Patents for H01Q 25 - Aerials or aerial systems providing at least two radiating patterns (4,128) |
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02/12/1986 | EP0171149A1 Electronic tracking system for microwave antennas |
02/11/1986 | CA1200595A1 Monopulse radar antenna |
02/05/1986 | EP0170154A1 Cross-polarized dual-frequency antenna with the same area coverage for telecommunication satellites |
02/04/1986 | US4568944 Y-Shaped dipole antenna |
12/18/1985 | EP0164466A1 High-efficiency multibeam antenna |
12/10/1985 | US4558324 Multibeam lens antennas |
11/26/1985 | US4555708 Dipole ring array antenna for circularly polarized pattern |
11/26/1985 | US4555706 Simultaneous nulling in the sum and difference patterns of a monopulse radar antenna |
10/02/1985 | EP0156685A1 Anti-jamming process for an array antenna, and antenna using such a process |
10/02/1985 | EP0156604A1 A beam forming network |
10/01/1985 | US4544925 Assembly of main and auxiliary electronic scanning antennas and radar incorporating such an assembly |
09/24/1985 | US4543579 Circular polarization antenna |
09/17/1985 | CA1193715A1 Gamma feed microstrip antenna |
09/10/1985 | US4540988 Broadband multi-element antenna |
08/27/1985 | US4538153 Directivity diversity communication system with microstrip antenna |
08/13/1985 | US4535338 Multibeam antenna arrangement |
07/30/1985 | US4532519 Phased array system to produce, steer and stabilize non-circularly-symmetric beams |
07/23/1985 | US4531129 Multiple-feed luneberg lens scanning antenna system |
07/16/1985 | US4529990 Antenna system for a jamming transmitter |
07/16/1985 | US4529988 Travelling wave antenna with side lobe elimination |
07/10/1985 | EP0148136A1 Monopulse feeder for two separated frequency bands |
07/09/1985 | CA1190317A1 Primary source with frequency re-utilization |
06/25/1985 | US4525716 Technique for cancelling antenna sidelobes |
06/19/1985 | EP0145274A1 Array antenna system |
06/11/1985 | US4523198 Radio frequency lens antenna |
05/28/1985 | US4520362 Polarization ratiometry object detection system and method |
05/22/1985 | EP0141886A1 Monopulse detection systems |
05/15/1985 | EP0141281A2 Device for preventing a main beam parallax in a circularly polarized antenna camprising a curved reflector and an off-set primary radiating element |
05/14/1985 | US4517572 System for reducing blocking in an antenna switching matrix |
05/07/1985 | US4516128 Beam waveguide feeder |
05/07/1985 | US4516127 Three element low profile antenna |
04/23/1985 | US4513292 For operation over a range of frequencies |
03/26/1985 | US4507665 Primary source with frequency re-utilization |
03/19/1985 | US4506268 Log-periodic antenna |
03/05/1985 | US4503436 In an electromagnetic communication system |
03/05/1985 | US4503434 Lossless arbitrary output dual mode network |
02/26/1985 | US4501399 Hybrid monopulse/sequential lobing beamrider guidance |
02/12/1985 | US4499474 Slot antenna with face mounted baffle |
02/12/1985 | US4499473 Cross polarization compensation technique for a monopulse dome antenna |
02/12/1985 | US4499471 Reconfigurable dual mode network |
01/30/1985 | EP0132378A2 Multiple beam scanning radar system |
01/22/1985 | US4495504 Radio frequency antenna having a reflector with an edge in a pattern null region to reduce edge scattering |
01/15/1985 | US4494117 Dual sense, circularly polarized helical antenna |
01/08/1985 | US4492964 Groundplane mounted log-periodic antenna |
01/08/1985 | CA1180801A1 Microwave transmission device with multimode diversity combined reception |
01/02/1985 | EP0130154A2 Multi-shaped-beam reflector antenna |
12/27/1984 | EP0129333A2 Adaptive antenna array |
12/27/1984 | EP0128970A1 Four-port network for a monopulse-tracking microwave antenna |
12/25/1984 | US4490725 Log-periodic antenna |
12/25/1984 | US4490723 Parallel plate lens antenna |
12/18/1984 | US4489331 Two-band microwave antenna with nested horns for feeding a sub and main reflector |
12/18/1984 | US4489325 Electronically scanned space fed antenna system and method of operation thereof |
11/13/1984 | US4482897 Multibeam segmented reflector antennas |
11/07/1984 | EP0123870A1 Doppler radar velocity measurement apparatus |
10/16/1984 | CA1176368A1 Two-band microwave source and an antenna equipped with said source |
10/09/1984 | US4476470 Three horn E-plane monopulse feed |
09/25/1984 | US4473828 Microwave transmission device with multimode diversity combined reception |
09/18/1984 | CA1174760A1 Multimode ultrahigh-frequency source comprising a profiled obstacle |
09/11/1984 | US4471361 Phase reconfigurable beam antenna system |
08/28/1984 | US4468670 Antenna device for air traffic radar |
08/07/1984 | US4464666 Multiple reflector antenna |
08/07/1984 | US4464663 Dual polarized, high efficiency microstrip antenna |
07/25/1984 | EP0113985A2 Receiving or transmitting multiple beam array |
07/25/1984 | EP0113901A2 Mode filter |
07/17/1984 | US4460898 Four element antenna turnstile tracking system |
07/10/1984 | US4459596 Coaxial antenna configuration with high inter-element isolation |
07/03/1984 | US4458249 Multi-beam, multi-lens microwave antenna providing hemispheric coverage |
06/26/1984 | US4456913 Sub-array polarization control for a monopulse dome antenna |
05/23/1984 | EP0109322A1 Double reflector antenna for a tracking radar improving the target acquisition capability |
05/22/1984 | US4450451 Gimbal assembly for monopulse radar antenna |
05/16/1984 | EP0108094A1 Radiogoniometric device. |
04/25/1984 | EP0106494A2 Electronically scanned antenna |
04/17/1984 | US4443804 Modified difference mode coaxial antenna with flared aperture |
03/27/1984 | US4439773 Compact scanning beam antenna feed arrangement |
03/20/1984 | US4438437 Dual mode blade antenna |
03/20/1984 | CA1164088A1 Antenna feeder system |
03/20/1984 | CA1164087A1 Array antenna system |
02/29/1984 | EP0101533A1 Radar antenna |
02/08/1984 | EP0100123A2 A directive antenna element |
01/18/1984 | EP0098618A2 System for the electronical sector scanning of the beam of a monopulse radar antenna |
01/10/1984 | US4425567 Beam forming network for circular array antennas |
12/27/1983 | US4423392 Dual-mode stripline antenna feed performing multiple angularly separated beams in space |
12/13/1983 | US4420756 Multi-mode tracking antenna feed system |
12/13/1983 | CA1158766A1 Rectangular beam shaping antenna |
12/06/1983 | US4419670 Dual feed box horn antenna |
11/29/1983 | US4418349 Airport surveillance system |
11/15/1983 | US4415901 Low power beam switchable antenna arrangement |
11/10/1983 | WO1983003904A1 Radiogoniometric device |
11/09/1983 | EP0093234A1 Method of producing antenna tracking signals |
10/18/1983 | US4410894 Array phasing techniques for wide area coverage in a failure mode |
10/05/1983 | EP0090400A1 Surveillance radar aerial suited to elevation measurement |
09/14/1983 | EP0088528A1 Secondary surveillance radar system |
09/06/1983 | US4403221 Millimeter wave microstrip antenna |
08/24/1983 | EP0086558A1 Improvements in or relating to antenna array circuits |
08/23/1983 | US4400701 Common antenna for primary and secondary radar |
08/09/1983 | US4398200 Feed apertures with crosspolarization compensation for linear polarization |
08/02/1983 | US4396921 Matching section for multi-arm spiral antenna |
07/26/1983 | US4395714 Antenna array system usable for AM/FM receiver |
07/05/1983 | US4392139 Aircraft television antenna receiving system |
06/14/1983 | US4388626 Phased array antennas using frequency multiplication for reduced numbers of phase shifters |