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Class Information
Number: 342/433
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
Description: Subject matter wherein the receiver is periodically connected to the various antennas in sequence.










Sub-classes under this class:

Class Number Class Name Patents
342/435 By diode switching 15
342/436 By modulation 16
342/434 Including more than two antennas 38


Patents under this class:

Patent Number Title Of Patent Date Issued
8009099 System and methods for direction finding using a handheld device Aug. 30, 2011
7936852 Antenna diversity system for radio reception for motor vehicles May. 3, 2011
7924225 Direction finding antenna systems and methods for use thereof Apr. 12, 2011
7477192 Direction finding system and method Jan. 13, 2009
7233284 Handheld GPS jammer locator Jun. 19, 2007
7013166 Multi-carrier receiver architecture Mar. 14, 2006
7012567 Approach position input device Mar. 14, 2006
6768457 Diversity systems for receiving digital terrestrial and/or satellite radio signals for motor vehicles Jul. 27, 2004
6738609 Receiver and method of receiving May. 18, 2004
5696490 FM (VHF) infrared wireless digital metal detector Dec. 9, 1997
5502449 Ground unit for the detection, identification, and direction determination of a marker beacon Mar. 26, 1996
5426438 Method and apparatus for adaptively determining the bearing angle of a radio frequency signal Jun. 20, 1995
5323167 Antenna configuration and system for determining the direction of a radio frequency signal Jun. 21, 1994
5268695 Differential phase measurement through antenna multiplexing Dec. 7, 1993
5265271 Low battery detector Nov. 23, 1993
5264857 Method and apparatus for signal modulation and detection Nov. 23, 1993
5198823 Passive secondary surveillance radar using signals of remote SSR and multiple antennas switched in synchronism with rotation of SSR beam Mar. 30, 1993
5075695 Method and apparatus for signal modulation and detection Dec. 24, 1991
5010343 Method and device in the antenna and receiving system of a radio theodolite Apr. 23, 1991
4978963 RF signal direction finding apparatus Dec. 18, 1990
4975710 Methods and apparatus for direction of arrival measurement and radio navigation aids Dec. 4, 1990
4920348 Method and apparatus for signal modulation and detection Apr. 24, 1990
4647935 Apparatus for determining the magnitude of phase discontinuities introduced into a received signal at known instants Mar. 3, 1987
4529986 Optical connection system for the bidirectional exchange of data between a central unit and peripheral units and an electronic sweep antenna comprising such a system Jul. 16, 1985
4489327 Direction finding Dec. 18, 1984
4358768 Radio direction finder Nov. 9, 1982
4307402 Direction finder Dec. 22, 1981
4246581 Direction finder Jan. 20, 1981
4220954 Adaptive antenna system employing FM receiver Sep. 2, 1980
4129874 Antenna pattern combiner Dec. 12, 1978
4123759 Phased array antenna Oct. 31, 1978
4107691 Antenna for phase front homing Aug. 15, 1978
4091386 Rear window direction finding antenna May. 23, 1978
4071845 Harbor radio navigation system Jan. 31, 1978











 
 
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