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| Number | Title | Issue Date |
| 8184042 | Self calibrating conformal phased array A system and method for a self calibrating conformal phased array are disclosed involving a plurality of transmit/receive elements; a plurality of embedded, calibration transmit/receive elements scattered across the array; and at least one back-end processor. The ca... | 05/22/2012 |
| 8179305 | Enhanced impulse response measurement of an FM radar transmitter pulse An enhanced impulse response measurement for a pulsed frequency modulation (FM) radar signal provides a more accurate measurement of the amplitude of a secondary response relative to the amplitude of a main response. The pulsed FM radar signal is sampled to produce ... | 05/15/2012 |
| 8089395 | Phase correction in a deployable antenna system A method and corresponding apparatus are provided for phase correction in a deployable antenna system, in particular a redeployable HF surface wave radar phased array antenna system, the antenna system including a master control unit and a plurality of separate ante... | 01/03/2012 |
| 8085189 | Antenna calibration The present invention relates to antenna calibration for active phased array antennas. Specifically, the present invention relates to a built-in apparatus for autonomous antenna calibration. Accordingly, the present invention provides an antenna array comprising: a ... | 12/27/2011 |
| 8077080 | Calibration to improve weather radar positioning determination A method of calibrating antenna-position detection associated with a radar system, the radar system including a first gimbal and a first angle sensor configured to detect an angular position of the first gimbal, includes mounting a second angle sensor to the first g... | 12/13/2011 |
| 8077079 | Radiolocation using path loss data Determining the location of a station or potential rogue access point in a wireless network including accepting an ideal path loss model and calibrating the ideal model using path loss measurements between access points at known locations. The calibrating determines... | 12/13/2011 |
| 8049662 | Systems and methods for antenna calibration A method according to an aspect of the present invention includes determining a phase offset by simultaneously providing a calibration signal to a first element of an antenna and a second element of the antenna opposite the first element. The method further includes... | 11/01/2011 |
| 8031108 | Pulse radar ranging system In a pulse radar ranging system, directional coupling means are configured to convey transmit pulses to be transmitted via an antenna to a target and to convey target echoes received by the antenna to a signal mixer that generates an intermediate frequency signal. T... | 10/04/2011 |
| 8004457 | Antenna calibration The present invention relates to antenna calibration for active phased array antennas. Specifically, the present invention relates to a built in apparatus for autonomous antenna calibration Accordingly, the present invention provides a method of continuous on... | 08/23/2011 |
| 8004456 | Antenna calibration The present invention relates to antenna calibration for active phased array antennas. Specifically, the present invention relates to a built in apparatus for autonomous antenna calibration Accordingly, the present invention provides a method of calibrating a... | 08/23/2011 |
| 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 polarizations and a radar receiver that receives the horizontal and vertical polar... | 08/23/2011 |
| 7982664 | Radar calibration structure and method A radar system with an array antenna includes various signal paths, including beamformers, extending between an exciter, a receiver, and the array antenna. The signal paths are calibrated by a method that includes frequency modulation of the exciter signals that rea... | 07/19/2011 |
| 7936302 | Unwrapping of phase values at array antenna elements A method and apparatus are described for the unwrapping of a set of phase values observed for an incoming signal on a phased array antenna. The difference between values observed on adjacent elements in the array forms a first data set. The differences between adjac... | 05/03/2011 |
| 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 signal and splits the calibration signal into two separate test signals... | 04/05/2011 |
| 7911376 | Systems and methods for antenna array calibration Antenna arrays are calibrated by providing one or more test signals from the antenna array to be calibrated to a receiving sensor while varying ambient operating conditions over some predetermined range of ambient operating conditions. The signal properties of these... | 03/22/2011 |
| 7859452 | Near field electromagnetic calibration system A calibration system for a position determination system, the calibration system includes, in one embodiment, a calibration transmitter producing a calibration signal, a plurality of calibration receivers for receiving the calibration signal, each of the calibration... | 12/28/2010 |
| 7773031 | Signal acquisition and method for ultra-wideband (UWB) radar An acquisition channel (20) includes a UWB sampler block (21) coupled to an analog integration block (22) further coupled to a digital integration block (24) via an analog/digital converter (23). For each range cell the UWB sampler... | 08/10/2010 |
| 7719462 | Time-of-flight radar calibration system A time-of-flight calibration system for a radar-based measurement device is provided. The time-of-flight calibration system includes a target antenna and a waveguide, e.g. a coaxial cable. The waveguide is coupled at one end to the target antenna and terminated at i... | 05/18/2010 |
| 7714775 | Method for accurate auto-calibration of phased array antennas A method and apparatus is disclosed that is capable of verifying on site the health, calibration and integrity of individual phased array modules of a phased array antenna system and, in certain cases, enabling the phased array antenna system to overcome element fai... | 05/11/2010 |
| 7714776 | Antenna array calibration An antenna array comprises a surface comprising a replicated pattern of conductive tracks, the tracks defining a plurality of ports. A plurality of antennae are located at ports distributed about the surface. A plurality of radiative transceivers are electrically co... | 05/11/2010 |
| 7688257 | Marine radar systems and methods Marine radar systems and methods for producing low power, high resolution range profile estimates. Non-linear Frequency Modulation (NLFM) pulse compression pulses are frequency stepped to form a low power, wide-bandwidth waveform. Periodically, calibration filters a... | 03/30/2010 |
| 7667639 | Passive channel calibration method based on non-linear antenna array Taught herein is a passive channel calibration method wherein a non-linear antenna array sets an antenna array to a non-linear formation that contains at least a combination of translation invariant dual array-element couples, detects single-azimuth ocean echoes via... | 02/23/2010 |
| 7649492 | Systems and methods for providing delayed signals A variable delay apparatus comprises a calibrating unit receiving a signal from a variable delay unit and from a plurality of fixed delay sources, the calibrating unit comparing the signal from the variable delay unit with a plurality of signals from the fixed delay... | 01/19/2010 |
| 7598905 | Systems and methods for monitoring transponder performance There are presented various approaches to monitor performance of RF systems and circuitry such as those used in aircraft transponders. Such monitoring may be designed to verify operational performance of transponders as set forth by FAA regulations, or may be used t... | 10/06/2009 |
| 7592949 | Near field electromagnetic positioning calibration system and method A system and method for electromagnetic position determination utilizing a calibration process. For calibration, a transmitter is positioned at multiple locations in an area of interest and multiple receivers receive and record signal characteristics from the transm... | 09/22/2009 |
| 7592948 | System and method for dual polarization radar with automatic built-in test equipment and calibration A method of calibrating a dual polarization weather radar system has been developed. The method first generates a transmission pulse from the radar system. The transmission pulse is then modified to generate a test signal that simulates a desired atmospheric conditi... | 09/22/2009 |
| 7576686 | Method and system for calibrating an antenna array for an aircraft surveillance system In accordance with one aspect of the present invention, a method is provided for calibrating an aircraft surveillance system for a protected aircraft. The system has a phased antenna array comprising antenna elements. The method comprises transmitting a first signal... | 08/18/2009 |
| 7570201 | Radar exciter including phase compensation of the waveform generator Phase compensation for the phase non-linearities introduced by the filters, amplifiers, and other microwave devices included in waveform generators in a radar system is achieved by first measuring the phase errors over a predetermined frequency range which are then ... | 08/04/2009 |
| 7554486 | System and method 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 polarizations and a radar receiver that receives the horizontal and vertical polar... | 06/30/2009 |
| 7548189 | Using radar targets of opportunity to build a monopulse calibration table In a radar system, a monopulse calibration table is constructed from live targets of opportunity. A center of gravity or weighted average of normalized signals ΔV received at SUM and DIFF channels from a live target are used to determine the target's actual azimuth... | 06/16/2009 |
| 7535411 | System and method for detecting drifts in calibrated tracking systems A method and system for detecting drift in calibrated tracking systems used to locate features with respect to one or more coordinate systems allows medical devices to be accurately tracked within a reference coordinate system, and facilitates detection and compensa... | 05/19/2009 |
| 7528767 | 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 signal and splits the calibration signal into two separate test signals... | 05/05/2009 |
| 7522097 | Radar platform angular motion compensation A method to compensate for radar platform angular motion may include measuring or estimating any radar platform angular motion. The method may also include substantially decoupling each array subsection response of a plurality of array subsection responses from any ... | 04/21/2009 |
| 7501980 | Method and device for calibrating sensors in a motor vehicle A method and a device are described for calibrating at least two sensors, the sensors being of a different sensor type. The sensors may be located in or on a motor vehicle. It is possible to calibrate the at least two sensors in one operation by using a calibration ... | 03/10/2009 |
| 7482971 | Time-of-flight-ranging system and method for calibrating such a system An embedded calibration mechanism and method for a time-of-flight ranging system. The calibration mechanism (200) comprises a channel (202) having known characteristics. Periodically or as part of a calibration function, a pulse is transmitted through ... | 01/27/2009 |
| 7474259 | Traffic sensor and method for providing a stabilized signal A traffic sensor is mounted at a fixed location to monitor multiple lanes of traffic. The traffic sensor (a) generates a programmable time-varying modulating signal; (b) generates a modulated microwave signal based on the programmable time-varying modulating signal;... | 01/06/2009 |
| 7471237 | Built-in missile RADAR calibration verification Array antenna calibration verification coupling interrogator and responder with mode-related interrogation signal having a previous calibration phase angle, producing in responder a characteristic interrogation response. Conjugate signal is generated by reversing ph... | 12/30/2008 |
| 7468690 | Method and system for calibrating ESA, distributed waveform generator and receivers in sub-arrays A system for calibrating waveform generators and receivers of non-overlapping electronic scanning antennas includes a first sub-array, a second sub-array and a calibration cable. The first sub-array includes a first waveform generator, a first receiver, and a first ... | 12/23/2008 |
| 7446698 | Pulse-coded remote calibration of an active phased array system A method for remotely calibrating an active phased array system, and more particularly an antenna, (APA), used in transmission and/or in reception, comprising transmitting and/or receiving a set of calibration pulses (RCP, TCP). Contrarily to methods known from the ... | 11/04/2008 |
| 7439901 | Active phased array antenna for aircraft surveillance systems An active antenna is provided that includes an antenna element for transmitting RF transmit signals at a predetermined effective radiated power (ERP). An antenna module is configured to be mounted to an aircraft, with the antenna element being mounted to the antenna... | 10/21/2008 |
