Patents
Patents for H01Q 25 - Aerials or aerial systems providing at least two radiating patterns (4,128)
09/1987
09/09/1987EP0235932A1 Dual mode radar system
09/08/1987US4692769 Dual band slotted microstrip antenna
08/1987
08/25/1987US4689630 Multi-shaped-beam reflector antenna
08/20/1987DE3605195A1 Antenna having a parabolic reflector
08/20/1987DE3604432A1 Mode coupler for monopulse applications
08/20/1987DE3604431A1 Mode coupler for monopulse applications
08/18/1987US4687445 Subsurface antenna system
07/1987
07/21/1987US4682180 Multidirectional feed and flush-mounted surface wave antenna
07/15/1987EP0228743A1 Plane microwave antenna for the simultaneous reception of two polarizations
07/15/1987EP0228742A1 Plane microwave antenna with suspended strip lines, and method for its production
07/08/1987EP0227910A2 Beam forming network for a butler matrix fed circular array
07/01/1987EP0227005A2 Transmitting device comprising two microwave transmitters radiating different frequencies with different radiation patterns
06/1987
06/23/1987US4675689 Grooved horn radiator with mode coupler
06/23/1987US4675685 Low VSWR, flush-mounted, adaptive array antenna
06/23/1987US4675681 Rotating planar array antenna
06/23/1987CA1223344A1 Monopulse feeder for transmitting and receiving radar signals within two mutually separated frequency bands
06/19/1987DE3545639C1 Transmitter operating at at least two frequencies - uses single VHF antenna array with different polar diagrams
06/19/1987DE3544092A1 Multi-band antenna for the GHz band
06/16/1987US4673943 Integrated defense communications system antijamming antenna system
06/16/1987US4673942 Array antenna system
06/09/1987US4672687 Polarity switch for satellite television receiver
06/09/1987US4672387 Antenna systems for omnidirectional pattern
06/09/1987US4672384 Circularly polarized radio frequency antenna
05/1987
05/19/1987US4667201 Electronic scanning antenna
04/1987
04/28/1987CA1221163A1 Four-port network coupling arrangement for microwave antennas employing monopulse follow-up
04/21/1987US4660050 Doppler radar velocity measurement horn
04/14/1987US4658257 Radar system
04/01/1987EP0216331A2 A multidirectional feed and flush-mounted surface wave antenna
03/1987
03/24/1987US4652879 Phased array antenna system to produce wide-open coverage of a wide angular sector with high directive gain and strong capability to resolve multiple signals
03/10/1987US4649391 Monopulse cavity-backed multipole antenna system
03/04/1987EP0213040A2 External unit for a microwave feed aerial
03/04/1987EP0212963A2 Omni-directional antenna
03/03/1987US4647938 Double grid reflector antenna
02/1987
02/17/1987US4644363 Integrated dual beam line scanning antenna and negative resistance diode oscillator
02/17/1987US4644360 Microstrip space duplexed antenna
02/05/1987DE3609084A1 Reflector arrangement
02/05/1987DE3609078A1 Reflector arrangement
02/03/1987US4641144 Broad beamwidth lens feed
02/03/1987CA1217558A1 Dual space fed parallel plate lens antenna beamforming system
01/1987
01/27/1987US4639731 Monopulse feeder for transmitting and receiving radar signals within two mutually separated frequency bands
01/22/1987DE3525553A1 Directional antenna
01/20/1987US4638318 Small angular beamwidth antenna system
01/08/1987DE3524132A1 Surveillance radar antenna
01/07/1987EP0207511A2 Electronically scanned phased-array antenna
01/07/1987EP0207213A1 Method for generating antenna tracking signals
01/06/1987US4635070 Dual mode antenna having simultaneous operating modes
12/1986
12/30/1986US4633256 Method and apparatus for four-beam radar
12/30/1986EP0206359A2 Direction-finding equipment
12/16/1986US4630064 Spiral antenna with selectable impedance
12/16/1986US4630063 Log-periodic antenna
12/16/1986US4630059 Four-port network coupling arrangement for microwave antennas employing monopulse tracking
12/03/1986EP0203193A1 High gain-area-product antenna design
12/02/1986US4626858 Antenna system
11/1986
11/25/1986US4625214 Dual gridded reflector structure
11/25/1986US4625211 Adaptive antenna array
11/18/1986US4623891 Far-field nulling technique for reducing the susceptibility to cross-polarized signal in dual-polarized monopulse-type tracking antennas
10/1986
10/28/1986CA1213341A1 Direction-finding system
10/21/1986US4618866 Dual reflector antenna system
10/21/1986US4618831 Power amplifying apparatus
10/21/1986CA1213025A1 Method and apparatus for obtaining antenna tracking signals
10/07/1986US4616230 Conformal phased array antenna pattern corrector
09/1986
09/23/1986CA1211836A1 Small angular beamwidth antenna system
09/16/1986US4612548 Multi-port radio frequency networks for an antenna array
09/16/1986US4612547 Electronically scanned antenna
08/1986
08/19/1986US4607259 Adaptive antenna for reducing multipath fades
08/13/1986EP0190812A2 Improved polarity switch for satellite television receiver
08/12/1986US4605934 Broad band spiral antenna with tapered arm width modulation
08/12/1986US4605931 Crossover traveling wave feed for microstrip antenna array
08/06/1986EP0189661A2 Polarity switch for satellite television receiver
08/05/1986US4604624 Phased array antenna employing linear scan for wide-angle arc coverage with polarization matching
07/1986
07/29/1986US4603334 Multi beam antenna and its configuration process
07/29/1986US4603332 Interleaved microstrip planar array
07/08/1986US4599622 Phase only adaptive nulling in a monopulse antenna
07/02/1986EP0186496A2 Antenna system for circularly polarized waves
07/02/1986EP0185994A2 Arrangement for forming directional channels by reception of wave energy
06/1986
06/24/1986CA1206606A1 Antenna construction
06/24/1986CA1206604A1 Multi beam antenna and its configuration process
06/17/1986US4595929 Scheme for aberration correction in scanning or multiple beam confocal antenna system
06/17/1986US4595926 Dual space fed parallel plate lens antenna beamforming system
06/17/1986CA1206254A1 Phased array antenna employing linear scan for wide- angle arc coverage with polarization matching
06/10/1986CN85107501A Dual gridded reflector structure
06/10/1986CA1205902A1 Electrical power dividers
06/05/1986WO1986003344A1 High gain-area-product antenna design
05/1986
05/27/1986US4591866 Multi-beam antenna and its configuration process
05/27/1986US4591864 Frequency independent twisted wave front constant beamwidth lens antenna
05/21/1986EP0181617A2 Reflector for use in an antenna
05/20/1986US4590479 Broadcast antenna system with high power aural/visual self-diplexing capability
05/09/1986WO1986002780A1 Method and means for repairing radar reflectors
04/1986
04/23/1986EP0178638A2 Line-fed phased array antenna
04/22/1986US4584582 Multi-mode direction finding antenna
04/22/1986US4584581 Beam forming network for multibeam array antenna
04/15/1986US4583061 Radio frequency power divider/combiner networks
04/01/1986US4580140 Twin aperture phased array lens antenna
03/1986
03/25/1986US4578679 Method and apparatus for obtaining antenna tracking signals
03/18/1986CA1202105A1 Passive electromagnetic wave duplexer comprising a semiconductor
03/18/1986CA1202086A1 Directivity diversity communication system with microstrip antenna
03/12/1986EP0174250A1 Device for receiving dual polarized microwave signals
03/11/1986US4575726 Antenna construction including two superimposed polarized parabolic reflectors
03/04/1986US4574288 Passive electromagnetic wave duplexer for millimetric antenna
02/1986
02/18/1986US4571591 Three dimensional, orthogonal delay line bootlace lens antenna
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