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Class Information
Number: 342/434
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Beacon or receiver > Direction-finding receiver only > With plural fixed antenna pattern comparing > Successively commutated > Including more than two antennas
Description: Subject matter wherein more than two antennas are connected in sequence.










Patents under this class:

Patent Number Title Of Patent Date Issued
8664807 Planar tri-mode cavity Mar. 4, 2014
8185162 Electrically tilted antenna system with polarisation diversity May. 22, 2012
8009099 System and methods for direction finding using a handheld device Aug. 30, 2011
7613482 Method and system for steering antenna beam Nov. 3, 2009
7603141 Multi-antenna station with distributed antennas Oct. 13, 2009
7508875 Correlation matrix estimation via adaptive array perturbational processing to enable jammer location Mar. 24, 2009
7477192 Direction finding system and method Jan. 13, 2009
7092673 Angle of arrival estimation in a wireless telecommunications network Aug. 15, 2006
6954176 Device and method for an antenna array with switchable wide-angle coverage Oct. 11, 2005
6907270 Method and apparatus for reduced rank channel estimation in a communications system Jun. 14, 2005
6661378 Active high density multi-element directional antenna system Dec. 9, 2003
6271791 Radio-signal direction finding Aug. 7, 2001
6195559 Communication system, a primary radio station, a secondary radio station, and a communication method Feb. 27, 2001
5617102 Communications transceiver using an adaptive directional antenna Apr. 1, 1997
5122808 Phase only bearing mesurement with amiguity correction in a collision avoidance system Jun. 16, 1992
5075696 Direction finding apparatus Dec. 24, 1991
5053784 Apparatus and method for measuring the azimuth and elevation of an object Oct. 1, 1991
5032844 Sky wave direction finder Jul. 16, 1991
4929955 Circular waveguide amplitude commutator May. 29, 1990
H710 Horizon reference system for a rotating body Nov. 7, 1989
4724442 Method and apparatus for loop direction finding with no ambiguity Feb. 9, 1988
4719469 Direction-determining system Jan. 12, 1988
4658257 Radar system Apr. 14, 1987
4644358 Stem orientation measurement apparatus Feb. 17, 1987
4639733 Direction finding Jan. 27, 1987
4636796 Radio direction finding system Jan. 13, 1987
4481519 Radio frequency signal direction finding apparatus Nov. 6, 1984
4356496 Loop-coupler commutating feed for scanning a circular array antenna Oct. 26, 1982
4317120 Sector scan ADF system Feb. 23, 1982
4263597 Nondisruptive ADF system Apr. 21, 1981
4257047 Method and apparatus for electrically scanning an antenna array in a monopulse DF radar system Mar. 17, 1981
4216476 Digital electronic commutator for radio direction finding system Aug. 5, 1980
4207572 Sky wave DF antenna system Jun. 10, 1980
4194207 Radiolocation system for determining the direction of incident electromagnetic waves Mar. 18, 1980
4107692 Radio frequency signal direction finding system Aug. 15, 1978
4062015 Rapid azimuthal determination of radio signals Dec. 6, 1977
3967280 Direction finding system with integrated loop and sense antenna assembly Jun. 29, 1976
3965473 Direction finders Jun. 22, 1976











 
 
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