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