Did You Know...
...that in the early 1940s GE engineer James Wright was charged with a task of utmost importance to the war effort: develop a cheap substitute for rubber that could be used to produce tires, gas masks and a whole host of military gear. Wright tackled the task diligently -- and wound up inventing Silly Putty.
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| Number | Title | Issue Date |
| 7612706 | Monopulse radar apparatus and antenna switch An antenna unit includes at least one transmission antenna and plural reception antennas. A receiver detects information including azimuth information for a target, based on an output from the antenna unit. An antenna switching unit switches connections between a tr... | 11/03/2009 |
| 7358891 | Multipath 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 |
| 7330149 | Method for locating multiple angle sources using a monopulse radar A monopulse radar tracking method which analyzes boresight error information provided a monopulse radar to determine a location for two targets. The monopulse radar tracking method analyzes the boresight error information to determine an angle of arrival for a domin... | 02/12/2008 |
| 7268724 | Reduced-error monopulse processor This monopulse processor provides target position information having an RMS error which is less than that of a conventional monopulse processor. A Σ±jΔ vs. Σ processor is modified to provide a position output signal equal to the smaller in absolute magnitude of ... | 09/11/2007 |
| 7250902 | Method of generating accurate estimates of azimuth and elevation angles of a target for a phased—phased array rotating radar A method and apparatus for generating accurate estimates of a radar target's azimuth and elevation angles for a phased-phased array rotating radar. Scan modulated coherently integrated (SMCI) monopulse curves are generated from a measured one-way transmit antenna pa... | 07/31/2007 |
| 7248205 | Radar apparatus A transmitter emits into an intended search space a radar wave having a predetermined frequency pulse-modulated by a trigger pulse of a predetermined width. A receiver receives a reflected wave of the radar wave and outputs a receive signal. A local pulse generator ... | 07/24/2007 |
| 7239265 | Method for evaluating and controlling a radar installation A method is disclosed for evaluating the terrain surrounding a radar site. The method comprises to calculate the radar horizon around a radar site from stored terrain elevation information. The information obtained can be used for controlling the scanning profile of... | 07/03/2007 |
| 7218272 | Reducing antenna boresight error Reducing antenna boresight error includes receiving radar pulses reflected from the ground, where pulses are emitted from the antenna of a radar system, reflected by the ground, and received by the antenna. The return pulses carry information about the ground. Measu... | 05/15/2007 |
| 7212120 | Work site tracking system and method A system for tracking entities at a work site includes an antenna having a scanned boresight. A controller may be configured to determine a relative angle between a reference associated with the antenna and a source of radiation based on a relationship between bores... | 05/01/2007 |
| 7164381 | Target identifying apparatus, target identifying method, and target identifying program A target identifying apparatus identifies a target from a first signal distribution and includes a calculation section, a target signal identifying section, a subtraction section, and a correction section. The calculation section calculates a quadratic approximate e... | 01/16/2007 |
| 7165009 | Apparatus, method and articles of manufacture for velocity and bearing determination of an object A sensor front end is disclosed that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system includes a signal source for transmitting at least a first and a second sensor signal toward the ... | 01/16/2007 |
| 7161530 | System and method for radar calibration using antenna leakage The system and method for radar calibration using antenna leakage is a simplified means of calibrating the channels in amplitude and phase using natural signal leakage between antennas. It utilizes as calibration signal a wideband sinusoidal Frequency Modulated Cont... | 01/09/2007 |
| 7136012 | Approach radar with array antenna having rows and columns skewed relative to the horizontal A monopulse precision landing or other land-based radar system uses an array antenna and a beamformer to produce sum, azimuth difference and elevation difference beams relative to the array. The rows and columns of the array are skewed relative to the horizontal for... | 11/14/2006 |
| 7091900 | Radar A radar of the present invention has: (1) an antenna unit for transmitting a radio wave and receiving a reflected wave of the radio wave; (2) rotating means for rotating the antenna unit about an axis along a direction of transmitt... | 08/15/2006 |
| 7082172 | Digital signal gating apparatus and method in a pulse receiver system A digital signal gating method and apparatus of a preprocessor in a detection system wherein the detection system includes a central processing unit, a main memory and a receiver, whereby the apparatus and method bifurcate received digital signals, delays them along... | 07/25/2006 |
| 7068215 | Reducing antenna boresight error Reducing antenna boresight error includes receiving radar pulses reflected from the ground, where pulses are emitted from the antenna of a radar system, reflected by the ground, and received by the antenna. The return pulses carry information about the ground. Measu... | 06/27/2006 |
| 7053815 | Radar tracking system A radar tracking system for an anti-aircraft, missile, including angle tracking, doppler tracking and range tracking feedback loops operating on sum and difference channels. Fast fourier transform digital filters are used to provide a frequency spectrum of the sum a... | 05/30/2006 |
| 7046188 | System and method for tracking beam-aspect targets with combined Kalman and particle filters Systems and methods of tracking a beam-aspect target are provided. In embodiments, a target is tracked with a Kalman filter while detections are received. After a detection is missed, the Kalman filter may be concurrently propagated with a blind-zone particle filter... | 05/16/2006 |
| 7038615 | Efficient technique for estimating elevation angle when using a broad beam for search in a radar A method and apparatus for estimating elevation angle when using a broad search beam such as a cosecant-squared beam is provided. The range of a target detected during a search with a broad beam covering a broad angular search area is determined. Based on the determ... | 05/02/2006 |
| 7019692 | System and method for narrowband pre-detection signal processing for passive coherent location applications A system and method for narrowband pre-detection signal processing in passive coherent location applications is disclosed. A receiving subsystem receives a reference signal and a target signal from an uncontrolled transmitter. The target signal is reflected from a t... | 03/28/2006 |
| 7012552 | Civil aviation passive coherent location system and method A civil aviation passive coherent location system and method is disclosed. A receiver subsystem receives reference transmissions from an uncontrolled transmitter. The receiver subsystem also receives scattered transmissions originating from the uncontrolled transmit... | 03/14/2006 |
| 6995705 | System and method for doppler track correlation for debris tracking The present invention is directed to a system and method for Doppler track correlation for debris tracking in PCL radar applications. The disclosed embodiments describe the systems and methods used in the detection of debris pieces and the association of the Doppler... | 02/07/2006 |
| 6980151 | System and method for onboard detection of ballistic threats to aircraft A bi-static continuous wave radar system and related methods for detecting incoming threats from ballistic projectiles includes a remote source of RF illumination, and a local receiver installed in one or more target aircraft. A first receiving channel acquires dire... | 12/27/2005 |
| 6975263 | Device for position determination by means of radio waves A device for determining the position of a vehicle on a roadway by using radio waves which are emitted from the device and reflected by the vehicle and received by at least two array antennas (1, 2) arranged across the roadway, wherein the array antennas (... | 12/13/2005 |
| 6937186 | Main beam alignment verification for tracking antennas A method for main beam alignment verification includes providing data pertaining to one or more patterns associated with an antenna, measuring power levels of a signal acquired by the antenna, and comparing the measured power levels with the data to determine whethe... | 08/30/2005 |
| 6937746 | System and method for automatic recognition of formations in moving target indication data A system and method for determining a threat level associated with a collection of detected objects within a geographical area of interest are disclosed. A set of formation templates representative of organizational patterns are defined. Configurations for the templ... | 08/30/2005 |
| 6911934 | Apparatus, method and articles of manufacture for sequential lobing high resolution radar A sensor front end that is able to discriminate objects based on their range from the sensor and to derive bearing information therefrom. The sensor system may include a signal source for generating source signal; an antenna system for transmitting the source signal... | 06/28/2005 |
| 6900764 | Steerable-beam multiple-feed dielectric resonator antenna A radiating antenna capable of generating or receiving radiation using a plurality of feeds and a dielectric resonator is disclosed. The purpose of using multiple feeds with a single dielectric resonator antenna is to produce several beams each having a ‘boresight... | 05/31/2005 |
| 6853330 | Inverse precision velocity update for monopulse calibration A radar system derives a correction for an actual boresight (311) of a radar monopulse antenna mounted on a moving platform from Σ data and Δ data generated with respect to an a priori known, calibrated boresight (309). The monopulse antenna (602 | 02/08/2005 |
| 6853329 | Monopulse radar system A monopulse radar system for detecting an azimuth depending upon amplitude difference or phase difference between signals respectively received by plural receiving antennas, includes: a transmitting array antenna and a receiving array antenna each including antenna ... | 02/08/2005 |
| 6771205 | Shipboard point defense system and elements therefor A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational information or tracking information on selected targets. Additionally, the disc... | 08/03/2004 |
| 6750810 | Monopulse radar system To realize a monopulse radar system wherein the velocity of a mobile body, distance between an obstacle and the mobile body and relative velocity can be detected and simultaneously, the direction of the obstacle can be detected, in a monopulse radar system wherein a... | 06/15/2004 |
| 6697009 | Adaptive digital beamforming architecture for target detection and angle estimation in multiple mainlobe and sidelobe jamming A system and method for detecting a radar target of interest in the presence of radar jamming interference include a sub-array beamformer, a sum and difference beamformer, a weight calculator, a composite beamformer, and a monopulse ratio calculator. A pl... | 02/24/2004 |
| 6661366 | Adaptive digital sub-array beamforming and deterministic sum and difference beamforming, with jamming cancellation and monopulse ratio preservation A radar system and technique provide the capability to detect a target of interest and maintain the detection in the presence of multiple mainlobe and sidelobe jamming interference. The system and technique utilize digital beamforming to form sub-arrays f... | 12/09/2003 |
| 6630902 | Shipboard point defense system and elements therefor A radar receiver is shown wherein the frequency of a first local oscillator is changed to bring an intermediate frequency signal representative of a moving target into frequency coincidence with a signal from a reference oscillator of fixed frequency.... | 10/07/2003 |
| 6618008 | Monopulse phased array system A monopulse phased array system comprises antenna elements with T/R modules controlled a beam steering computer. The space in which the antenna elements are arranged is divided into quadrants which are defined relative to the main axis of the radar beam. ... | 09/09/2003 |
| 6603421 | Shipboard point defense system and elements therefor A combined defense and navigational system on a naval vessel is disclosed. The disclosed system includes a track-while-scan pulse radar which is controlled to provide either navigational information or tracking information on selected targets. Additionall... | 08/05/2003 |
| 6567034 | Digital beamforming radar system and method with super-resolution multiple jammer location In a radar system, sampled aperture data are received from an antenna array. The sampled aperture data include data that do not correspond to echo returns from a beam transmitted by the antenna. A covariance matrix is generating using the sampled aperture... | 05/20/2003 |
| 6498581 | Radar system and method including superresolution raid counting A system identifies a number of targets within a main beam of an antenna array that transmits the main beam and receives echo returns from the main beam. A covariance matrix is generated using the echo returns. The presence of at least one target within a... | 12/24/2002 |
| 6476760 | Device for detecting angle of elevation error in a multiple beam radar sensor A method and a radar sensor for determining an elevation angle error of a multibeam radar sensor are described. In order to detect an elevation angle of the multibeam radar system with respect to a predefined target, a plurality of laterally arranged cutt... | 11/05/2002 |
