| Patents for H01Q 3 - Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an aerial or aerial system (21,949) |
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| 03/20/1991 | EP0417679A1 Multiple beam antenna, steerable by low switching rate |
| 03/20/1991 | EP0417472A2 Apparatus for the automatic positioning of a satellite antenna |
| 03/19/1991 | US5001778 Portable radio receiver |
| 03/19/1991 | US5001495 Adaptive microwave spatial filter operating on-reflection, and a corresponding method |
| 03/19/1991 | US5001492 An antenna system |
| 03/19/1991 | US5001336 Optical signal summing device |
| 03/14/1991 | CA2025154A1 Multibeam antenna steerable by means of a low level switching |
| 03/13/1991 | EP0416872A2 Antenna switching system |
| 03/13/1991 | EP0416264A2 Adaptive polarization combining system |
| 03/09/1991 | WO1991003846A1 Microstrip antenna system |
| 03/07/1991 | CA2021905A1 Adaptive polarization combining system |
| 03/06/1991 | EP0415818A1 Control of beam direction for antenna system with electronic scanning and beamforming by computation |
| 03/06/1991 | EP0415574A2 Antenna array |
| 03/06/1991 | CN2072731U Multi-dimensional adjustable art tv antenna |
| 03/05/1991 | US4998112 Method for measuring large antenna arrays |
| 03/02/1991 | CA2024380A1 Pointing control for antenna system with electronic scanning and digital beam forming |
| 03/01/1991 | CA2023442A1 Antenna array |
| 02/27/1991 | CN2072280U Rotating apparatus for aerial |
| 02/26/1991 | US4996484 Method and apparatus for cancelling powerline noise in geophysical electromagnetic exploration |
| 02/21/1991 | WO1991001620A2 Multi-element antenna system and array signal processing method |
| 02/21/1991 | DE4025766A1 Electronically controllable vehicle antenna - uses plate separated by dielectric material with permeability controlled by dc voltage |
| 02/19/1991 | US4994815 Tracking controller for three-axis mount antenna systems |
| 02/19/1991 | US4994814 Phase shift data transfer system for phased array antenna apparatuses |
| 02/19/1991 | US4994813 Antenna system |
| 02/13/1991 | CN2071390U Tv antenna active feeding device for eliminating double image |
| 02/05/1991 | US4990924 Satellite locating system |
| 01/30/1991 | EP0410725A2 Electronic means for switching antennas to a common bus |
| 01/30/1991 | EP0409927A1 Self-adaptive directional filtering and polarisation device for radioelectric waves. |
| 01/29/1991 | US4989011 Dual mode phased array antenna system |
| 01/28/1991 | CA2019017A1 Electronic means of switching antennas to a common bus |
| 01/24/1991 | WO1991001049A1 Electronic deflection device for an ultrahigh frequency beam |
| 01/23/1991 | EP0409509A2 Waveguide coupling network |
| 01/20/1991 | CA2013287A1 Satellite locating system |
| 01/17/1991 | DE4011155A1 Adjustable holder for aerial reflectors - has cross joint axes corresp. to those of azimuth, or elevation, and independent stop for both rotary motion |
| 01/16/1991 | EP0408323A2 Discrete increment signal processing system and method using parallel branched N-state networks |
| 01/15/1991 | US4985707 Retrodirective adaptive loop for meteor communications |
| 01/09/1991 | EP0407258A1 Ultrahigh frequency energy distributor radiating directly |
| 01/09/1991 | EP0407243A1 Multiple beam antenna system with active modules and with formation of beams by numerical calculation |
| 01/09/1991 | EP0406563A1 Broadband microstrip-fed antenna |
| 01/08/1991 | US4983982 Space fed phased array antenna with dual phase shifter |
| 01/08/1991 | US4983981 Active array element amplitude stabilization |
| 01/06/1991 | CA2016442A1 Broadband microstrip-fed antenna |
| 01/02/1991 | EP0405372A1 Multiple-beam array antenna |
| 01/02/1991 | CN1048285A Multi-element antenna system and array signal processing method |
| 12/27/1990 | EP0403684A2 Antenna positioning system |
| 12/25/1990 | US4980692 Frequency independent circular array |
| 12/25/1990 | US4980691 Distributed planar array beam steering control with aircraft roll compensation |
| 12/19/1990 | EP0403341A1 Rotary dipole antenna for decametric waves |
| 12/19/1990 | EP0403176A2 Continually variable analog phase shifter |
| 12/18/1990 | CA1278114C Satellite communications system employing frequency reuse |
| 12/13/1990 | WO1990015342A1 Power efficient feed network for tacan antenna arrays |
| 12/13/1990 | CA2018711A1 Rotating antenna with dipoles for hf waves |
| 12/09/1990 | CA2018343A1 Apparatus for mounting an antenna for rotation on a mast |
| 12/05/1990 | EP0400001A1 Multipath reduction system |
| 12/04/1990 | US4975712 Two-dimensional scanning antenna |
| 12/04/1990 | US4975708 Time domain electronic antenna beam shaping |
| 12/02/1990 | CA2017463A1 Multi-element antenna system and array signal processing method |
| 11/28/1990 | EP0399206A1 Signal routing system |
| 11/28/1990 | EP0215117B1 Spread spectrum adaptive antenna interference canceller |
| 11/27/1990 | US4973971 Broadband circular phased array antenna |
| 11/25/1990 | WO1990014720A1 Signal routing system |
| 11/22/1990 | EP0398637A2 Beam steering module |
| 11/22/1990 | EP0398555A2 Lightweight, low profile phased array antenna with electromagnetically coupled integrated subarrays |
| 11/22/1990 | EP0397916A2 Distributed planar array beam steering control with aircraft roll compensation |
| 11/22/1990 | DE3915883A1 Automatic tracking system for parabolic aerials - follows satellite using detecting coupled to compass to operate synchronous motor |
| 11/20/1990 | WO1990014696A1 Antenna apparatus with reflector or lens consisting of a frequency scanned grating |
| 11/20/1990 | US4972361 Folded linear systolic array |
| 11/20/1990 | US4972151 Steered-beam satellite communication system |
| 11/20/1990 | CA2058304A1 Antenna apparatus with reflector or lens consisting of a frequency scanned grating |
| 11/16/1990 | CA2014665A1 Lightweight, low profile phased array antenna with electromagnetically coupled integrated subarrays |
| 11/14/1990 | EP0396668A1 Radar system for determining angular position utilizing a linear phased array antenna |
| 11/14/1990 | CN2065796U Rotation device for tv antenna |
| 11/13/1990 | US4970521 Phased array antenna alignment method |
| 11/13/1990 | US4970520 Process for resighting telecommunication antennas and apparatus for carrying it out |
| 11/07/1990 | EP0396015A1 Transponder with selective antenna beam using shared antennna feed elements |
| 11/07/1990 | EP0395863A2 Aperture synthesized radiometer using digital beamforming techniques |
| 11/06/1990 | US4969211 Transceiver interference cancellation system |
| 10/31/1990 | EP0395239A1 Antenna beam forming system |
| 10/23/1990 | US4965605 Lightweight, low profile phased array antenna with electromagnetically coupled integrated subarrays |
| 10/23/1990 | US4965604 High-power high-isolation switch |
| 10/23/1990 | US4965603 Optical beamforming network for controlling an RF phased array |
| 10/23/1990 | US4965602 Digital beamforming for multiple independent transmit beams |
| 10/23/1990 | US4965588 Electronically scanned antenna |
| 10/23/1990 | US4965587 Antenna which is electronically reconfigurable in transmission |
| 10/18/1990 | DE3910877A1 Doppler direction-finding antenna |
| 10/17/1990 | EP0392416A1 Process for applying a controlled delay to a signal, particularly an ultra-high frequency signal, delay device, optical transmission system and antenna system applying this process |
| 10/17/1990 | CN2064108U Single spiral tv antenna |
| 10/16/1990 | CA1275324C Phase scan antenna |
| 10/11/1990 | CA2010152A1 Systolic array processing apparatus |
| 10/09/1990 | US4962382 Modified multi-channel Bragg cell using a phased array structure for the improvement of overall efficiency |
| 10/09/1990 | US4962381 Systolic array processing apparatus |
| 10/03/1990 | CN2063299U Lightning-protecting rotary apparatus for varying orientation of tv aerial |
| 10/02/1990 | US4961062 Continually variable analog phase shifter |
| 10/02/1990 | US4960010 Drive and locking system |
| 09/25/1990 | US4959653 Adaptive sidelobe blanker |
| 09/25/1990 | US4959559 Electromagnetic or other directed energy pulse launcher |
| 09/19/1990 | CN2062502U Omnibearing automatic directional controller |
| 09/18/1990 | US4958167 Ultra-broadband impedance matched electrically small complementary signal radiating structures using thin wire elements and an impedance optimizing feed circuit |
| 09/18/1990 | CA1274309A1 Beam steering unit real time angular monitor |
| 09/13/1990 | DE3907203A1 Device for radar image scanning |