="true" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/187</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Broadside coupled lines</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/188" definition-exists="false" ipc-concordant="H01P5/18" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/188</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>the guides being dielectric waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="10" additional-only="false" sort-key="H01P5/19" definition-exists="false" ipc-concordant="H01P5/19" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/19</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>of the junction type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/20" definition-exists="true" ipc-concordant="H01P5/20" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/20</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Magic-T junctions</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="11" additional-only="false" sort-key="H01P5/22" definition-exists="false" ipc-concordant="H01P5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/22</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Hybrid ring junctions</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/222" definition-exists="true" ipc-concordant="H01P5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/222</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>180° rat race hybrid rings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/225" definition-exists="true" ipc-concordant="H01P5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/225</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>180° reversed phase hybrid rings</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="12" additional-only="false" sort-key="H01P5/227" definition-exists="true" ipc-concordant="H01P5/22" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P5/227</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>90° branch line couplers</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P7/00" definition-exists="true" ipc-concordant="H01P7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P7/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Resonators of the waveguide type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/005" definition-exists="false" ipc-concordant="H01P7/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Helical resonators; Spiral resonators</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/02" definition-exists="false" ipc-concordant="H01P7/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Lecher resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/04" definition-exists="false" ipc-concordant="H01P7/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Coaxial resonators</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/06" definition-exists="true" ipc-concordant="H01P7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/06</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Cavity resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/065" definition-exists="true" ipc-concordant="H01P7/06" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/065</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>integrated in a substrate</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/08" definition-exists="false" ipc-concordant="H01P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/08</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Strip line resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/082" definition-exists="true" ipc-concordant="H01P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/082</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Microstripline resonators </text><reference><text><class-ref scheme="cpc">H01P7/088</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/084" definition-exists="true" ipc-concordant="H01P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/084</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Triplate line resonators </text><reference><text><class-ref scheme="cpc">H01P7/088</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/086" definition-exists="true" ipc-concordant="H01P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/086</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Coplanar waveguide resonators </text><reference><text><class-ref scheme="cpc">H01P7/088</class-ref> takes precedence</text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/088" definition-exists="true" ipc-concordant="H01P7/08" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/088</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Tunable resonators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P7/10" definition-exists="true" ipc-concordant="H01P7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/10</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Dielectric resonators</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P7/105" definition-exists="false" ipc-concordant="H01P7/10" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P7/105</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Multimode resonators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P9/00" definition-exists="true" ipc-concordant="H01P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P9/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Delay lines of the waveguide type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P9/003" definition-exists="false" ipc-concordant="H01P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P9/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Delay equalizers</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P9/006" definition-exists="false" ipc-concordant="H01P9/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P9/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Meander lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P9/02" definition-exists="false" ipc-concordant="H01P9/02" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P9/02</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Helical lines</text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P9/04" definition-exists="false" ipc-concordant="H01P9/04" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P9/04</classification-symbol><class-title date-revised="2013-01-01"><title-part><text>Interdigital lines</text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="7" additional-only="false" sort-key="H01P11/00" definition-exists="true" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2021-01-01" status="published"><classification-symbol>H01P11/00</classification-symbol><class-title date-revised="2021-01-01"><title-part><text>Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type</text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P11/001" definition-exists="true" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/001</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing waveguides or transmission lines of the waveguide type</text></CPC-specific-text></title-part></class-title>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P11/002" definition-exists="true" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/002</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing hollow waveguides</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P11/003" definition-exists="true" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/003</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing lines with conductors on a substrate, e.g. strip lines, slot lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P11/005" definition-exists="false" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/005</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing coaxial lines</text></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="9" additional-only="false" sort-key="H01P11/006" definition-exists="false" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/006</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing dielectric waveguides</text></CPC-specific-text></title-part></class-title></classification-item></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P11/007" definition-exists="false" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/007</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing frequency-selective devices </text><reference><text>resonators <class-ref scheme="cpc">H01P11/008</class-ref></text></reference></CPC-specific-text></title-part></class-title></classification-item>
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<classification-item breakdown-code="false" not-allocatable="false" level="8" additional-only="false" sort-key="H01P11/008" definition-exists="false" ipc-concordant="H01P11/00" c-set-base-allowed="false" c-set-subsequent-allowed="true" date-revised="2013-01-01" status="published"><classification-symbol>H01P11/008</classification-symbol><class-title date-revised="2013-01-01"><title-part><CPC-specific-text><text>Manufacturing resonators</text></CPC-specific-text></title-part></class-title></classification-item></classification-item></classification-item></classification-item></class-scheme> |