| 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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| 08/14/1991 | EP0441180A1 Integrated circuits containing microwave circuits |
| 08/07/1991 | EP0439939A2 Radio network with switching arrangement for coupling radios to a selected antenna out of a plurality of antennas |
| 08/07/1991 | CN2082464U Multistars tv receiving antenna of great field of view type |
| 08/06/1991 | US5038405 Tunable antenna apparatus and method for use with superheterodyne receivers |
| 08/06/1991 | US5038150 Feed network for a dual circular and dual linear polarization antenna |
| 08/06/1991 | US5038148 Control data transfer system for phase shifters in antenna |
| 08/06/1991 | US5038147 Electronically scanned antenna |
| 08/06/1991 | US5038146 Array built in test |
| 08/06/1991 | CA1287399C Antenna orientation adjusting device for earth station |
| 08/01/1991 | DE4002253A1 Number plate aerial for decimetre range - has ring emitters located, in space behind plate with cable loop connection |
| 07/31/1991 | EP0438664A2 Segmented mirror and method of controlling the same |
| 07/30/1991 | US5036333 Antenna-rotation compensation apparatus and method for phased array antennas |
| 07/30/1991 | US5036331 Adaptive polarization combiner |
| 07/30/1991 | CA1287109C Microwave radiometer |
| 07/25/1991 | WO1991011037A1 Real time signal separation method and device |
| 07/25/1991 | WO1991010917A1 Scanning antenna having multipath resistance |
| 07/25/1991 | DE4001243A1 Circular scanner with rotating mirror for ballistic missile - has scanner driven via spherical bearing allowing variable-angle circular as well as elliptical or linear movements |
| 07/24/1991 | EP0142555B1 Dual band phased array using wideband elements with diplexer |
| 07/24/1991 | CN2081579U Tv antenna amplifying steering unit |
| 07/24/1991 | CA2029373A1 Segmented mirror and method of controlling the same |
| 07/23/1991 | US5034752 Multiple-beam antenna system with active modules and digital beam-forming |
| 07/23/1991 | US5034750 Pulse radar and components therefor |
| 07/17/1991 | EP0437372A2 System for determining direction or attitude using GPS satellite signals |
| 07/17/1991 | EP0437190A2 Polarization converter application for accessing linearly polarized satellites with single- or dual-circularly polarized earth station antennas |
| 07/17/1991 | CN2081154U Preselection type aerial for tv set |
| 07/10/1991 | CA2007508A1 Antenna directional positioning system and indicator |
| 07/04/1991 | DE4011940A1 Car aerial mast coaxial holder - is locked by toothed rim in cab opening with radial trim stabilisers |
| 07/03/1991 | EP0435739A1 Magic microwave source and its application in an antenna with electronic scanning |
| 07/03/1991 | CN2080237U Amplifier of tv remote rotary antenna |
| 07/03/1991 | CN1052751A C band satellite ground receiving station micro belt antenna |
| 07/02/1991 | US5029306 Optically fed module for phased-array antennas |
| 07/02/1991 | US5028931 Adaptive array processor |
| 07/02/1991 | US5028930 Coupling matrix for a circular array microwave antenna |
| 06/27/1991 | WO1991009435A1 Airborne iff antenna with switchable multiple diagrams |
| 06/27/1991 | WO1991009323A2 Detection device |
| 06/26/1991 | EP0433971A1 Device for measuring the movements of flexion of an antenna support mast and application for the pointing control of a motorised antenna |
| 06/26/1991 | CN2079811U Power supply device for tv aerial steering appliance |
| 06/25/1991 | US5027127 Phase alignment of electronically scanned antenna arrays |
| 06/25/1991 | US5027126 Beam steering module |
| 06/25/1991 | US5027125 Semi-active phased array antenna |
| 06/25/1991 | US5027124 System for maintaining polarization and signal-to-noise levels in received frequency reuse communications |
| 06/19/1991 | WO1991009433A1 Broadband circular phased array antenna |
| 06/19/1991 | EP0432647A2 Mobile antenna system |
| 06/19/1991 | CN2079360U Controllor for remote antenna rotary positioning |
| 06/19/1991 | CN1052397A Amplify and turning connected in one feeder device for tv antenna |
| 06/19/1991 | CA2068733A1 Broadband circular phased array antenna |
| 06/18/1991 | US5025493 Multi-element antenna system and array signal processing method |
| 06/18/1991 | US5025262 Airborne antenna and a system for mechanically steering an airborne antenna |
| 06/12/1991 | EP0432034A1 Device for spatially selective absorption of electro-magnetic waves for an ultra-high frequency lens |
| 06/12/1991 | CN2078928U Remote-control aerial reverser |
| 06/12/1991 | CA2031872A1 Mobile antenna system |
| 06/11/1991 | US5023634 Antenna system |
| 06/05/1991 | CN1052007A Remote controller for antenna locating and steering |
| 06/04/1991 | US5021801 Antenna switching system |
| 06/04/1991 | US5021800 Two terminal antenna for adaptive arrays |
| 06/04/1991 | US5021793 Phased array antenna method and system for adaptively positioning nulls |
| 06/04/1991 | US5021792 System for determining direction or attitude using GPS satellite signals |
| 06/04/1991 | CA1284632C Apparatus for manipulating radar drive assemblies |
| 05/29/1991 | EP0429170A2 A drive head assembly for a rotary scanner |
| 05/29/1991 | DE3939318A1 Earth station aerial for satellite traffic - is fitted to rotary frame aligning to long aperture axis parallel to satellite path tangent |
| 05/29/1991 | CN1012707B Automatic orientation system of tv antenna |
| 05/28/1991 | US5019833 Portable antenna apparatus for satellite communication |
| 05/28/1991 | US5018407 Polyurethane insert |
| 05/28/1991 | CA1284532C Phase scan antenna array |
| 05/23/1991 | DE4035980A1 Airborne early warning radar system - uses phase controlled antenna mounted in plastic composite bodied pilotless aircraft |
| 05/21/1991 | US5017932 Miniature antenna |
| 05/21/1991 | US5017927 Monopulse phased array antenna with plural transmit-receive module phase shifters |
| 05/21/1991 | CA1284376C Testing of rf diode phase shifters |
| 05/16/1991 | WO1991001620A3 Multi-element antenna system and array signal processing method |
| 05/16/1991 | DE3937294A1 Pivot mounting for satellite receiver - has motor to move satellite dish between positions for astra and copernicus satellites |
| 05/15/1991 | EP0427470A2 Constant beamwidth scanning array |
| 05/15/1991 | EP0427201A2 Satellite beam-forming network system having improved beam shaping |
| 05/14/1991 | US5016018 Aperture synthesized radiometer using digital beamforming techniques |
| 05/08/1991 | DE3521026A1 Phase controlled antenna - has matrix of emitter modules coupled to digital phase shift control stages |
| 05/07/1991 | US5014069 Photoconductive antenna modulator |
| 05/07/1991 | US5013979 Phased frequency steered antenna array |
| 05/07/1991 | CA1283972C Adaptive antenne system for radio waves, especially microwaves |
| 05/02/1991 | DE3223598C1 Adaptive reception antenna system - has compensation loop altering main antenna diagram using controlled weighting elements |
| 04/24/1991 | EP0423972A2 Space fed phased array antenna with dual phase shifter |
| 04/24/1991 | EP0423552A2 Digital beamforming for multiple independent transmit beams |
| 04/24/1991 | EP0423512A2 Phase controlled antenna array for a microwave landing system (MLS) |
| 04/24/1991 | EP0238621B1 Steered-beam satellite communication system |
| 04/24/1991 | CN2075828U Rotary device for tv antenna |
| 04/23/1991 | US5009115 Device for driving in rotation a structure of large diameter particularly an antenna |
| 04/17/1991 | EP0422551A1 Electronically scanned transmitting antenna |
| 04/16/1991 | US5008680 Programmable beam transform and beam steering control system for a phased array radar antenna |
| 04/16/1991 | US5008678 Electronically scanning vehicle radar sensor |
| 04/16/1991 | US5008677 Anti-jamming device for a radar provided with a reflector antenna |
| 04/16/1991 | US5007721 Mechanically rotated Doppler frequency shifter |
| 04/11/1991 | DE3928926C1 Reflector swivelling unit for imaging radiometer - has four coiled springs directly behind torsion bar to limit its loading |
| 04/11/1991 | DE3224546A1 Three=dimensional scanning for radar aerial - carrying out scanning for very small reflecting section in region of top limit angle of elevation swivel |
| 04/09/1991 | US5007105 Portable |
| 04/09/1991 | US5007058 Millimeter wave power generator |
| 04/09/1991 | CA1282879C Beam-forming network |
| 04/03/1991 | EP0420739A1 Feeding device for a multiple beam antenna |
| 03/27/1991 | CN2074059U Full-automatically tracking tv antenna |
| 03/27/1991 | CN1050290A Swaying and indexing device of remote control antenna |
| 03/26/1991 | US5003315 Progressive phase-Rotman-Turner lens feed transmission line network |
| 03/26/1991 | US5003314 Digitally synthesized phase error correcting system |
| 03/20/1991 | EP0417689A2 Phased array antenna with temperature compensating capability |