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Class Information
Number: 342/365
Name: Communications: directive radio wave systems and devices (e.g., radar, radio navigation) > Directive > Including polarized signal communication transmitter or receiver > 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
8605807 Communicating distinct data over a single frequency using multiple linear polarized signals Dec. 10, 2013
8098197 System and method for providing hybrid global positioning system/height of burst antenna operation with optimizied radiation patterns Jan. 17, 2012
7986260 Circularly polarized antennas for active holographic imaging through barriers Jul. 26, 2011
7865152 RF waveform modulation apparatus and method Jan. 4, 2011
7262729 Radio detection and ranging intrusion detection system Aug. 28, 2007
6583685 Antenna arrangement Jun. 24, 2003
6570536 Communications system May. 27, 2003
6559796 Method and device for emitting a time signal May. 6, 2003
6441779 System and method of carrier-phase attitude determination Aug. 27, 2002
6351237 Polarization and angular diversity among antenna beams Feb. 26, 2002
6271790 Communication system Aug. 7, 2001
6252546 Method and apparatus for processing multipath reflection effects in timing systems Jun. 26, 2001
6204810 Communications system Mar. 20, 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
6005514 Method for attitude determination using GPS carrier phase measurements from nonaligned antennas Dec. 21, 1999
5995044 Method and apparatus for characterizing multipath interference in circularly polarized signals Nov. 30, 1999
5982326 Active micropatch antenna device and array system Nov. 9, 1999
5903238 Radio station for mobile communication systems and method for the selection of a transmission means May. 11, 1999
5790076 Tracking sensor specially for computer applications Aug. 4, 1998
5504493 Active transmit phased array antenna with amplitude taper Apr. 2, 1996
5434575 Phased array antenna system using polarization phase shifting Jul. 18, 1995
5420597 Farfield simulator for testing autotrack antennas May. 30, 1995
5317323 Passive high accuracy geolocation system and method May. 31, 1994
5027123 Adaptive interference canceller Jun. 25, 1991
4881077 Radar arrangement Nov. 14, 1989
4868917 Radar arrangements Sep. 19, 1989
4811020 Radar protected against rain clutter and method for protecting a radar against rain clutter Mar. 7, 1989
4742354 Radar transceiver employing circularly polarized waveforms May. 3, 1988
4737793 Radio frequency antenna with controllably variable dual orthogonal polarization Apr. 12, 1988
4691205 Beam forming network for circularly polarized shaped beam antenna system Sep. 1, 1987
4630057 Vehicle location system Dec. 16, 1986
4543579 Circular polarization antenna Sep. 24, 1985
4494117 Dual sense, circularly polarized helical antenna Jan. 15, 1985
4443800 Polarization control element for phased array antennas Apr. 17, 1984
4408206 System for transmitting power from a solar satellite to earth and subsequent conversion to a 60 Hertz three phase signal Oct. 4, 1983
4329687 Radar radiating polarized signals May. 11, 1982
4292685 Apparatus and method for controlling crosspolarization of signals in a frequency reuse system Sep. 29, 1981
4217549 Device for two-way information link Aug. 12, 1980
4156874 Anti-collision vehicle radar system May. 29, 1979
4119967 Microwave dual mode non-interfering CW and pulsed signal system method and apparatus Oct. 10, 1978
4117488 Multipurpose, multifunction antenna Sep. 26, 1978
4106015 Radar system with circular polarized transmission and adaptive rain depolarization compensation Aug. 8, 1978
4005414 Method for providing means to eliminate ambiguous polarization effects on phase and amplitude of radar backscatter due to unknown target aspect angle Jan. 25, 1977
3997901 Method of directing an aerial to a receiver according to a main direction Dec. 14, 1976
3956699 Electromagnetic wave communication system with variable polarization May. 11, 1976

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