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