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8988273 |
System and method for detecting concealed explosives and weapons
A method for detecting hidden explosives or weapons, including transmitting a signal in different polarization channels towards an object, the next stage includes collecting back scattered energy... |
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8989289 |
Communicating distinct data over a single frequency using multiple linear polarized signals
A method and system for transmitting three distinct electromagnetic signals on a same frequency are provided. One or more transmitting devices transmit a first data signal and an inverse of the... |
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8970424 |
Radar level gauge system with reduced antenna reflection
A radar level gauge system for determining a filling level in a tank. The radar level gauge system comprises a transceiver, a horn antenna having a first opening connected to the transceiver and a... |
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8854250 |
Off-diagonal element echo power estimator for polarization weather radar
Embodiments of the invention are directed to improving the sensitivity in polarimetric radar data. In particular, embodiments of the invention improve the sensitivity of such systems with improved... |
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8830114 |
Mobile object detecting apparatus
A mobile object detecting apparatus includes first radiation detecting means; and second radiation detecting means for radiating an electromagnetic wave having the same frequency as the... |
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8823581 |
System and method for detecting dangerous objects and substances
A system and method for detecting dangerous objects and substances are disclosed. According to one embodiment, a method comprises generating a microwave signal that is reflected by a target to... |
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8774303 |
Wireless communication method and apparatus using adaptive transmission polarization control
A wireless communication method and apparatus using adaptive transmission polarization control are provided. The wireless communication apparatus includes an orthogonal polarization antenna, a... |
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8744031 |
Device and method for estimating carrier frequency offset of OFDM signals transmitted and received through plurality of polarized antennas
Provided are a device and method for estimating carrier frequency offset of OFDM signals transmitted and received through a plurality of polarized antennas that may accurately estimate carrier... |
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8730098 |
Method for radar detection of persons wearing wires
Methods are described for radar detection of persons wearing wires using radar spectra data including the vertical polarization (VV) radar cross section and the horizontal polarization (HH) radar... |
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8686891 |
Locating device
The invention relates to a locating device, in particular a hand-guided locating device, with a locating unit (36) for detecting the presence of an object (16, 18) arranged in an examination... |
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8674875 |
Scanners
The invention provides a security scanner that produces a radar profile of a clothed person or another object such as a bag carried by a person at a distance and does not require close proximity... |
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8665144 |
Dual-polarization radar processing system using time domain method
Embodiments of the present invention provide for improved estimation of environmental parameters in a dual-polarization radar system. In some embodiments, environmental parameters can be estimated... |
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8665137 |
Radar system with improved angle formation
A radar system for recording the environment of a motor vehicle includes at least two transmitter antennas for emitting transmission signals, one or more receiver antennas for receiving... |
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8643536 |
Radio frequency positioning system for vehicles
A positioning system for radio frequency devices includes a two-way radio antenna, for vehicles, having a transmitting and a receiving element. Reference antennas have retro-directive arrays which... |
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8598501 |
GPS independent guidance sensor system for gun-launched projectiles
A sensor system uses ground emitters to illuminate a projectile in flight with a polarized RF beam. By monitoring the polarization modulation of RF signals received from antenna elements mounted... |
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8587473 |
System and method for roll angle indication and measurement in flying objects
A method for onboard determination of a roll angle of a projectile. The method including: transmitting a polarized RF signal from a reference source, with a predetermined polarization plane;... |
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8581773 |
Dual frequency transmitter
In embodiments a system to generate a dual frequency, circularly polarized beam of rotating electromagnetic radiation comprises a first radiation source to generate a first radiation beam at a... |
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8558735 |
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... |
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8462879 |
Systems and methods for increasing communications bandwidth using non-orthogonal polarizations
Systems and methods for increasing communications bandwidth using non-orthogonal polarizations are provided herein. Under one aspect, a method of transmitting M independent signals, where M is at... |
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8416127 |
Dynamic calibration radar system
A missile radar system includes a tapered radome covering a front face of a main antenna. A calibration antenna is the combination of a metal tip and an attached one or more radiating or... |
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8384583 |
Synthetic-aperture radar system and operating method for monitoring ground and structure displacements suitable for emergency conditions
A synthetic-aperture radar system, and related operating method, for the monitoring of ground and structure movements, particularly suitable for emergency conditions, characterized by a ground... |
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8368586 |
Person-borne improvised explosive device detection
A system includes a multi-system approach to detecting concealed weapons and person borne improvised explosive devices (PBIED). A first and second radar system operate at different center... |
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8358236 |
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... |
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8358237 |
Wireless sensor apparatus
A wireless sensor apparatus controls, in a case where wireless waves are radiated by feeding pulse signals generated by a signal generation circuit to antennas, an operation timing of the signal... |
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8325084 |
System for calibration of dual polarization radar with built-in test couplers
A calibration system for a dual polarization radar system with built in test couplers has been developed. The system includes a dual polarization radar transmitter antenna that generates a... |
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8305259 |
Dual-band antenna array and RF front-end for mm-wave imager and radar
The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the... |
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8305255 |
Dual-band antenna array and RF front-end for MM-wave imager and radar
The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the... |
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8274428 |
Method for estimating a radar cross-section
A method for estimating a radar cross-section (RES) of a given object by using a diffraction model of this object. With the model, it is possible to determine a basis adapted to said object on... |
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8264398 |
Onboard radar device and program of controlling onboard radar device
An onboard radar apparatus includes a transmission wave generating unit configured to generate a transmission wave, a vertically polarized wave transmitting antenna configured to vertically... |
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8258999 |
System and method for roll angle indication and measurement in flying objects
A method for onboard determination of a roll angle of a projectile. The method including: transmitting a polarized RF signal from a reference source, with a predetermined polarization plane;... |
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8258996 |
Synthetic aperture radar hybrid-quadrature-polarity method and architecture for obtaining the stokes parameters of radar backscatter
A synthetic aperture radar hybrid-quadrature-polarity method and architecture comprising transmitting both left and right circular polarizations (by alternately driving, at the minimum (Nyquist)... |
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8248298 |
Orthogonal linear transmit receive array radar
A radar system having orthogonal antenna apertures is disclosed. The invention further relates to an antenna system wherein the orthogonal apertures comprise at least one transmit aperture and at... |
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8199851 |
Systems and methods for increasing communications bandwidth using non-orthogonal polarizations
Systems and methods for increasing communications bandwidth using non-orthogonal polarizations are provided herein. Under one aspect, a method of transmitting M independent signals, where M is at... |
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8144052 |
Multi-pixel high-resolution three-dimensional imaging radar
A three-dimensional imaging radar operating at high frequency e.g., 670 GHz radar using low phase-noise synthesizers and a fast chirper to generate a frequency-modulated continuous-wave (FMCW)... |
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8115668 |
Object detecting apparatus for vehicle
An object candidate position detecting apparatus which detects a position of an object candidate includes a unifying mechanism which unifies a plurality of object candidates detected within a... |
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8098189 |
Weather radar system and method using dual polarization antenna
An antenna system for a weather radar system includes a first transceiver and a second transceiver. The polarization of the first transceiver is orthogonal to the polarization of the second... |
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8085183 |
Antenna radar system and method for its operation
In an antenna radar system including a short-range function and a long-range function which is situated separately from the short-range function, the short-range function and the long-range... |
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8085181 |
Polarization-modulated transmitter for a weather radar
Polarization modulated transmitter, in particular for a weather radar, with at least two signal paths (3, 4) to which a radio frequency signal can be fed, and which are connected to a coupler (8),... |
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8072369 |
System and method for interrogating a target using polarized waves
A system and method for communication that could be used in an identification friend or foe system. The method comprises generating a first message by a processor and controlling a beam steerer to... |
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8022861 |
Dual-band antenna array and RF front-end for mm-wave imager and radar
The radar includes a PCB having a top surface and a bottom surface, and a processor mounted on the bottom surface of the PCB. The radar includes a second liquid crystal polymer layer formed on the... |
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8004458 |
Means for dual polarization radar with automatic built-in test equipment and calibration
A calibration system for the receiver of a dual polarization radar system has been developed. The system includes a radar transmitter that transmits signals in horizontal and vertical... |
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7999212 |
Precision guided munitions
A guidance system for actively guiding a projectile, such as a bullet after it has been fired from a gun. The guidance system includes a radar unit that includes a plurality of receiver arrays. An... |
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7994965 |
Surveillance apparatus and method
A surveillance apparatus (100) is provided, said apparatus including a linear sub-array (101) of N omnidirectional transmitter elements (103) and a planar sub-array (102) of M receiver elements... |
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7986260 |
Circularly polarized antennas for active holographic imaging through barriers
Circularly-polarized antennas and their methods of use for active holographic imaging through barriers. The antennas are dielectrically loaded to optimally match the dielectric constant of the... |
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7973702 |
Apparatus for position detection using multiple HCF transmissions
An apparatus a transmitter section, a receiver section, and a processing module. The transmitter section transmits a plurality of high carrier frequency beamformed signals in a loop manner until a... |
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7948429 |
Methods and apparatus for detection/classification of radar targets including birds and other hazards
Methods and apparatus for processing data from a low beam channel, a high beam channel and a weather channel to perform an altitude estimation based upon a target amplitude ratio between the low... |
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7928894 |
Phased array radar with mutually orthogonal coding of transmitted and received V and H components
A polarimetric radar with V and H polarized array antenna elements which transmit a V component modulated by a V code and the H component modulated by an H code orthogonal thereto. Unwanted... |
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7920089 |
Variable ratio power divider for a dual polarization radar system with automatic built-in test equipment and calibration
A variable ratio power divider (VRPD) used for adjusting a calibration signal for a dual polarization radar system has been developed. The VRPD includes an input line that receives a calibration... |
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7898459 |
Adaptive specific differential phase in dual-polarization radar
Systems and methods are provided for adaptively estimating the specific differential phase (Kdp) from dual-polarization radar data in the complex domain. Some embodiments adapt for wrapped... |
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7893862 |
Method and apparatus for using collimated and linearly polarized millimeter wave beams at Brewster's angle of incidence in ground penetrating radar to detect objects located in the ground
A detection system comprises a transmitter unit, a receiver, and a processor. The transmitter unit is capable of transmitting a first collimated beam having a first frequency and a second... |