Class / Patent application number | Description | Number of patent applications / Date published |
342188000 | With polarization | 16 |
20090262011 | Instantaneous 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. Illustratively, the transmitted signals from Golay pairs, and the processing method employs a complex-conjugate time reversal operand. The received reflected signals are processed for a particular distance in mind to develop a scattering matrix of the medium at that distance. By comparing the scattering matrix to known scattering matrices an identification of the target from where the transmitted signals were reflected is obtained. | 10-22-2009 |
20110095942 | WIRELESS SENSOR APPARATUS - A wireless sensor apparatus includes first and second polarization antennas whose polarization surfaces of radiation waves are mutually orthogonal, a first mixer circuit connected to the first polarization antenna and configured to input a first reception signal received by the first polarization antenna, a second mixer circuit connected to the second polarization antenna and configured to input a second reception signal received by the second polarization antenna, a signal generation circuit configured to generate pulse signals fed to the first and second polarization antennas and also supplied to the first and second mixer circuits, and a differential amplification circuit configured to perform a differential amplification on a mixed output obtained by mixing the first reception signal and the pulse signal by the first mixer circuit and a mixed output obtained by mixing the second reception signal and the pulse signal by the second mixer circuit. | 04-28-2011 |
20120044105 | HIGH-RESOLUTION RADAR MAP FOR MULTI-FUNCTION PHASED ARRAY RADAR - A method of operating a multi-function phased array radar system having an antenna array populated with dual-pol antenna elements is described. The method includes selectively controlling individual dipoles of each dual-pol antenna element in order to operate the array in either a polarimetric mode with improved cross-pol isolation, or in a multi-mission mode, wherein a plurality of singularly-polarized signals are produced. | 02-23-2012 |
20120146843 | SYSTEM AND METHOD FOR PROVIDING SCANNING POLARIZED REFERENCE SOURCES - A method of providing a polarized radio frequency scanning source is provided. The method including amplitude modulating at least two synchronized polarized radio frequency (RF) carrier signals with a predetermined relationship between their amplitude modulation of their electric field components and their polarization states to provide a scanning polarized RF reference source with a desired scanning range, pattern and frequency. The two or more synchronized polarized RF carrier signals with the predetermined relationship between their amplitude modulation can obtain a periodic or non-periodic scanning range, rate and frequency. | 06-14-2012 |
20120256786 | Detection of Objects - A detection method comprising directing radiation such that it is incident upon a target, the radiation containing a component having a first polarisation and a component having a second orthogonal polarisation, detecting radiation which is scattered from the target, and analysing the polarisation state of the detected scattered radiation to determine whether the target includes an object. | 10-11-2012 |
20130063299 | Systems, Methods and Apparatuses for Remote Device Detection - A radar device has a transmitter having a field of view for transmitting a transmit signal and a receiver for receiving a received signal from the field of view of the transmitter. The transmit signal comprising first and second polarization components and multiple frequencies. There is a signal processor programmed to: detect received signal components comprising first and second polarization components and fundamental and harmonic frequencies corresponding to the first and second polarization components and multiple frequencies in the received signal; compare the received signal components to characterize the received signal and identify a remote device as a linear conductor or a non-linear conductor based on predetermined criteria; and generate a notification signal corresponding to the remote device when the remote device is identified. | 03-14-2013 |
20130154874 | HIGH EFFICIENCY MULTI-BEAM ANTENNA - A spacecraft has a high efficiency multi-beam antenna (MBA) system that serves a coverage region on the Earth. The coverage region subtends an angle, when viewed from the spacecraft, of at least ten degrees. The antenna system provides, within the coverage region, at least sixteen spot beams. A signal provided by the MBA system to each spot beam has a carrier to interference ratio (C/I) of no less than 20 dB. The system enables use of a three color frequency reuse scheme without recourse to signal encoding. | 06-20-2013 |
20130176164 | PHASED ANTENNA ARRAY WITH ELECTRO-OPTIC READOUT CIRCUIT AND RELATED METHODS - A phased antenna array includes an array of antenna elements, and an electro-optic (EO) readout circuit coupled to the array of antenna elements. The EO readout circuit includes an optical source configured to generate an optical carrier signal, a first EO modulator configured to modulate a signal from an antenna element based upon the optical carrier signal, and an optical-to-electrical converter coupled downstream from the first EO modulator. | 07-11-2013 |
20130176165 | PHASED ANTENNA ARRAY WITH ELECTRO-OPTIC READOUT CIRCUIT WITH MULTIPLEXING AND RELATED METHODS - A phased antenna array includes an array of antenna elements, and an electro-optic (EO) readout circuit coupled to the array of antenna elements. The EO readout circuit includes an optical source having a first wavelength division multiplexer (WDM) configured to generate an optical carrier signal including beam carrier wavelengths, a first EO modulator configured to modulate a signal from an antenna element based upon the optical carrier signal, a second WDM coupled downstream from the first EO modulator, and optical-to-electrical converters coupled downstream from the second WDM. The second WDM is configured to multiplex each modulated beam carrier wavelength to a respective optical-to-electrical converter. | 07-11-2013 |
20130229302 | PASSIVE MILLIMETER WAVE DIFFERENTIAL INTERFERENCE CONTRAST POLARIMETRY - Differential polarization imaging systems include an axicon configured to provide a displacement of ray bundles associated with different image patches. The displaced ray bundles are directed to antenna horns and orthomode transducers so as to provide outputs correspond to orthogonal linear states of polarization (SOPs). The outputs are directed to a differential radiometer so that Stokes parameter differences between image patches can be obtained. The ray bundle displacements can be selected to correspond to a mechanical spacing of antenna horns. In some examples, ray bundle displacement corresponds to a displacement less than the diffraction limit. | 09-05-2013 |
20140035781 | Multi-Polarization Antenna Array For Signal Detection and AOA - A multi-polarization radio frequency (RF) antenna includes an array of impulse sensors that are capable of detecting RF signals within a surrounding environment. In some embodiments, antennas are provided for use within the high frequency (HF) band. The array of impulse sensors may include, for example, one or more B-dot sensors and/or one or more D-dot sensors. Various different antenna configurations are provided that are capable of operation with multiple different polarizations. | 02-06-2014 |
20140070982 | OBSTACLE DETECTION DEVICE FOR VEHICLE - A vehicle obstacle detection device comprises: a radar unit provided between a back surface of a bumper and a wheel and configured to detect an obstacle by transmitting a radio wave through the bumper; and a misdetection prevention member for preventing misdetection in the radar unit by suppressing the occurrence of an own-vehicle's wheel reaching wave which is a part of a transmission wave and which passes between a transmitter section of the radar unit and the back surface of the bumper and reaches the wheel of the own vehicle. | 03-13-2014 |
20140184439 | SCALABLE POLARIMETRIC PHASED ARRAY TRANSCEIVER - A polarimetric transceiver front-end includes two receive paths configured to receive signals from an antenna, each receive path corresponding to a respective polarization. Each front-end includes a variable amplifier and a variable phase shifter; a first transmit path configured to send signals to the antenna, where the transmit path is connected to the variable phase shifter of one of the two receive paths and includes a variable amplifier; and a transmit/receive switch configured to select between the first transmit path and the two receive paths for signals, where the transmit/receive switch includes a quarter-wavelength transmission line that adds a high impedance to the transmit path when the transmit/receive switch is in a receiving state. | 07-03-2014 |
20140266866 | STEERABLE TRANSMIT, STEERABLE RECEIVE FREQUENCY MODULATED CONTINUOUS WAVE RADAR TRANSCEIVER - Apparatus, method, and system example embodiments provide an improved integrated circuit RF front end to simultaneously transmit and receive signals for radar imaging. In an example embodiment, an apparatus comprises a transceiver coupled to a circularly polarized antenna assembly, capable of transmitting circularly polarized signals that are a component of a multi-signal radar beam; a power amplifier configured to amplify a transmit signal, coupled through isolation couplers to the circularly polarized antenna assembly; a phase shifting block circuit configured to perform phase shifting of a local oscillator signal, in response to the receipt of phase control signals, to perform phased-array beam steering of the multi-signal radar beam when the component circular signals are associated with signals transmitted from other transceivers receiving the phase control signals. The apparatus further includes a receiver circuit utilizing a receive phase-shifting circuit coupled to a quadrature down-conversion mixer, for receive beam steering. | 09-18-2014 |
20160195607 | SHORT-RAGNE OBSTACLE DETECTION RADAR USING STEPPED FREQUENCY PULSE TRAIN | 07-07-2016 |
20180024226 | Antenna and Radar System That Include a Polarization-Rotating Layer | 01-25-2018 |