Patents
Patents for H01Q 25 - Aerials or aerial systems providing at least two radiating patterns (4,128)
08/1993
08/03/1993US5233359 Low difference pattern sidelobe pattern circuit
07/1993
07/28/1993EP0289553B1 Monopulse antenna with improved sidelobe suppression
07/21/1993EP0290508B1 Orthogonal mode electromagnetic wave launcher
07/06/1993US5225839 All weather tactical strike system (AWTSS) and method of operation
06/1993
06/29/1993US5223850 Low-profile full aperture monopulse antenna assembly
06/29/1993US5223846 Multiple-beam transmission system
06/23/1993EP0547800A1 Monopulse tracking apparatus
06/22/1993US5221909 Active load biasing circuit
06/10/1993WO1993011582A1 Compact broadband microstrip antenna
06/09/1993EP0545873A2 A waveguide antenna which includes a slotted hollow waveguide
06/03/1993DE4139102A1 Reflective antenna system with correction of comatic lobe - has secondary excitation stage providing phases shift to suppress comatic lobe
06/02/1993EP0544081A1 Monopulse antenna with improved sidelobe suppression
06/01/1993US5216428 Modular constrained feed for low sidelobe array
05/1993
05/26/1993EP0313636B1 Technique for roll stabilization and partitioning of phased array antenna receiving apertures
05/19/1993EP0542440A1 Processing method for antenna patterns
05/13/1993WO1993009614A1 Beam compensation methods for satellite communication system
05/13/1993WO1993009613A1 Satellite communication system
05/13/1993WO1993009578A1 Spacecraft antennas and beam steering methods for satellite communication system
05/13/1993CA2121587A1 Satellite communication system
05/13/1993CA2121350A1 Spacecraft antennas and beam steering methods for satellite communication system
05/13/1993CA2121349A1 Beam compensation methods for satellite communication system
05/11/1993US5210541 Microstrip patch antenna arrays
05/05/1993EP0540249A1 Processing method for antenna patterns
04/1993
04/27/1993US5206658 Multiple beam antenna system
04/13/1993US5202700 Array fed reflector antenna for transmitting & receiving multiple beams
04/06/1993US5200755 Bistatic radar system
03/1993
03/02/1993US5191349 Apparatus and method for an amplitude monopulse directional antenna
02/1993
02/23/1993US5189434 Multi-mode antenna system having plural radiators coupled via hybrid circuit modules
02/04/1993WO1993002486A1 Multibeam lens antenna
01/1993
01/20/1993EP0524001A1 Multi-port microwave coupler
01/20/1993EP0524000A1 Multi-port microwave coupler
01/19/1993CA2073793A1 Multi-port microwave coupler
01/13/1993EP0278982B1 Filter interconnection matrix
12/1992
12/16/1992EP0518663A2 Primary horn for parabolic-reflector antenna
12/09/1992EP0517352A1 A power distribution network for array antennas
12/06/1992CA2064345A1 Power distribution network for array antennas
12/02/1992EP0516039A1 Communication system by means of satellites in low orbit to mobile stations
11/1992
11/19/1992EP0513856A2 Use of a transmit signal amplifying apparatus, transmit subsystem and method for amplifying transmit signals
11/17/1992US5164738 Wideband dual-polarized multi-mode antenna
11/03/1992CA1309769C Dual polarization electromagnetic power reception and conversion system
10/1992
10/27/1992CA1309491C Microwave plate antenna in particular for doppler radar
10/20/1992CA1309172C Dual mode phased array antenna system
10/14/1992CN1018686B Antenna which is electronically reconfigurable in transmission
09/1992
09/29/1992US5151706 Apparatus for electronically controlling the radiation pattern of an antenna having one or more beams of variable width and/or direction
09/23/1992EP0504552A1 Multi-mode beam forming networks for multi beam reflector antenna
09/22/1992CA1307842C Dual polarization microstrip array antenna
09/09/1992EP0277173B1 Satellite communications system having frequency addressable high gain downlink beams
09/08/1992US5146234 Dual polarized spiral antenna
09/02/1992EP0312588B1 Multifunction active array
09/02/1992CN2114899U Dual-direction tv antenna
09/02/1992CN1064177A 天线系统 Antenna System
08/1992
08/26/1992EP0277205B1 Satellite communications system employing frequency reuse
08/26/1992EP0277188B1 Satellite communications system having multiple downlink beams powered by pooled transmitters
08/12/1992CN1017847B Quincuncial omnidirectional receiving antenna for tv
08/11/1992US5138324 Device to measure the elevation angle for a radar equipped with a double curvature reflective type antenna
08/06/1992WO1992013373A1 Antenna system
08/05/1992EP0497652A1 Device for the electronic control of the radiation pattern of a single or multi beam antenna with variable direction and/or width
08/05/1992CN2112210U All frequency channel omnidirectional tv antenna
08/04/1992US5136294 Multibeam antenna
08/04/1992US5136271 Microwave integrated circuit mountings
07/1992
07/28/1992US5134417 Plural frequency matrix multiplexer
07/21/1992US5132694 Multiple-beam array antenna
07/14/1992US5130715 Method of managing beams formed by phased array antennas and apparatus therefor
07/07/1992US5128687 Shared aperture antenna for independently steered, multiple simultaneous beams
07/07/1992US5128682 Directional transmit/receive system for electromagnetic radiation with reduced switching
07/07/1992CA1304816C Multimode omni antenna with flush mount
06/1992
06/10/1992EP0277984B1 Beam-forming network
06/03/1992EP0488101A1 Reconfigurable multibeam antenna
05/1992
05/30/1992CA2056774A1 Reconfigurable transmission antenna
05/19/1992US5115248 Multibeam antenna feed device
05/19/1992CA1301311C Plural level beam-forming network
05/12/1992US5113197 Conformal aperture feed array for a multiple beam antenna
05/06/1992EP0484241A1 Printed circuit antenna for a dual polarized antenna array
05/06/1992EP0483686A1 Multiple beam antenna system
04/1992
04/29/1992EP0482756A2 Wideband dual polarized multi-mode antenna
04/28/1992US5109232 Dual frequency antenna feed with apertured channel
04/08/1992EP0479696A1 Microwave plate antenna, especially for Doppler radar
04/07/1992CA1298651C Electronic scanning antenna
04/07/1992CA1298650C Transmit mode electronic reconfiguration antenna
04/01/1992EP0300024B1 Slot antenna in circular waveguide
03/1992
03/24/1992US5099253 Constant beamwidth scanning array
03/24/1992CA1297971C Multifunction active array
03/04/1992CN2098093U Two-direction folding fan all-frequency channel antenna for tv
03/03/1992US5093668 Multiple-beam array antenna
03/03/1992US5093666 Lobing system
02/1992
02/25/1992CA1296422C Multibeam antenna
02/11/1992CA1295731C Steerable beam antenna system using butler matrix
01/1992
01/29/1992EP0468662A2 Plural frequency matrix multiplexer
01/22/1992EP0467738A1 Azimuth angle measuring device for a radar provided with a double curvature reflective-type antenna
01/21/1992CA2047032A1 Elevation angle measuring device for a radar equipped with a double curvature type reflector antenna
01/15/1992EP0466579A1 Double reflector with grids
01/15/1992EP0466126A2 Method and apparatus for producing multiple, frequency-addressable scanning beams
01/14/1992US5081464 Method and apparatus for producing multiple, frequency-addressable scanning beams
01/07/1992CA1294004C Angle diversity signal separator using mode conversion
11/1991
11/21/1991EP0457500A2 Dual linear and dual circular polarization antenna
11/21/1991EP0456680A1 Antenna arrays.
11/19/1991US5066959 Mode coupler for monopulse applications having h01 mode extracting means
11/05/1991US5063389 Antenna system with adjustable beam width and beam orientation
10/1991
10/31/1991DE4013165A1 Array antenna using microstrip line techniques - has individual radiator elements on either side of symmetrical supply network
10/29/1991US5061943 Planar array antenna, comprising coplanar waveguide printed feed lines cooperating with apertures in a ground plane
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