Patents for H01Q 21 - Aerial arrays or systems (25,127) |
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11/08/1988 | US4783666 Protective shield for an antenna array |
11/08/1988 | US4783663 Unit modules for a high-frequency antenna and high-frequency antenna comprising such modules |
11/08/1988 | US4783661 Dual-band circularly polarised antenna with hemispherical coverage |
11/02/1988 | EP0289085A2 Phase control microstripline antenna |
11/02/1988 | EP0288497A1 Array beam position control using compound slots. |
11/02/1988 | CN87205268U Microstrip antenna array |
11/01/1988 | USH548 Group orthogonal arrays for elimination of multiple-time-around echos in radars |
10/25/1988 | US4780723 Microstrip antenna compressed feed |
10/19/1988 | CN88211319U Three-stub type vhf/uhf mixer |
10/18/1988 | US4777718 Method of forming and connecting a resistive layer on a pc board |
10/12/1988 | EP0286526A1 Self-protected transportable planar antenna array |
10/12/1988 | EP0285743A2 Linear array of half wave dipoles with quarter wave dipoles at the ends |
10/12/1988 | EP0104173B1 An electronically scanned antenna system having a linear array of yagi antennas |
10/11/1988 | US4777490 Monolithic antenna with integral pin diode tuning |
10/11/1988 | US4776086 Method and apparatus for hyperthermia treatment |
10/06/1988 | WO1988007786A2 Equal power amplifier system for active phase array antenna and method of arranging same |
10/06/1988 | WO1988007770A1 Plural level beam-forming network |
10/05/1988 | EP0285303A1 Broadcasting wave reception antenna |
10/04/1988 | US4775866 Two-frequency slotted planar antenna |
10/04/1988 | CA1242796A1 Microwave plane antenna |
09/22/1988 | WO1988007269A1 Omnidirectional antenna system |
09/21/1988 | CN88100814A 天线 Antenna |
09/20/1988 | US4772890 Multi-band planar antenna array |
09/13/1988 | US4771330 Wire bonds and electrical contacts of an integrated circuit device |
09/13/1988 | US4771294 Modular interface for monolithic millimeter wave antenna array |
09/07/1988 | EP0280799A1 Antenna system for wide bandwidth signals |
08/31/1988 | CN88212232U Twin-layer uhf receiving antenna compatible for vhf |
08/25/1988 | WO1988006351A1 A transmit-receive means for phased-array active antenna system |
08/23/1988 | US4766444 Conformal cavity-less interferometer array |
08/18/1988 | DE3703812A1 Antenna arrangement |
08/16/1988 | US4764771 Antenna feed network employing over-coupled branch line couplers |
08/10/1988 | EP0277207A1 Flat phased array antenna |
08/10/1988 | CN87205789U Coaxial cross nondirectional antenna |
08/09/1988 | US4763131 Log-periodic monopole antenna array |
08/09/1988 | US4763130 Probe-fed slot antenna with coupling ring |
08/03/1988 | EP0276248A1 Radar transceiver employing circularly polarized waveforms |
08/02/1988 | US4761827 Polarity switch for satellite television receiver |
08/02/1988 | US4761654 Electromagnetically coupled microstrip antennas having feeding patches capacitively coupled to feedlines |
08/02/1988 | US4761653 Microstrip antenna |
08/02/1988 | CA1240038A1 Dipole antenna system with overhead coverage having equidirectional-linear polarization |
08/02/1988 | CA1240037A1 Microstrip space duplexed antenna |
08/02/1988 | CA1240036A1 Microstrip antenna having unipole antenna |
07/28/1988 | WO1988005609A1 Slot antenna in circular waveguide |
07/27/1988 | EP0275303A1 Low sidelobe solid state phased array antenna apparatus. |
07/26/1988 | US4760394 Antenna for transmitting and/or receiving radio waves by way of electromagnetic induction |
07/21/1988 | DE3642735C1 Antenna array consisting of two log-periodic individual dipole antennas |
07/19/1988 | US4758843 Printed, low sidelobe, monopulse array antenna |
07/19/1988 | US4758842 Horn antenna array phase matched over large bandwidths |
07/19/1988 | CA1239473A1 Microwave plane antenna |
07/13/1988 | EP0273923A1 Combined uplink and downlink satellite antenna feed network |
07/12/1988 | US4757324 Antenna array with hexagonal horns |
07/05/1988 | US4755829 System for radiating coherent microwave radiation at predetermined frequency |
07/05/1988 | US4755821 Planar antenna with patch radiators |
06/29/1988 | CN87201567U Picture-frame tv receiving antenna |
06/28/1988 | CA1238714A1 Shaped beam antenna |
06/22/1988 | EP0271685A1 Antenna made of two or more radiating rods one upon the other |
06/22/1988 | EP0271517A1 Array antenna. |
06/22/1988 | EP0271504A1 Horn antenna array phase matched over large bandwidths. |
06/21/1988 | US4752781 Side-locking airborne radar (SLAR) antenna |
06/15/1988 | EP0271458A2 Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines |
06/08/1988 | EP0270209A2 Dual-band circularly polarised antenna with hemispherical coverage |
06/07/1988 | US4750000 Ultra-broadband impedance matched electrically small self-complementary signal radiating structures with impedance-inverting feed for complementary pairs using thin wire elements |
06/07/1988 | US4749997 Modular antenna array |
06/07/1988 | CA1237809A1 Interleaved microstrip planar array |
06/07/1988 | CA1237808A1 Crossed-drooping dipole antenna |
06/02/1988 | WO1988004109A1 Monopulse antenna with improved sidelobe suppression |
06/01/1988 | EP0121568B1 Continuous ferrite aperture for electronic scanning antennas |
06/01/1988 | DE3701518A1 Radio antenna having two or more than two radiator sections which are arranged one above the other and are formed by rods |
05/24/1988 | US4746927 VOR antenna design |
05/24/1988 | US4746923 For achieving frequency/temperature compensation |
05/24/1988 | US4746867 For detection of objects buried in the ground |
05/19/1988 | WO1988003712A1 Microwave antenna array waveguide assembly |
05/11/1988 | EP0266925A1 Antenna |
05/11/1988 | EP0266567A1 Method for the surveillance and control of an antenna selector, and an antenna selector for carrying out the method |
05/10/1988 | US4743915 Four-horn radiating modules with integral power divider/supply network |
05/10/1988 | US4743911 Constant beamwidth antenna |
05/10/1988 | US4743906 Time domain radio transmission system |
05/03/1988 | US4742567 Automobile antenna system |
05/03/1988 | US4742355 Serpentine feeds and method of making same |
05/03/1988 | US4742354 Radar transceiver employing circularly polarized waveforms |
05/03/1988 | US4742314 Solid state millimeter wave power combiner |
04/27/1988 | CN87207286U Cross-compatible all-channel television antenna with telescopic reflector |
04/26/1988 | CA1235752A1 Portable radio communication apparatus comprising an antenna member for a broad-band signal |
04/21/1988 | WO1988002934A1 Array beam position control using compound slots |
04/20/1988 | EP0264170A1 An antenna |
04/20/1988 | EP0264056A2 Vehicle antenna with shiftable gain patterns |
04/19/1988 | US4739332 Fanbeam inversion radar |
04/12/1988 | US4737793 Radio frequency antenna with controllably variable dual orthogonal polarization |
04/06/1988 | EP0262931A2 Planar antenna |
04/06/1988 | CN87107605A Auto-control method and auto-controller of common tv antenna system |
03/29/1988 | US4734703 Three-wave antenna for vehicle |
03/29/1988 | CA1234621A1 Crossover traveling wave feed |
03/08/1988 | US4730193 Microstrip antenna bulk load |
03/02/1988 | EP0257881A2 Slotted waveguide antenna and array |
03/01/1988 | US4728962 Microwave plane antenna |
03/01/1988 | US4728897 Microwave reflection survey technique for determining depth and orientation of buried objects |
02/25/1988 | WO1988001444A1 Flat phased array antenna |
02/23/1988 | CA1233246A1 Side-looking airborne radar (slar) antenna |
02/18/1988 | DE3627597A1 Conformal antenna for missiles |
02/18/1988 | DE3627596A1 Circular array antenna arrangement |