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H01Q 1/00
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ANTENNAS, i.e. RADIO AERIALS - Details of, or arrangements associated with, antennas |
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H01Q 1/02
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Arrangements for de-icing; Arrangements for drying-out |
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H01Q 1/04
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Adaptation for subterranean or subaqueous use |
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H01Q 1/06
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Means for the lighting or illuminating of antennas, e.g. for purpose of warning |
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H01Q 1/08
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Means for collapsing antennas or parts thereof |
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H01Q 1/10
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Telescopic elements |
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H01Q 1/12
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Supports; Mounting means |
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H01Q 1/14
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Supports; Mounting means for wire or other non-rigid radiating elements |
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H01Q 1/16
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Strainers, spreaders, or spacers |
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H01Q 1/18
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Means for stabilising antennas on an unstable platform |
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H01Q 1/20
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Resilient mountings |
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H01Q 1/22
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Supports; Mounting means by structural association with other equipment or articles |
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H01Q 1/24
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Supports; Mounting means by structural association with other equipment or articles with receiving set |
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H01Q 1/26
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Supports; Mounting means by structural association with other equipment or articles with electric discharge tube |
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H01Q 1/27
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Adaptation for use in or on movable bodies |
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H01Q 1/28
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Adaptation for use in or on aircraft, missiles, satellites, or balloons |
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H01Q 1/30
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Means for trailing antennas |
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H01Q 1/32
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Adaptation for use in or on road or rail vehicles |
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H01Q 1/34
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Adaptation for use in or on ships, submarines, buoys or torpedoes |
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H01Q 1/36
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Structural form of radiating elements, e.g. cone, spiral, umbrella |
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H01Q 1/38
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Structural form of radiating elements, e.g. cone, spiral, umbrella formed by a conductive layer on an insulating support |
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H01Q 1/40
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Radiating elements coated with, or embedded in, protective material |
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H01Q 1/42
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Housings not intimately mechanically associated with radiating elements, e.g. radome |
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H01Q 1/44
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ANTENNAS, i.e. RADIO AERIALS - Details of, or arrangements associated with, antennas using equipment having another main function to serve additionally as an antenna |
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H01Q 1/46
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Electric supply lines or communication lines |
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H01Q 1/48
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Earthing means; Earth screens; Counterpoises |
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H01Q 1/50
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Structural association of antennas with earthing switches, lead-in devices or lightning protectors |
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H01Q 1/52
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Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure |
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H01Q 3/00
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system |
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H01Q 3/01
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the shape of the antenna or antenna system |
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H01Q 3/02
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole |
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H01Q 3/04
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation |
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H01Q 3/06
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying one co-ordinate of the orientation over a restricted angle |
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H01Q 3/08
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation |
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H01Q 3/10
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical movement of antenna or antenna system as a whole for varying two co-ordinates of the orientation to produce a conical or spiral scan |
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H01Q 3/12
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems |
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H01Q 3/14
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device |
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H01Q 3/16
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device |
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H01Q 3/18
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is movable and the reflecting device is fixed |
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H01Q 3/20
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying relative position of primary active element and a reflecting device wherein the primary active element is fixed and the reflecting device is movable |
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H01Q 3/22
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation in accordance with variation of frequency of radiated wave |
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H01Q 3/24
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the orientation by switching energy from one active radiating element to another, e.g. for beam switching |
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H01Q 3/26
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture |
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H01Q 3/28
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the amplitude |
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H01Q 3/30
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase |
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H01Q 3/32
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by mechanical means |
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H01Q 3/34
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means |
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H01Q 3/36
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters |
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H01Q 3/38
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with variable phase-shifters the phase-shifters being digital |
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H01Q 3/40
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means with phasing matrix |
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H01Q 3/42
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the distribution of energy across a radiating aperture varying the phase by electrical means using frequency-mixing |
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H01Q 3/44
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Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element |
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H01Q 3/46
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Active lenses or reflecting arrays |
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H01Q 5/00
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Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements |
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H01Q 5/01
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Resonant aerials |
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H01Q 5/02
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for operation of centre-fed aerials which comprise a single, or two or more collinear, substantially straight elongated active elements |
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H01Q 5/10
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Resonant antennas |
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H01Q 5/15
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Resonant antennas for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements |
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H01Q 5/20
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Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands |
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H01Q 5/22
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RF wavebands combined with non-RF wavebands, e.g. infrared or optical |
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H01Q 5/25
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Ultra-wideband [UWB] systems, e.g. multiple resonance systems; Pulse systems |
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H01Q 5/28
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Arrangements for establishing polarisation or beam width over two or more different wavebands |
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H01Q 5/30
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Arrangements for providing operation on different wavebands |
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H01Q 5/35
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Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using two or more simultaneously fed points |
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H01Q 5/40
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Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements |
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H01Q 5/42
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Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more imbricated arrays |
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H01Q 5/45
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Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device |
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H01Q 5/47
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Imbricated or interleaved structures; Combined or electromagnetically coupled arrangements, e.g. comprising two or more non-connected fed radiating elements using two or more feeds in association with a common reflecting, diffracting or refracting device with a coaxial arrangement of the feeds |
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H01Q 5/48
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Combinations of two or more dipole type antennas |
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H01Q 5/49
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Combinations of two or more dipole type antennas with parasitic elements used for purposes other than for dual-band or multi-band, e.g. imbricated Yagi antennas |
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H01Q 5/50
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Feeding or matching arrangements for broad-band or multi-band operation |
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H01Q 5/55
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Feeding or matching arrangements for broad-band or multi-band operation for horn or waveguide antennas |
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H01Q 5/307
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Individual or coupled radiating elements, each element being fed in an unspecified way |
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H01Q 5/314
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Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors |
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H01Q 5/321
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Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements |
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H01Q 5/328
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Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors between a radiating element and ground |
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H01Q 5/335
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Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching |
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H01Q 5/342
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Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes |
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H01Q 5/357
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Individual or coupled radiating elements, each element being fed in an unspecified way for different propagation modes using a single feed point |
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H01Q 5/364
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Creating multiple current paths |
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H01Q 5/371
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Branching current paths |
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H01Q 5/378
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Combination of fed elements with parasitic elements |
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H01Q 5/385
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Two or more parasitic elements |
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H01Q 5/392
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Combination of fed elements with parasitic elements the parasitic elements having dual-band or multi-band characteristics |
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H01Q 7/00
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Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop |
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H01Q 7/02
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Collapsible antennas; Retractable antennas |
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H01Q 7/04
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Screened antennas |
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H01Q 7/06
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Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material |
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H01Q 7/08
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Ferrite rod or like elongated core |
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H01Q 9/00
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Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements |
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H01Q 9/02
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Non-resonant antennas |
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H01Q 9/04
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Resonant antennas |
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H01Q 9/06
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Resonant antennas - Details |
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H01Q 9/08
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Junction boxes specially adapted for supporting adjacent ends of collinear rigid elements |
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H01Q 9/10
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Junction boxes specially adapted for supporting adjacent ends of divergent elements |
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H01Q 9/12
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Junction boxes specially adapted for supporting adjacent ends of divergent elements adapted for adjustment of angle between elements |
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H01Q 9/14
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Length of element or elements adjustable |
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H01Q 9/16
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Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole |
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H01Q 9/18
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Vertical disposition of the antenna |
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H01Q 9/20
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Two collinear substantially straight active elements; Substantially straight single active elements |
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H01Q 9/22
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Rigid rod or equivalent tubular element or elements |
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H01Q 9/24
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Shunt feed arrangements to single active elements, e.g. for delta matching |
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H01Q 9/26
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Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength |
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H01Q 9/27
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Spiral antennas |
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H01Q 9/28
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Conical, cylindrical, cage, strip, gauze or like elements having an extended radiating surface; Elements comprising two conical surfaces having collinear axes and adjacent apices and fed by two-conductor transmission lines |
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H01Q 9/30
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Resonant antennas with feed to end of elongated active element, e.g. unipole |
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H01Q 9/32
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Vertical arrangement of element |
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H01Q 9/34
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Mast, tower, or like self-supporting or stay-supported antennas |
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H01Q 9/36
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Vertical arrangement of element with top loading |
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H01Q 9/38
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Vertical arrangement of element with counterpoise |
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H01Q 9/40
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Element having extended radiating surface |
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H01Q 9/42
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Resonant antennas with feed to end of elongated active element, e.g. unipole with folded element, the folded parts being spaced apart a small fraction of the operating wavelength |
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H01Q 9/43
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Scimitar antennas |
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H01Q 9/44
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Resonant antennas with a plurality of elements having mutually inclined substantially straight portions |
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H01Q 9/46
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Resonant antennas with a plurality of elements having mutually inclined substantially straight portions with rigid elements diverging from single point |
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H01Q 11/00
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Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements |
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H01Q 11/02
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Non-resonant antennas, e.g. travelling-wave antenna |
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H01Q 11/04
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Non-resonant antennas, e.g. travelling-wave antenna with parts bent, folded, shaped, screened or electrically loaded to obtain desired phase relation of radiation from selected sections of the antenna |
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H01Q 11/06
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Rhombic antennas; V-antennas |
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H01Q 11/08
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Helical antennas |
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H01Q 11/10
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Log-periodic antennas |
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H01Q 11/12
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Resonant antennas |
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H01Q 11/14
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Resonant antennas with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effects |
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H01Q 11/16
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Resonant antennas with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effects in which the selected sections are collinear |
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H01Q 11/18
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Resonant antennas with parts bent, folded, shaped or screened or with phasing impedances, to obtain desired phase relation of radiation from selected sections of the antenna or to obtain desired polarisation effects in which the selected sections are parallelly spaced |
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H01Q 11/20
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V-antennas |
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H01Q 13/00
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Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave |
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H01Q 13/02
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Waveguide horns |
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H01Q 13/04
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Biconical horns |
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H01Q 13/06
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Waveguide mouths |
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H01Q 13/08
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Radiating ends of two-conductor microwave transmission lines, e.g. of coaxial lines, of microstrip lines |
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H01Q 13/10
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Resonant slot antennas |
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H01Q 13/12
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Longitudinally slotted cylinder antennas; Equivalent structures |
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H01Q 13/14
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Skeleton cylinder antennas |
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H01Q 13/16
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Folded slot antennas |
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H01Q 13/18
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Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity |
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H01Q 13/20
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Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave |
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H01Q 13/22
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Longitudinal slot in boundary wall of waveguide or transmission line |
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H01Q 13/24
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Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave constituted by a dielectric or ferromagnetic rod or pipe |
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H01Q 13/26
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Surface waveguide constituted by a single conductor, e.g. strip conductor |
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H01Q 13/28
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Non-resonant leaky-waveguide or transmission-line antennas; Equivalent structures causing radiation along the transmission path of a guided wave comprising elements constituting electric discontinuities and spaced in direction of wave propagation, e.g. dielectric elements or conductive elements forming artificial dielectric |
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H01Q 15/00
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Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices |
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H01Q 15/02
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Refracting or diffracting devices, e.g. lens, prism |
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H01Q 15/04
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Refracting or diffracting devices, e.g. lens, prism comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens |
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H01Q 15/06
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Refracting or diffracting devices, e.g. lens, prism comprising plurality of wave-guiding channels of different length |
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H01Q 15/08
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Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material |
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H01Q 15/10
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Refracting or diffracting devices, e.g. lens, prism comprising three-dimensional array of impedance discontinuities, e.g. holes in conductive surfaces or conductive discs forming artificial dielectric |
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H01Q 15/12
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Refracting or diffracting devices, e.g. lens, prism functioning also as polarisation filter |
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H01Q 15/14
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Reflecting surfaces; Equivalent structures |
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H01Q 15/16
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Reflecting surfaces; Equivalent structures curved in two dimensions, e.g. paraboloidal |
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H01Q 15/18
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Reflecting surfaces; Equivalent structures comprising plurality of mutually inclined plane surfaces, e.g. corner reflector |
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H01Q 15/20
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Collapsible reflectors |
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H01Q 15/22
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Reflecting surfaces; Equivalent structures functioning also as polarisation filter |
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H01Q 15/23
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Combinations of reflecting surfaces with refracting or diffracting devices |
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H01Q 15/24
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Polarising devices; Polarisation filters |
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H01Q 17/00
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Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems |
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H01Q 19/00
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic |
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H01Q 19/02
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic - Details |
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H01Q 19/04
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Means for collapsing H-antennas or Yagi antennas |
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H01Q 19/06
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens |
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H01Q 19/08
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for modifying the radiation pattern of a radiating horn in which it is located |
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H01Q 19/09
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens wherein the primary active element is coated with or embedded in a dielectric or magnetic material |
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H01Q 19/10
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Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces |
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H01Q 19/12
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave |
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H01Q 19/13
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a single radiating element, e.g. a dipole, a slot, a waveguide termination |
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H01Q 19/15
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source being a line source, e.g. leaky waveguide antennas |
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H01Q 19/17
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces wherein the surfaces are concave the primary radiating source comprising two or more radiating elements |
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H01Q 19/18
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces |
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H01Q 19/19
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface |
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H01Q 19/20
|
Producing pencil beam by two cylindrical focusing devices with their focal lines orthogonally disposed |
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H01Q 19/22
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element |
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H01Q 19/24
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being centre-fed and substantially straight, e.g. H-antenna |
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H01Q 19/26
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of a single substantially straight conductive element the primary active element being end-fed and elongated |
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H01Q 19/28
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements |
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H01Q 19/30
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being centre-fed and substantially straight, e.g. Yagi antenna |
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H01Q 19/32
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using a secondary device in the form of two or more substantially straight conductive elements the primary active element being end-fed and elongated |
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H01Q 19/185
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces wherein the surfaces are plane |
|
H01Q 19/195
|
Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein a reflecting surface acts also as a polarisation filter or a polarising device |
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H01Q 21/00
|
Antenna arrays or systems |
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H01Q 21/06
|
Arrays of individually energised antenna units similarly polarised and spaced apart |
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H01Q 21/08
|
Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a rectilinear path |
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H01Q 21/10
|
Collinear arrangements of substantially straight elongated conductive units |
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H01Q 21/12
|
Parallel arrangements of substantially straight elongated conductive units |
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H01Q 21/14
|
Adcock antennas |
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H01Q 21/16
|
U-type |
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H01Q 21/18
|
H-type |
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H01Q 21/20
|
Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along, or adjacent to, a curvilinear path |
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H01Q 21/22
|
Antenna units of the array energised non-uniformly in amplitude or phase, e.g. tapered array or binomial array |
|
H01Q 21/24
|
Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction |
|
H01Q 21/26
|
Turnstile or like antennas comprising arrangements of three or more elongated elements disposed radially and symmetrically in a horizontal plane about a common centre |
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H01Q 21/28
|
Combinations of substantially independent non-interacting antenna units or systems |
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H01Q 21/29
|
Combinations of different interacting antenna units for giving a desired directional characteristic |
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H01Q 21/30
|
Combinations of separate antenna units operating in different wavebands and connected to a common feeder system |
|
H01Q 23/00
|
Antennas with active circuits or circuit elements integrated within them or attached to them |
|
H01Q 25/00
|
Antennas or antenna systems providing at least two radiating patterns |
|
H01Q 25/02
|
Antennas or antenna systems providing at least two radiating patterns providing sum and difference patterns |
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H01Q 25/04
|
Multimode antennas |
