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Class 342/188 - With polarization


Subclass of Class 342 - Communications: directive radio wave systems and devices (e.g., radar, radio navigation)
Definition: Subject matter including means to polarize the radar signal.
No. of patents: 184
Last issue date: 10/05/2010


1          
NumberTitleIssue Date
7808427Radar system having dual band polarization versatile active electronically scanned lens array
A radar system comprises a first transmit/receive module for a first frequency band and a first polarization, a second transmit/receive module for the first frequency band and a second polarization orthogonal to the first polarization, a third transmit/receive modul...
10/05/2010
7719463Reflectarray and a millimetre wave radar
The reflectarray comprises an array of patch elements (10-13). Each patch element has a cut ring shape formed of a conductive ring with at least one crossing gap. The outer diameter and inner diameter and crossing gap are adjusted so that a phase shift...
05/18/2010
7623064Instantaneous radar polarimetry
A radar system and method that employs polarization-time diversity in transmitting signals and concurrently processing received reflections from both polarization modes provides information about the scattering matrix of a target without loss of information. Illustr...
11/24/2009
7570202Polarimetric selectivity method for suppressing cross-track clutter in sounding radars
Methods for suppressing cross-track clutter in a sounding radar utilize polarimetric selectivity in two ways: (1) transmitting full-beam circular polarization and separating the desired signal of interest from the clutter based on the signal and clutter having diffe...
08/04/2009
7551123Phase shifted transmitted signals in a simultaneous dual polarization weather system
A system for simultaneously propagating dual polarized signals in a polarimetric radar system includes a system for shifting the phase of one of the two signals. The simultaneous dual polarization weather radar transmits signals in both the horizontal and vertical o...
06/23/2009
7515099Radar system having single circularly polarized antenna
A radar system includes a transmitter stage for generating a certain transmission signal; a circularly polarized antenna for emitting the transmission signal in a form of a circularly polarized signal, and receiving a reflection signal; a polarizer for isolating the...
04/07/2009
7439899Encoded transmitted signals in a simultaneous dual polarization weather system
A system for simultaneously propagating dual polarized signals in a polarimetric radar system includes a system for coding at least one of the two signals. The simultaneous dual polarization weather radar transmits signals in both the horizontal and vertical orienta...
10/21/2008
7436351Multipath resolving correlation interferometer direction finding
Apparatus and a method utilizing correlation interferometer direction finding for determining the azimuth and elevation to an aircraft at long range and flying at low altitudes above water with a transmitting radar while resolving multipath signals. The signals from...
10/14/2008
7427945Positioning system with co-polarized and cross-polarized mapping
A local positioning system using co-polarized and cross-polarized radar mapping is provided. In one embodiment of the method, at least a first electromagnetic pulse having a first polarization is transmitted. A first return signal preferentially having the first pol...
09/23/2008
7385552Real-time, cross-correlating millimeter wave imaging system using dual pill-box antennas
A method and apparatus are disclosed for forming an image from millimeter waves. A field of view scanned using two geometrically orthogonal, intersecting copolarized fan beams (110, 120) to receive millimeter wave radiation. The received millimeter wave radia...
06/10/2008
7385551Polarization sensitive synthetic aperture radar system and method for local positioning
A positioning system includes a passive, isotropic reflecting landmark at a fixed position and a device. The device transmits an electromagnetic pulse having a circular polarization and receives a return signal over a period of time. The return signal includes a ref...
06/10/2008
7369082Method and apparatus implementing a scan strategy for automatic high power tube recovery
A method of reducing power to an electron emitting cathode comprises the steps of sensing a weather condition; calculating a condition number based upon the weather condition; comparing the condition number to a threshold; and reducing the power to the electron emit...
05/06/2008
7358891Multipath resolving correlation interferometer direction finding
Apparatus and a method utilizing correlation interferometer direction finding for determining the azimuth and elevation to an aircraft at long range and flying at low altitudes above water with a transmitting radar while resolving multipath signals. The signals from...
04/15/2008
7355546Polarization and frequency diverse radar system for complete polarimetric characterization of scatterers with increased scanning speed
A method and apparatus is provided, whereby a scanning, polarization and frequency diverse radar system measures the complete polarimetric characterization of weather targets without loss of scanning speed and without an additional ambiguity in the Doppler velocity ...
04/08/2008
7345617Apparatus for collecting ground radar data with polarization information
The present invention concerns an apparatus for collecting ground radar data with polarization information comprising a main body exhibiting structure for moving the apparatus along the ground, a part that rotates in relation to the main body supporting a pair of an...
03/18/2008
7345625Radar polarization calibration and correction
A polarimetric radar system transmits a signal which is nominally the desired polarization, but which may deviate therefrom. A calibration operation is performed using a symmetrical radar reflector, to determine the gains and phases of reception of two mutually orth...
03/18/2008
7315275Positioning system with intentional multi-path signal
A positioning system includes a device, having an antenna and a reflector with a known position proximate to the antenna, that transmits at least an electromagnetic pulse having a carrier signal frequency. The device receives a return signal over a period of time, w...
01/01/2008
7304603Radar apparatus and processing method for detecting human carried explosive devices
A linear FM pulse radar with Doppler processing of co-polarized and cross-polarized radar return signals isolates the target echo signal content associated with a moving pedestrian to provide high quality target echo data for standoff HCE detection based on polarime...
12/04/2007
7304601Device and a method for accurate radar level gauging
The invention discloses a device for using radar signals to measure the vertical distance (h) to a surface, comprising a first transmitter and a first transmitting antenna for transmitting radar signals, and a first receiver and a first receiving antenna for receivi...
12/04/2007
7295146Holographic arrays for multi-path imaging artifact reduction
A method and apparatus to remove human features utilizing at least one transmitter transmitting a signal between 200 MHz and 1 THz, the signal having at least one characteristic of elliptical polarization, and at least one receiver receiving the reflection of the si...
11/13/2007
7280848Active array antenna and system for beamforming
An active antenna array for use in a beamforming antenna system. The antenna array includes multicarrier power amplifiers coupled to each antenna element wherein the outputs of the multicarrier power amplifiers are linearized. The antenna array communicates with a b...
10/09/2007
7271763Hybrid-phased communication array
A communication module is provided with a Transmit/Receive (T/R) element fabricated from psuedomorphic HEMT, High Electron Mobility Transistor technology (PHEMT). The T/R element drives multiple Radio Frequency MEMS switch-based phasing elements. Each of the phasing...
09/18/2007
7262729Radio detection and ranging intrusion detection system
A radar system having a processor, a waveform generator, a plurality of antenna interfaces, a set of first antennas configured to transmit a waveform, and a set of second antennas configured to receive a reflected waveform is disclosed. The waveform generator and an...
08/28/2007
7236124Radar system and method for reducing clutter in a high-clutter environment
A radar system transmits an environment-sensing pulse and processing circuitry time-reverses an order of radar return samples and generates a convolution matrix from the radar return samples resulting from a transmission of the environment-sensing pulse. The process...
06/26/2007
7196654Vehicle positioning and tracking radar system
A vehicle positioning and tracking radar system includes a rotating antenna with a pair of spatially separated transmit feeds for simultaneously transmitting a pair of frequency-modulated continuous-wave (FMCW) electromagnetic signals having a first polarisation and...
03/27/2007
7193556System and method for the measurement of full relative position and orientation of objects
A system for measuring a position and orientation of an object in flight relative to a reference coordinate system is provided. The system including: three or more illuminating sources, each disposed in a predefined position, the three or more illuminating sources t...
03/20/2007
7190302Sub-surface radar imaging
Detailed is radar imaging apparatus including a single transmit antenna and at least one receive antenna, scanning apparatus (e.g. a pantograph) for mechanically scanning the antennas over a surface of interest, position providing apparatus (e.g. a computer driving ...
03/13/2007
7173563Calibration method, device and computer program
A method for calibrating parameters of sensor elements in a sensor array. The method comprises receiving an output signal of at least two sensor elements signal in reaction to an input signal from a signal source; estimating a cross-correlation between the output si...
02/06/2007
7158071Radar rainfall estimation technique when attenuation is negligible
A method of using a bipolar radar to estimate a precipitation rate for rain that generates negligible attenuation. The method includes using the bipolar radar to measure the differential phase ΦDP and the apparent reflectivity Ze on at least o...
01/02/2007
7145503Surface wave radar
A surface wave radar system including a receive antenna array (20, 22) for generating receive signals, and a data processing system (24) for processing received data representing the receive signals to mitigate ionospheric clutter. The received data is...
12/05/2006
7145509Array antenna and radio communication apparatus using the same
A directivity controllable array antenna with a variable phase shifter is provided which is stable and has a small waveform and intermodulation distortion, excellent high power handling capability and low-loss. In an array antenna with a variable phase shifter, the ...
12/05/2006
7139581Method and system for distance measurement in a low or zero intermediate frequency half-duplex communications loop
A method and system for distance measurement in a low or zero intermediate frequency (IF) half-duplex communications loop measures the distance between two transceivers without synchronizing the local oscillators of the two transceivers. Transceiver distance may be ...
11/21/2006
7106443Optical signal-to-noise monitor having increased coherence
Methods and apparatus for rapid, accurate OSNR measurements by directly measuring the spectrally-resolved State of Polarization (SOP) variation across each DWDM channel and using a polarization controller to deterministically extinguish the signal across narrow freq...
09/12/2006
7106247Radar level gauge with antenna arrangement for improved radar level gauging
The present invention relates to a radar level gauge (1) comprising an antenna (2), a tank sealing (3), an electronics unit (4) and a waveguide feed (5) between the electronics unit (4) and the antenna (2). The wavegu...
09/12/2006
7095359Method of observing sea ice
An ice thickness/drifting velocity observation of sea ice by using an ice thickness measurement sonar and a current meter moored into the sea and a sea ice observation by a high-resolution airborne SAR are synchronously performed, a correlation between a draft profi...
08/22/2006
7088287Antenna aligning apparatus for near-field measurement
Provided is an antenna aligning apparatus for near-field measurement, which can perform alignment between a measurement target antenna and a probe antenna precisely by using an antenna pattern and detecting coordinates of the least error. The antenna aligning appara...
08/08/2006
7085499Agile RF-lightwave waveform synthesis and an optical multi-tone amplitude modulator
A waveform synthesizer comprising for synthesizing RF lightwave waveforms in the optical domain. These waveforms are constructed by generating their constituent Fourier frequency components or tones and then adjusting the amplitudes of those frequency components or ...
08/01/2006
7081846ECM techniques to counter pulse compression radar
A system and method for generating a counter-measure signal in response to an incoming radar signal from a remote linear frequency modulated (LFM) pulse compression radar system. One method comprises the steps of receiving an incoming radar signal having a time peri...
07/25/2006
7075479Radar level-measuring device
A method and a device for measuring, by means of radar, in an enclosed space (1) in which a liquid (2) is stored, the level of a liquid surface (6), where the method involves the steps: a radar unit (3) mounted on the roof (4) of t...
07/11/2006
7053838Antenna structure and installation
An antenna system installation comprising a tower/support structure, and an antenna structure mounted at the top of said tower/support structure, said antenna structure comprises a plurality of antenna elements, a plurality of power amplifiers, each power amplifier ...
05/30/2006
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