| 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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| 01/15/1992 | EP0466126A2 Method and apparatus for producing multiple, frequency-addressable scanning beams |
| 01/14/1992 | US5081468 Frequency agile triangular antenna |
| 01/14/1992 | US5081465 Spatially selective device for the absorption of electromagnetic waves, for a microwave lens |
| 01/14/1992 | US5081464 Method and apparatus for producing multiple, frequency-addressable scanning beams |
| 01/14/1992 | US5081463 Method and system for forming desired radiation pattern with array antenna |
| 01/14/1992 | US5081460 Method and apparatus for testing phase shifter modules of a phased array antenna |
| 01/14/1992 | CA1294337C Coaxial transmission-line matrix including in-plane crossover |
| 01/08/1992 | CN2092817U Steering device for remote-control antenna of tv set |
| 01/07/1992 | US5079557 Phased array antenna architecture and related method |
| 01/02/1992 | EP0463950A1 Device for displacement of an element and application for the pointing of the reflector of an antenna |
| 01/01/1992 | CN2092148U Steering amplifier for tv antenna |
| 12/31/1991 | US5077562 Digital beam-forming technique using temporary noise injection |
| 12/31/1991 | US5077560 Automatic drive for a TVRO antenna |
| 12/31/1991 | US5076655 Antenna-fed electro-optic modulator |
| 12/27/1991 | EP0462864A1 Device for feeding radiating elements of an antenna array and its application for an antenna of a landing help system type MLS |
| 12/27/1991 | EP0462699A2 A frequency reuse, phased array antenna system for receivingtwo or more cofrequency wanted signals and suppressing cochannel interference therebetween |
| 12/27/1991 | EP0462273A1 Scanning antenna having multipath resistance |
| 12/26/1991 | WO1991020133A1 Automatic antenna tuning system and method |
| 12/18/1991 | EP0461314A1 Active array element amplitude stabilization |
| 12/18/1991 | CN2091031U Automatic locating telecontroller for outdoor aerial |
| 12/18/1991 | CN1057132A Tv antnna amplifying and rotating colinear device |
| 12/17/1991 | US5073782 Contraband detection system |
| 12/17/1991 | CA1293314C Guidance equipment for microwave landing system |
| 12/11/1991 | EP0247066B1 Arm device |
| 12/11/1991 | CN2090583U Automatic antenna system controller for tv |
| 12/10/1991 | US5072228 Phased array antenna with temperature compensating capability |
| 12/10/1991 | US5072225 Radar sidelobe identification and discrimination system |
| 12/04/1991 | EP0459616A2 Aircraft antenna with correction of errors introduced by a coning of the antenna beam and by aircraft banking |
| 12/04/1991 | EP0459038A1 Adaptive array processor |
| 12/04/1991 | EP0248886B1 High efficiency optical limited scan antenna |
| 12/04/1991 | CN2090113U Super long-range controlled steering enlarge antenna |
| 12/03/1991 | US5070340 Broadband microstrip-fed antenna |
| 11/28/1991 | WO1991018428A1 Planar orientable antenna operating in the microwave band |
| 11/27/1991 | EP0457880A1 Airborne iff antenna with switchable multiple diagrams. |
| 11/26/1991 | US5068833 Dynamic control circuit for multichannel system |
| 11/26/1991 | US5068668 Adaptive polarization combining system |
| 11/21/1991 | EP0457500A2 Dual linear and dual circular polarization antenna |
| 11/19/1991 | US5066956 Azimuth-stacked radar method and apparatus |
| 11/19/1991 | US5065969 Apparatus for mounting an antenna for rotation on a mast |
| 11/13/1991 | EP0456579A1 Plane orientable antenna, functioning in the microwave range |
| 11/13/1991 | EP0456337A2 Radio receiver antenna systems |
| 11/13/1991 | EP0456034A2 Bicone antenna with hemispherical beam |
| 11/12/1991 | US5065162 Communication system for helicopter |
| 11/07/1991 | DE4014320A1 Iterative calibration of phased-array landing navigational aid |
| 11/05/1991 | US5063529 Method for calibrating a phased array antenna |
| 11/05/1991 | US5063390 Non-dispersive acoustic transport time delay beam steering antenna |
| 11/05/1991 | US5063389 Antenna system with adjustable beam width and beam orientation |
| 10/30/1991 | CN1055836A Method of and apparatus for automatically calibrating phased-array antenna |
| 10/29/1991 | US5061937 Array antenna apparatus |
| 10/29/1991 | US5061936 Attitude control system for mobile antenna |
| 10/29/1991 | CA1291348C Drive and locking device |
| 10/23/1991 | EP0452970A2 Antenna beam pointing method for satellite mobile communications system |
| 10/23/1991 | EP0452799A1 Method and apparatus for the automatic calibration of a "phased array" antenna |
| 10/17/1991 | DE4012101A1 Signal acquisition with phased controlled group antennae - using integral waveguide with Fourier transformation in conjunction with discrete Hilbert transformation |
| 10/16/1991 | EP0451497A1 Method for forming the radiation pattern of an active antenna for radar with electronic scanning, and antenna using this method |
| 10/16/1991 | EP0451322A2 Dynamic control circuit for multichannel system |
| 10/16/1991 | CN1055449A Amplifying and steering party-line device of television antenna |
| 10/15/1991 | CA1290847C Vehicle antenna with shiftable gain patterns |
| 10/02/1991 | EP0449158A2 Fine pointing system of a reflector type focussing antenna |
| 10/02/1991 | EP0449155A2 Satellite antenna tracking system |
| 10/02/1991 | DE4008805A1 Radar system with transmit and reception aerials - one of which has circular diagram, rotating in azimuth, and reduced performance slot |
| 10/02/1991 | CN2086006U Omnidirectional aerial |
| 10/02/1991 | CN2086005U Direction controller for tv aerial |
| 10/01/1991 | US5053784 Apparatus and method for measuring the azimuth and elevation of an object |
| 09/26/1991 | DE4009049A1 Adjustment for antenna of aircraft system - has screw adjustment of sub-reflector relative to main reflector |
| 09/25/1991 | EP0448318A2 Array antenna system structure |
| 09/25/1991 | CN2085568U Telecontrol indoor tv aerial |
| 09/25/1991 | CN1054853A Quincuncial omnidirectional receiving antenna for tv |
| 09/24/1991 | US5051754 Optoelectronic wide bandwidth photonic beamsteering phased array |
| 09/24/1991 | US5051748 Device for transmitting and receiving microwave radiation, for forming images of buried objects |
| 09/19/1991 | WO1991014196A1 Device for producing optical delays and application to an optical control system of a sweep aerial |
| 09/18/1991 | EP0446610A1 Magnified phased array with a digital beamforming network |
| 09/18/1991 | CN2085097U Disk-type full-range indoor tv. receiving antenna |
| 09/18/1991 | CN2085096U Bidirectional full-range plate antenna |
| 09/17/1991 | US5049893 Microwave energy distributor capable of radiating directly |
| 09/17/1991 | US5049891 Radome-antenna installation with rotating equipment rack |
| 09/17/1991 | US5049890 Sampled data processing |
| 09/11/1991 | EP0445795A2 Forward looking radar |
| 09/11/1991 | EP0445794A2 Forward-looking radar |
| 09/11/1991 | EP0445694A1 Active printed circuit antenna system having high efficiency for a scanning radar for operation in space |
| 09/10/1991 | US5048116 Signal routing system |
| 09/10/1991 | US5047785 Split-phase technique for eliminating pattern nulls from a discrete guard antenna array |
| 09/10/1991 | US5047783 Millimeter-wave imaging system |
| 09/10/1991 | US5047674 Gallium arsenide antenna switch having voltage multiplier bias circuit |
| 09/10/1991 | CA1288863C Wideband adaptive array using the chirp transform |
| 09/05/1991 | WO1991009323A3 Detection device |
| 09/04/1991 | CN2084233U Rotary receiving outdoor aerial for tv |
| 09/03/1991 | US5045858 Sidelobe identification and discrimination system with signal multiplexer-separator |
| 09/03/1991 | CA1288480C Satellite communications system employing frequency reuse |
| 08/29/1991 | DE4005557A1 Fibre=optic intensity modulator - uses light conductor is of D=shaped cross=section with optically active material on its flat surface |
| 08/28/1991 | EP0443786A2 Multiple-beam energy transmission system |
| 08/28/1991 | CN2083789U Foldable satellite communication antenna |
| 08/21/1991 | EP0442797A1 Circuit for switching a microwave output signal towards a first or a second output port |
| 08/21/1991 | EP0442562A1 Antenna system with adjustable beam width and beam orientation |
| 08/21/1991 | CN2083343U Orientation memory of tv aerial |
| 08/20/1991 | US5042086 Method and means for transmitting large dynamic analog signals in optical fiber systems |
| 08/20/1991 | US5041836 Self-steered antenna system |
| 08/20/1991 | US5041835 Electronic scanning type array antenna device |
| 08/20/1991 | US5041834 Artificial ionospheric mirror composed of a plasma layer which can be tilted |
| 08/17/1991 | CA2036130A1 Circuit for surtching a microwave signal to one of two outputs |