Patents
Sitemap › H01 - Basic electric elements › H01Q - Aerials › H01Q 21 - Aerial arrays or systems
Patents for H01Q 21 - Aerial arrays or systems (25,127)
08/1991
08/06/1991US5038149 Antenna with three-dimensional coverage and electronic scanning, of the random spare volume array type
08/06/1991US5038147 Electronically scanned antenna
08/06/1991US5038146 Array built in test
08/01/1991DE4002522A1 Sum and difference unit for radar group antenna - has single structure with eight sections arranged in quadrants
07/1991
07/31/1991EP0438564A1 Hyperthermic microwave applicator
07/30/1991US5036331 Adaptive polarization combiner
07/30/1991CA2035111A1 Slotted waveguide antenna, particularly for space radars
07/30/1991CA1287109C Microwave radiometer
07/25/1991WO1991010918A1 Collision avoidance transmit system with autocalibration
07/24/1991EP0271517B1 Array antenna
07/24/1991EP0142555B1 Dual band phased array using wideband elements with diplexer
07/23/1991US5034753 Acoustically coupled antenna
07/23/1991US5034752 Multiple-beam antenna system with active modules and digital beam-forming
07/23/1991US5034750 Pulse radar and components therefor
07/18/1991DE4000763A1 Printed circuit group antenna - used circular symmetrical array on dielectric substrate to reduce cross polarisation economically
07/17/1991EP0437190A2 Polarization converter application for accessing linearly polarized satellites with single- or dual-circularly polarized earth station antennas
07/16/1991US5032844 Sky wave direction finder
07/10/1991CN2080710U Microband antenna for c waveband ground satellite receiving station
07/09/1991US5030965 Slot antenna having controllable polarization
07/09/1991US5030963 Signal receiver
07/09/1991US5030961 Microstrip antenna with bent feed board
07/03/1991EP0435739A1 Magic microwave source and its application in an antenna with electronic scanning
07/03/1991EP0435562A2 Array antenna with forced excitation
07/03/1991CN1052751A C band satellite ground receiving station micro belt antenna
07/02/1991US5028891 Arrangement for supplying power to a hollow waveguide intended for electromagnetic microwaves
06/1991
06/27/1991WO1991009317A2 Comb generator, device and process for calibrating measurement sections
06/26/1991EP0434283A2 Planar array waveguide antenna with L-shaped series/series coupling slots
06/26/1991EP0434282A2 Dual mode antenna apparatus having slotted waveguide and broadband arrays
06/26/1991EP0434268A2 Microstrip antenna
06/25/1991US5027124 System for maintaining polarization and signal-to-noise levels in received frequency reuse communications
06/25/1991US5027084 Transceiver modules for phased array antenna
06/19/1991EP0433255A2 Orthogonally polarized dual-band printed circuit antenna employing radiating elements capacitively coupled to feedlines
06/19/1991EP0433092A2 Polarization converter having two converting devices therein
06/19/1991EP0432647A2 Mobile antenna system
06/18/1991US5025493 Multi-element antenna system and array signal processing method
06/18/1991US5025264 Circularly polarized antenna with resonant aperture in ground plane and probe feed
06/18/1991CA1285030C Antenna beam boundary detector for preliminary handoff determination
06/12/1991EP0431764A2 Antenna with curved dipole elements
06/12/1991CA2031872A1 Mobile antenna system
06/11/1991US5023634 Antenna system
06/11/1991US5023624 Microwave chip carrier package having cover-mounted antenna element
06/11/1991US5023623 Dual mode antenna apparatus having slotted waveguide and broadband arrays
06/05/1991EP0430745A1 Circular polarized antenna, particularly for array antenna
06/05/1991EP0430516A2 A periodic array with a nearly ideal element pattern
06/04/1991US5021797 Antenna for transmitting elliptically polarized television signals
06/04/1991US5021796 Broad band, polarization diversity monopulse antenna
05/1991
05/29/1991EP0429338A1 Circularly polarised antenna particularly for antenna arrays
05/29/1991CN1051828A Microwave planar array antenna
05/28/1991US5019831 Dual end resonant slot array antenna feed having a septum
05/25/1991CA2029380A1 Circular polarisation antenna, particularly for an antenna network
05/25/1991CA2029378A1 Circular polarization antenna, particularly for an antenna network
05/23/1991DE4037851A1 Coaxial wide band TV or radio aerial - has non-conductive horizontal plane and fed, elongate, conductive, grid-shaped radiator element with two mirror-shaped inner conductors
05/22/1991EP0428299A2 Slot antenna having controllable polarization
05/22/1991CN2077595U Ommidirectional thin tv antenna
05/21/1991US5017932 Miniature antenna
05/21/1991US5017931 Interleaved center and edge-fed comb arrays
05/21/1991US5017928 Low sidelobe array by amplitude edge tapering the edge elements
05/21/1991US5017927 Monopulse phased array antenna with plural transmit-receive module phase shifters
05/21/1991US5017925 Multiple beam deployable space antenna system
05/16/1991WO1991007043A1 Improved microcell system for cellular telephone systems
05/16/1991WO1991007019A1 Zoned microcell with sector scanning for cellular telephone systems
05/16/1991WO1991001620A3 Multi-element antenna system and array signal processing method
05/15/1991EP0427479A2 Planar array antenna
05/15/1991EP0427470A2 Constant beamwidth scanning array
05/15/1991EP0426972A1 Flat antenna
05/15/1991CA2029329A1 Radiating element excitation non-inclinated radiating slot guide
05/08/1991CN2076716U Electronic frequency-dividing type high definition all channel aerial
04/1991
04/30/1991US5012256 Array antenna
04/30/1991US5012254 Plural level beam-forming netowrk
04/24/1991EP0423972A2 Space fed phased array antenna with dual phase shifter
04/24/1991EP0423853A1 Planar circular polarized high frequency antenna
04/23/1991US5010351 Slot radiator assembly with vane tuning
04/18/1991WO1991005373A1 Adaptable antenna
04/17/1991EP0422551A1 Electronically scanned transmitting antenna
04/17/1991EP0422431A2 Angular-diversity device
04/16/1991US5008844 Collision avoidance transmit system with autocalibration
04/11/1991DE4030796A1 Phase controlled three=dimensional group antenna - uses acrylic concentric plates to align multiple dipoles and feeders
04/11/1991DE3932506A1 Phase controlled three=dimensional antenna - uses acrylic concentric rings and plates to align multiple dipoles and feeders
04/10/1991EP0421722A2 Multiple beam deployable space antenna system
04/09/1991US5006859 Patch antenna with polarization uniformity control
04/09/1991US5006858 Microstrip line antenna with crank-shaped elements and resonant waveguide elements
04/09/1991US5006857 Planar microstrip
04/09/1991CA1282862C Modular antenna array
04/03/1991EP0420739A1 Feeding device for a multiple beam antenna
04/02/1991US5005019 Electromagnetically coupled printed-circuit antennas having patches or slots capacitively coupled to feedlines
03/1991
03/20/1991EP0418148A1 Method of making a polymethylpentene based metallized support
03/19/1991US5001778 Portable radio receiver
03/19/1991US5001493 Multiband gridded focal plane array antenna
03/19/1991US5001492 An antenna system
03/19/1991US5001444 Two-frequency radiating device
03/13/1991EP0416264A2 Adaptive polarization combining system
03/13/1991EP0415997A1 Microwave balloon angioplasty
03/13/1991CN2073173U Saw-tooth combined antenna
03/09/1991WO1991003846A1 Microstrip antenna system
03/07/1991WO1991002560A1 Hyperthermic microwave applicator
03/07/1991CA2021905A1 Adaptive polarization combining system
03/06/1991EP0415574A2 Antenna array
03/06/1991CN2072733U Logarithmic period tv antenna
03/06/1991CN2072732U Full-frequency channel non-metallic tv antenna
03/05/1991US4998113 Nested horn radiator assembly
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