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