Patents
Sitemap › H01 - Basic electric elements › H01Q - Aerials › H01Q 25 - Aerials or aerial systems providing at least two radiating patterns
Patents for H01Q 25 - Aerials or aerial systems providing at least two radiating patterns (4,128)
07/1990
07/04/1990CN1008675B Wave-packet shaping network
07/03/1990US4939523 Aircraft radar antenna
06/1990
06/26/1990US4937585 Microwave circuit module, such as an antenna, and method of making same
06/26/1990US4937584 Adaptive phase-shifter nulling techniques for large-aperture phases arrays
06/13/1990CN1008417B Selective screen with the characteristics of quick change and transition
06/12/1990US4933680 Microstrip antenna system with multiple frequency elements
06/06/1990EP0371494A2 Mode coupler for monopulse applications
05/1990
05/31/1990WO1990006003A1 Radar system for determining angular position utilizing a linear phased array antenna
05/31/1990DE3933682A1 Multiple receiver aerial for satellites - has hollow dish shape with hollow mirror and several receiver modules at all focal points
05/29/1990US4929959 Dual-polarized printed circuit antenna having its elements capacitively coupled to feedlines
05/29/1990US4929955 Circular waveguide amplitude commutator
05/17/1990WO1990005314A1 Improvements in the transmission and reception of electric signals carrying information
05/16/1990EP0368545A1 Improvements in the transmission and reception of electric signals carrying information
05/15/1990US4926189 High-gain single- and dual-polarized antennas employing gridded printed-circuit elements
05/09/1990EP0367656A1 System for the integration of IFF sum and difference channels in an antenna of a surveillance radar
05/08/1990US4924234 Plural level beam-forming network
05/03/1990CA2001495A1 Transmission and reception of electric signals carrying information
05/02/1990CN1007862B Satellite communication system with high-gain down-beam of frequency addressing
05/01/1990US4922257 Conformal array antenna
04/1990
04/17/1990US4918749 Receiving configuration for microwave signals
04/04/1990EP0361417A2 Microstrip antenna system with multiple frequency elements
04/03/1990US4914443 Angle diversity signal separator using mode conversion
03/1990
03/28/1990CN1007396B Satellite communication system of using frequency-division multiplex
03/27/1990US4912479 Microwave landing system
03/27/1990US4912477 Radar system for determining angular position utilizing a linear phased array antenna
03/06/1990US4907010 Directionally sensitive receiving antenna employing gyrotropic material
02/1990
02/28/1990EP0355898A1 A planar array antenna, comprising coplanar waveguide printed feed lines cooperating with apertures in a ground plane
02/15/1990DE3827589A1 Verfahren und einrichtung fuer die simultane erzeugung von mehreren in echtzeit steuerbaren antennendiagrammen Method and device for the simultaneous generation of multiple controllable in real-time antenna diagrams
02/06/1990US4899163 Microwave plate antenna in particular for Doppler radar
01/1990
01/31/1990EP0352976A2 Angle diversity signal separator using mode conversion
01/30/1990CA1265236A1 Beam forming antenna system
01/09/1990US4893126 Integrated millimeter-wave transceiver
01/03/1990EP0349069A1 Dual polarised phased array antenna
12/1989
12/27/1989CN1038378A Antenna device and method for controlling its postures
12/13/1989EP0345768A2 Antenna reconfigurable with respect to frequency, coverage and polarisation
12/12/1989US4887090 Vehicle antenna with shiftable gain patterns
12/06/1989CN1006030B Antenna system for hybrid-type communication satallite
11/1989
11/29/1989EP0343823A1 Method for stabilizing an electronically steered monopulse antenna
11/21/1989US4882588 Steerable beam antenna system using butler matrix
11/21/1989US4882587 Electronically roll stabilized and reconfigurable active array system
11/21/1989CA1263180A1 Linearly polarized grid reflector antenna systems with improved cross-polarization performance
11/15/1989EP0342175A2 Dual-polarized printed circuit antenna having its elements, including gridded printed circuit elements, capacitively coupled to feedlines
11/08/1989EP0340429A1 Electronically scanned antenna
11/07/1989US4879711 Satellite communications system employing frequency reuse
10/1989
10/31/1989US4878060 Microwave plane antenna with suspended substrate system of lines and method for manufacturing a component
10/31/1989CA1262574A1 Microstrip antenna compressed feed
10/31/1989CA1262573A1 Microstrip antenna bulk load
10/25/1989CN1036668A Antenna which is electronically reconfigurable in transmission
10/03/1989US4872020 Slot antenna in circular waveguide
09/1989
09/20/1989EP0333166A1 Electronically reconformable transmitting antenna
09/19/1989US4868886 Combined global/spot beam configuration for satellite communications
09/06/1989EP0331248A1 Antenna system with adjustable beam width and beam orientation
09/06/1989EP0330699A1 Microwave circuit module, such as an antenna, and method of making same
09/05/1989US4864319 Radio frequency antenna with small cross-section
09/05/1989US4864311 Beam forming network
08/1989
08/22/1989CA1258708A1 Multidirectional feed and flush-mounted surface wave antenna
08/22/1989CA1258707A1 Antenna system
08/17/1989DE3803779A1 Radar antenna
08/15/1989US4858229 Filter interconnection matrix
08/15/1989US4857937 Data element position indication
08/08/1989US4855751 High-efficiency multibeam antenna
07/1989
07/26/1989EP0325034A2 Antenna Array
07/18/1989US4849761 Multi-mode feed system for a monopulse antenna
07/04/1989US4845507 Modular multibeam radio frequency array antenna system
07/04/1989US4845506 Antenna system
06/1989
06/21/1989EP0320675A2 Compact dual series waveguide feed
06/06/1989US4837577 Method for stabilizing an electronically steered monopulse antenna
05/1989
05/24/1989DE3738705A1 Arrangement for varying the lobe width of a microwave antenna
05/17/1989CN2037876U All-direction tv receiver antenna
05/16/1989US4831619 Satellite communications system having multiple downlink beams powered by pooled transmitters
05/09/1989US4829314 Microwave plane antenna simultaneously receiving two polarizations
05/03/1989EP0313636A1 Technique for roll stabilization and partitioning of phased array antenna receiving apertures.
05/03/1989EP0313623A1 Microwave lens and array antenna
05/02/1989US4827270 Antenna device
05/02/1989US4827268 Beam-forming network
04/1989
04/26/1989EP0313057A2 Dual mode phased array antenna system
04/25/1989US4825219 Slot antenna in circular waveguide
04/19/1989EP0311928A2 Antenna array
04/19/1989EP0311919A2 Satellite communications system employing frequency reuse
04/18/1989US4823341 Satellite communications system having frequency addressable high gain downlink beams
04/18/1989US4823143 Intersecting shared aperture antenna reflectors
04/18/1989CA1252857A1 Interference canceler with difference beam
04/04/1989US4819227 Satellite communications system employing frequency reuse
04/04/1989US4818958 Processes sum and difference signals
04/04/1989CA1252195A1 Electronic tracking system for microwave antennas
03/1989
03/29/1989EP0309039A2 Integrated millimetre-wave transceiver
03/28/1989US4816835 Planar antenna with patch elements
03/23/1989WO1989002662A1 Microwave circuit module, such as an antenna, and method of making same
03/22/1989EP0307445A1 Plural level beam-forming network.
03/21/1989US4814777 Dual-polarization, omni-directional antenna system
03/21/1989US4814775 Reconfigurable beam-forming network that provides in-phase power to each region
03/15/1989EP0307338A1 Microwave plate antenna, especially for a Doppler radar
01/1989
01/25/1989EP0300024A1 Slot antenna in circular waveguide.
12/1988
12/27/1988US4794400 Angular-diversity radiating system for tropospheric-scatter radio links
12/20/1988US4792813 Antenna system for hybrid communications satellite
12/20/1988US4792805 Multifunction active array
12/14/1988EP0294413A1 Steerable beam antenna system using butler matrix.
12/13/1988US4791429 Multimode omniantenna with flush mount
12/07/1988EP0293429A1 Composite antenna reflector with polarized subreflector
11/1988
11/29/1988CA1245759A1 Dual gridded reflector structure
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