| 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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| 09/12/1990 | EP0387169A1 Driving device for the rotation of a structure with a large diameter, in particular an antenna |
| 09/12/1990 | EP0386224A1 Data processing system for a phased array antenna |
| 09/11/1990 | US4956643 Transponder with selective antenna beam using shared antenna feed elements |
| 09/04/1990 | US4954834 Movable optical fiber system for directing microwaves |
| 09/04/1990 | US4954832 Apparatus for simultaneously rotating a plurality of parallel shafts |
| 09/04/1990 | US4953422 Compound angle limiting device |
| 08/30/1990 | DE3906067A1 Method for positioning a radar antenna |
| 08/29/1990 | EP0384021A1 Antenna system having azimuth rotating directive beam with selectable polarization |
| 08/22/1990 | EP0383657A1 Antenna system for the reception of direct broadcast satellite (DBS) emissions |
| 08/22/1990 | CN2060949U Auto-reverse linkage system of tv aerials |
| 08/21/1990 | US4951061 Two dimensional acousto-optic signal processor using circular antenna array and a butler matrix |
| 08/17/1990 | CA2010255A1 Antenna system for reception from direct broadcasting satellites |
| 08/16/1990 | EP0267184B1 Improvements in or relating to a transceiver interference cancellation system |
| 08/15/1990 | CN2060599U A.c safety remote-control rotary antenna |
| 08/15/1990 | CN2060598U Antenna line-controlled locator with replaceable motor |
| 08/14/1990 | US4949093 Compact antenna range with switchable electromagnetic mirror |
| 08/14/1990 | US4949090 Transmit/receive module test system |
| 08/09/1990 | DE3902739A1 Radar antenna array |
| 08/08/1990 | EP0380914A2 Antenna system |
| 08/07/1990 | US4947182 Method of feeding electromagnetic power from an antenna element |
| 08/07/1990 | US4947178 Scanning antenna |
| 08/02/1990 | DE3902633A1 Covering device for a chimney opening |
| 08/01/1990 | CN2060014U Controller for preselecting aerial direction |
| 07/18/1990 | CN1008858B Portable antenna device for satellite communucation |
| 07/17/1990 | US4942403 Phased-array radar |
| 07/12/1990 | WO1990007802A1 Self-adaptive directional filtering and polarisation device for radioelectric waves |
| 07/05/1990 | DE3938512A1 Indoor television aerial |
| 07/04/1990 | EP0376701A2 Flat-plate patch antenna |
| 07/04/1990 | CN1008675B Wave-packet shaping network |
| 07/03/1990 | US4939791 Diversity radio receiver for use with multiple antenna, particularly car radio |
| 07/03/1990 | US4939526 Antenna system having azimuth rotating directive beam with selectable polarization |
| 06/30/1990 | CA2006494A1 Auto-adaptive direction and polarization filtering device for radio waves received by an antenna array coupled to a receiver |
| 06/28/1990 | WO1990007130A1 Millimiter-wave imaging system, particularly for contraband detection |
| 06/27/1990 | EP0374722A1 Directional antenna having an adaptively controlled subreflector |
| 06/26/1990 | US4937587 Low profile scanning antenna |
| 06/26/1990 | US4937585 Microwave circuit module, such as an antenna, and method of making same |
| 06/26/1990 | US4937584 Adaptive phase-shifter nulling techniques for large-aperture phases arrays |
| 06/22/1990 | CA2004724A1 Antenna system having azimuth rotating directive beam with selectable polarization |
| 06/12/1990 | US4933682 Point to point microwave communication service antenna pattern with anull in an interering direction |
| 06/12/1990 | US4933681 Radar antenna of small overall dimensions |
| 06/12/1990 | US4933680 Microstrip antenna system with multiple frequency elements |
| 06/06/1990 | EP0371133A1 Holographic radar |
| 06/05/1990 | US4931977 Vectorial adaptive filtering apparatus with convergence rate independent of signal parameters |
| 06/05/1990 | US4931976 Temperature compensated side lobe suppression |
| 06/05/1990 | US4931803 Electronically steered phased array radar antenna |
| 05/31/1990 | WO1990006003A1 Radar system for determining angular position utilizing a linear phased array antenna |
| 05/31/1990 | DE3839945A1 Phased antenna array |
| 05/30/1990 | EP0211075B1 Apparatus for simultaneously rotating a plurality of parallel shafts |
| 05/29/1990 | US4929956 Optical beam former for high frequency antenna arrays |
| 05/29/1990 | US4929955 Circular waveguide amplitude commutator |
| 05/29/1990 | CA1269750A1 Phase shifter control |
| 05/22/1990 | US4928109 Modulated scanning antenna |
| 05/17/1990 | WO1990005391A1 Phased array antenna |
| 05/16/1990 | EP0368121A1 Electronically scanned antenna |
| 05/15/1990 | US4926186 FFT-based aperture monitor for scanning phased arrays |
| 05/09/1990 | EP0367167A2 Method and system for reducing phase error in a phased array radar beam steering controller |
| 05/08/1990 | US4924239 Antenna mounting apparatus |
| 05/08/1990 | US4924235 Holographic radar |
| 05/08/1990 | US4924234 Plural level beam-forming network |
| 05/08/1990 | US4924232 Method and system for reducing phase error in a phased array radar beam steering controller |
| 05/08/1990 | CA1268854A1 Method and apparatus for aligning a directional antenna to receive signals from one or more geostationary satellites |
| 05/02/1990 | CN1007861B Antenna diversity reception system for eliminating interference |
| 05/01/1990 | US4922257 Conformal array antenna |
| 04/30/1990 | CA2001922A1 Phased array antenna |
| 04/24/1990 | US4920350 Satellite tracking antenna system |
| 04/24/1990 | US4920349 Antenna mounting with passive stabilization |
| 04/24/1990 | CA1268249A1 Wide sweep antenna mounted on a satellite and equipped with a main reflector and fixed sources, especially for microwave operation |
| 04/18/1990 | EP0363841A2 Plural layer coupling system |
| 04/18/1990 | CN1041484A Automactic orientation system of tv antenna |
| 04/17/1990 | US4918565 Electrical surge suppressor |
| 04/17/1990 | US4918458 Secondary radar transponder |
| 04/17/1990 | US4918363 Actuator for TVRO parabolic antenna |
| 04/11/1990 | CN2055989U U/v all channel indoor tv receiving antenna |
| 04/10/1990 | US4916460 Distributed antenna system |
| 04/10/1990 | US4916454 Adaptive nulling circular array antenna |
| 04/10/1990 | US4916453 Spatial filtering system |
| 04/04/1990 | EP0362165A1 Method of feeding electromagnetic power from an antenna element |
| 04/04/1990 | EP0361885A2 Satellite antenna alignment system |
| 04/04/1990 | EP0361417A2 Microstrip antenna system with multiple frequency elements |
| 04/04/1990 | CN2055643U Multifunction adjusting locking device for telescopic antenna |
| 03/28/1990 | CN1007396B Satellite communication system of using frequency-division multiplex |
| 03/27/1990 | US4912480 Offset phase-center antenna for aircraft landing system |
| 03/27/1990 | US4912479 Microwave landing system |
| 03/27/1990 | US4912478 Signal time delay magnetostatic spin wave device for phased array antennas |
| 03/27/1990 | US4912477 Radar system for determining angular position utilizing a linear phased array antenna |
| 03/27/1990 | US4912476 Antenna interface common module |
| 03/27/1990 | US4912474 Radar apparatus for realizing a radio map of a site |
| 03/22/1990 | WO1990003049A1 Optical beam former for high frequency antenna arrays |
| 03/22/1990 | WO1990002957A1 Data processing system for a phased array antenna |
| 03/21/1990 | EP0359238A2 Array antenna device having IC units with IF conversion circuits for coupling antenna elements and signal combiner |
| 03/14/1990 | EP0357955A1 Diode patch phase shifter |
| 03/07/1990 | EP0357165A2 Phase shift data transfer system for phased array antenna apparatuses |
| 03/07/1990 | CN2054212U Automatic aerial orientation apparatus |
| 03/07/1990 | CN2054211U Aerial rotator |
| 03/07/1990 | CN2054210U Radar type orientation regulator of preselected tv aerial |
| 03/06/1990 | US4907010 Directionally sensitive receiving antenna employing gyrotropic material |
| 03/06/1990 | US4907005 Radiofrequency power distributor for instrument landing system localizer antenna arrays |
| 03/06/1990 | US4907004 Power versatile satellite transmitter |
| 02/28/1990 | CN2053802U Telecast antenna without energy source |
| 02/27/1990 | US4905014 Microwave phasing structures for electromagnetically emulating reflective surfaces and focusing elements of selected geometry |