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Class Information
Number: 342/363
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Including polarized signal communication transmitter or receiver > Receiver only > Circular
Description: Subject matter including the simultaneous transmission of vertically and horizontally polarized radio waves, such that a vector representing the waves has a constant magnitude and varies continuously about a point.

Patents under this class:

Patent Number Title Of Patent Date Issued
8648766 Dual circularly polarized antenna Feb. 11, 2014
8605807 Communicating distinct data over a single frequency using multiple linear polarized signals Dec. 10, 2013
8264405 Methods and apparatus for radiator for multiple circular polarization Sep. 11, 2012
8049666 Regional positioning method and apparatus in wireless sensor network Nov. 1, 2011
7990307 Integrity monitor antenna systems for GPS-based precision landing system verification Aug. 2, 2011
7596354 Optimizing polarization of forward link Sep. 29, 2009
7262729 Radio detection and ranging intrusion detection system Aug. 28, 2007
RE39303 Distribution of a large number of live television programs to individual passengers in an aircraft Sep. 19, 2006
6937643 ROM-based PN generation for wireless communication Aug. 30, 2005
6844849 Circular superdirective receive antenna arrays Jan. 18, 2005
6816735 Method and system for facilitating location-based services Nov. 9, 2004
6580391 Antenna alignment system and method Jun. 17, 2003
6570536 Communications system May. 27, 2003
6535801 Method and apparatus for accurately determining the position of satellites in geosynchronous orbits Mar. 18, 2003
6486828 Adaptive array antenna nulling Nov. 26, 2002
6351237 Polarization and angular diversity among antenna beams Feb. 26, 2002
6339712 Method and device for radio communication Jan. 15, 2002
6275186 Device and method for locating a mobile station in a mobile communication system Aug. 14, 2001
6271790 Communication system Aug. 7, 2001
6252546 Method and apparatus for processing multipath reflection effects in timing systems Jun. 26, 2001
6208307 Aircraft in-flight entertainment system having wideband antenna steering and associated methods Mar. 27, 2001
6175327 GPS receivers with adaptive antenna systems for suppressing interference signals Jan. 16, 2001
6154173 Method and apparatus for processing multipath reflection effects in timing systems Nov. 28, 2000
6018316 Multiple beam antenna system and method Jan. 25, 2000
5995044 Method and apparatus for characterizing multipath interference in circularly polarized signals Nov. 30, 1999
5978652 Common direct broadcasting service system Nov. 2, 1999
5926133 Differentially corrected position location system and method for mobile communication networks Jul. 20, 1999
5842135 Short wave transmission method and apparatus therefor Nov. 24, 1998
5801751 Distribution of satellite television programs to passengers in an aircraft when it is out of range of the satellites Sep. 1, 1998
5796365 Method and apparatus for tracking a moving object Aug. 18, 1998
5790175 Aircraft satellite television system for distributing television programming derived from direct broadcast satellites Aug. 4, 1998
5760819 Distribution of a large number of live television programs to individual passengers in an aircraft Jun. 2, 1998
5717406 Enhanced position calculation Feb. 10, 1998
5691727 Adaptive polarization diversity system Nov. 25, 1997
5410318 Simplified wide-band autotrack traveling wave coupler Apr. 25, 1995
5298908 Interference nulling system for antennas Mar. 29, 1994
5027123 Adaptive interference canceller Jun. 25, 1991
4868917 Radar arrangements Sep. 19, 1989
4853702 Radio wave receiving system Aug. 1, 1989
4626858 Antenna system Dec. 2, 1986
4443800 Polarization control element for phased array antennas Apr. 17, 1984
4309706 Wideband direction-finding system Jan. 5, 1982
4308541 Antenna feed system for receiving circular polarization and transmitting linear polarization Dec. 29, 1981
4295140 Faraday rotation measurement method and apparatus Oct. 13, 1981
3988732 3-Channel selectable polarization, target discrimination antenna Oct. 26, 1976

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