Monopulse Patents (Class 342/149)
  • Patent number: 11150326
    Abstract: A radar system with angle error determination function and method thereof are provided. The system includes a camera device, a radar device, a calculation module, and an angle calibration module. The camera device captures a surveillance image of a surveillance area. The radar device sends a radar signal toward the surveillance area. The calculation module, according to the surveillance image, acquires an image angle of an object with respect to the vehicle in the surveillance area. Also, the calculation module acquires a radar angle of the object with respect to the vehicle which is produced according to a reflection signal generated when the radar signal meets the object. The angle calibration module, by referring to the image angle, correspondingly calibrates the radar angle. Therefore, the radar angle is immediately calibrated.
    Type: Grant
    Filed: January 9, 2019
    Date of Patent: October 19, 2021
    Assignee: CUBTEK INC.
    Inventors: San-Chuan Yu, Shyh-Jong Chung, Jyong Lin
  • Patent number: 11105914
    Abstract: Monopulse radar apparatus is disclosed. The apparatus comprises a digital processor and an antenna having a plurality of receive channels through which signals received by the antenna are passed to the processor. Each receive channel includes an analogue to digital converter, and the processor is arranged to calculate sum and difference signals from the signals received through each receive channel. The processor is also arranged such that, in the event that a malfunction is detected in one of the plurality of receive channels, compensated sum and difference signals are calculated by the processor using the signals from the remaining, functioning receive channels.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: August 31, 2021
    Assignee: MBDA UK LIMITED
    Inventor: Tamara Louise Sheret
  • Patent number: 10996328
    Abstract: A mainlobe detection process can include a number of tests that are performed to define when the monopulse antenna system will transition from open loop scanning to closed loop scanning and then to tracking. A hybrid tracking technique is also provided which adaptively discovers and corrects for phase alignment error. Magnitude-only tracking can be performed initially to locate the nulls in the azimuth and elevation ratios and to identify the magnitudes of these ratios at these nulls. Phase tracking can be then performed. During phase tracking, phase corrections can be repeatedly applied to the azimuth and elevation difference channels to correct any phase error that may exist. During this process, the magnitudes of the ratios can be used to determine how the phase corrections should be adjusted. Once the hybrid tracking process is complete, the monopulse antenna system is properly phase-aligned and phase tracking will be correctly employed.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: May 4, 2021
    Assignee: L-3 Communications Corp.
    Inventors: Sy Prestwich, Jeffrey B. Bench, Richard A. McNamee
  • Patent number: 10830882
    Abstract: Methods, apparatus, systems and articles of manufacture are disclosed for distributed, multi-node, low frequency radar systems for degraded visual environments. An example system includes a transmitter to transmit a radar signal. The example system includes a distributed network of radar receivers to receive the radar signal at each receiver. The example system includes a processor to determine a first range and a first angular position of a background point based on return time, wherein the first range and the first angular position are included in first data; determine a second range and a second angular position of the background point based on doppler shift, wherein the second range and the second angular position are included in second data; determine a refined range and a refined angular position, wherein the refined range and refined angular position are included in third data, and generate a radar map based on third data.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: November 10, 2020
    Assignee: GE Aviation Systems, LLC
    Inventor: Dean Shollenberger
  • Patent number: 10705198
    Abstract: In accordance with an embodiment, a method of monitoring an air flow includes performing a plurality of radar measurements using a millimeter-wave radar sensor with a line of sight having a component perpendicular to a direction of an air flow, detecting an object in the air flow based on the plurality of radar measurements, calculating a displacement of the object and a size of the object based on the plurality of radar measurements, estimating a velocity of the object based on the calculated displacement, and calculating a risk metric based on the calculated size of the object and estimated velocity of the object.
    Type: Grant
    Filed: March 27, 2018
    Date of Patent: July 7, 2020
    Assignee: INFINEON TECHNOLOGIES AG
    Inventors: Avik Santra, Jagjit Singh Bal
  • Patent number: 10705201
    Abstract: An enhanced vision method or a weather radar system can be used with an aircraft and includes an antenna and a control circuit. The control circuit is configured to provide radar beams via the antenna toward external surroundings and is configured to receive radar returns. The control circuit is configured to process a collection of radar measurements from the radar returns, wherein each of the radar measurements is associated with a location determined using an antenna position, an antenna attitude, a beam sharpening angle, and a range. The radar measurements are processed to determine power density per grid cell associated with the power and location of the radar measurements, and the power density per grid cell is used to provide an image associated with the power and location of the radar measurements.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: July 7, 2020
    Assignee: Rockwell Collins, Inc.
    Inventors: Richard D. Jinkins, Richard M. Rademaker, Daniel L. Woodell
  • Patent number: 10615890
    Abstract: Phase correction systems and methods capable of operating in a deployed antenna system are provided. The phase correction system includes a signal generator and a signal coupler. The signal coupler injects a signal at an end of a signal line adjacent an antenna element. Changes in an effective length of the signal line can be detected at a controller that monitors characteristics of the injected signal after it has passed through the signal line. The system can adapt to detected changes in the electrical length by controlling an adjustable phase shifter provided in line with the signal line or by applying suitable post-processing.
    Type: Grant
    Filed: December 4, 2018
    Date of Patent: April 7, 2020
    Assignee: Ball Aerospace & Technologies Corp.
    Inventors: Gordon C. Wu, Cynthia Wallace, David W. Draper
  • Patent number: 10598779
    Abstract: A radar is equipped with a main antenna having three radiation patterns, sum, difference and control, corresponding to the antenna, the radar comprises an auxiliary antennal device, composed of an antenna and of a rear radiating element which is situated at the rear of the antenna, fixed above the antenna and coupling means, the auxiliary antennal device: having three radiation patterns, sum, difference and control, the control pattern ensured for the direction opposite to the antenna by the rear radiating element; the antenna inclined to guarantee a maximum gain of its sum pattern in the elevational domain (60°-90°).
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: March 24, 2020
    Assignee: THALES
    Inventor: Philippe Billaud
  • Patent number: 10591584
    Abstract: A system and method perform calibration of a radar system on a mobile platform. A position of the platform is obtained along with a relative position of one or more stationary objects from the platform using the position of the platform and a mapping algorithm as ground truth and one or more radar parameters regarding the one or more stationary objects using the radar system, the one or more radar parameters including an angle estimate. The method includes determining a correction matrix based on the one or more parameters and the ground truth, and obtaining corrected received signals from subsequent received signals of the radar system based on the correction matrix.
    Type: Grant
    Filed: October 25, 2016
    Date of Patent: March 17, 2020
    Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
    Inventors: Oded Bialer, Igal Bilik
  • Patent number: 10585186
    Abstract: A radar attached laterally to airplane fuselage to detect obstacles on a collision course with a portion of the airplane facing the radar. The radar includes an emission antennal channel and reception antennal channels in the same plane. The radar Establishing in a radar coordinate system a first distance/Doppler map allowing echoes to be separated into distance and Doppler resolution cells in reception antennal channels; Establishing a second distance/Doppler map of smaller size by selecting a subset of distance/Doppler resolution cells corresponding to possible positions of targets liable to collide with the airplane; Establishing new distance/Doppler maps by forming beams computationally from the subsets of distance resolution cells; and Temporal integration, in each beam, of successive distance/Doppler maps.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: March 10, 2020
    Assignee: THALES
    Inventors: Pascal Cornic, Patrick Le Bihan, Yves Audic
  • Patent number: 10585172
    Abstract: The distinguishing of rain echoes from ground echoes is performed by an analysis of the attenuation of the radar echoes, a radar echo being classed as a rain echo if its attenuation on a logarithm scale as a function of distance fluctuates around an affine straight line according to a given statistical law.
    Type: Grant
    Filed: September 4, 2015
    Date of Patent: March 10, 2020
    Assignee: THALES
    Inventors: Cyrille Enderli, Mathias Lombard, Marie-Françoise Schaub
  • Patent number: 10473780
    Abstract: In an example method, a vehicle configured to operate in an autonomous mode could have a radar system used to aid in vehicle guidance. The method could include a plurality of antennas configured to transmit and receive electromagnetic signals. The method may also include a one or more sensors configured to measure a movement of the vehicle. A portion of the method may be performed by a processor configured to: i) determine adjustments based on the movement of the vehicle; ii) calculate distance and direction information for received electromagnetic signals; and iii) recover distance and direction information for received electromagnetic signals with the adjustments applied. The processor may be further configured to adjust the movement of the autonomous vehicle based on the distance and direction information with adjustments applied.
    Type: Grant
    Filed: August 15, 2017
    Date of Patent: November 12, 2019
    Assignee: Waymo LLC
    Inventor: Adam Brown
  • Patent number: 10459071
    Abstract: An orthogonal separation device of the invention includes a demodulator that performs a demodulation process corresponding to each of a plural number N of antennas for each of a plural number P (=M×N) of pulse waves (R11 to R1M), . . . , (RN1 to RNM) which arrives at the plural number N of antennas by transmitting, at the same time, a plural number M of pulse waves having phases ?1 to ?M set as different arrays of known discrete values and that generates a plural number P of demodulated signals (R?11 to (R?1M), . . . (R?N1 to R?NM), and includes a phase adjuster that adjusts difference among the phases of a plural number P of demodulated signals (R?11 to R?1M), . . . , (R?11 to R?NM) according to the arrays of known discrete values and generates a plural number P of in-phase signals (r11 to r1M), . . . , (rN1 to rNM).
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: October 29, 2019
    Assignee: JAPAN RADIO CO., LTD.
    Inventors: Yukinobu Tokieda, Keiko Matsumoto
  • Patent number: 10324177
    Abstract: An interrogator and system employing the same. In one embodiment, the interrogator includes a receiver configured to receive a return signal from a tag and a sensing module configured to provide a time associated with the return signal. The interrogator also includes a processor configured to employ synthetic aperture radar processing on the return signal in accordance with the time to locate a position of the tag.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: June 18, 2019
    Assignee: LONE STAR IP HOLDINGS, LP
    Inventors: Hugh Logan Scott, Steven D. Roemerman, John P. Volpi
  • Patent number: 10261176
    Abstract: Techniques are disclosed for systems and methods to provide orientation and/or position data from an orientation and/or position sensor (OPS) while it is rotating. A system includes a logic device configured to communicate with an OPS that is rotationally coupled to a mobile structure. The logic device is configured to receive orientation and/or position data from the OPS while the OPS is rotating relative to the mobile structure and determine rotationally corrected orientation and/or position data referenced to the mobile structure, a rotationally actuated sensor assembly mounted to the mobile structure, and/or an absolute coordinate frame.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: April 16, 2019
    Assignee: FLIR SYSTEMS, INC.
    Inventors: Mark Johnson, Paul Stokes, Richard Jales
  • Patent number: 10209344
    Abstract: A system and method for mitigating multipath propagation are disclosed herein. The method may include collecting a plurality of detections of a target, forming a plurality of models each assuming at least one parameter causing multipath propagation, determining which model best fits the detections of the target, using the best fit model to approximate the ground conditions, and using the approximated ground conditions to remove the multipath error from the observed signals.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: February 19, 2019
    Assignee: SRC, Inc.
    Inventors: John C. Dougherty, Gregory A. Mesagna
  • Patent number: 10044100
    Abstract: In an on-vehicle radar device, a receiving antenna part includes a first antenna array with a plurality of receiving antennas arranged in a first direction perpendicular to a predetermined reference direction, and a second antenna array with three or more receiving antennas arranged in a second direction perpendicular to the reference direction and different from the first direction. A computing part computes the elevation angle of an object, using a first detection angle formed by the reference direction and a direction of the object acquired using the first antenna array in a plane parallel to the reference direction and the first direction, a second detection angle formed by the reference direction and a direction of the object acquired using the second antenna array in a plane parallel to the reference direction and the second direction, and a relative inclination angle formed by the first and second directions.
    Type: Grant
    Filed: December 12, 2016
    Date of Patent: August 7, 2018
    Assignee: NIDEC ELESYS CORPORATION
    Inventor: Akira Abe
  • Patent number: 9952083
    Abstract: A method and a system for evaluating a content of a bin, the method may include (a) transmit multiple acoustic pulses by multiple acoustic transceiver arrays towards different areas of an upper surface of the content when the acoustic transceivers are positioned at different locations; wherein the multiple acoustic transceiver arrays are connected to a device that is moved according to a movement pattern between the different locations; receive by the multiple acoustic transceiver arrays multiple echoes of the multiple acoustic pulses; process by the multiple acoustic transceiver arrays the multiple echoes to provide multiple estimates of the different areas; associate with the multiple estimates of the different areas timing information indicative of a timing of the receiving of the multiple echoes to a computer; and obtain by an acoustic based location device, location information readings related to locations of the device at multiple points of time.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: April 24, 2018
    Assignee: APM AUTOMATION SOLUTIONS LTD
    Inventors: Avishai Bartov, Yossi Zlotnick
  • Patent number: 9947231
    Abstract: Methods and systems for controlling the flight of aircraft are disclosed. An example method includes in response to a first time of arrival at a first waypoint, determining first cruise speeds and corresponding first descent speeds for the first waypoint at the first time of arrival; in response to a second time of arrival at a second waypoint, determining second cruise speeds and corresponding second descent speeds for the second waypoint at the second time of arrival, at least one of the first waypoint or the second waypoint being in a descent phase of a flight; identifying a third cruise speed and a third descent speed based on the first cruise and descent speeds and the second cruise and descent speeds, the first cruise and descent speeds including the third cruise speed and the third descent speed, the second cruise and descent speeds including the third cruise speed and the third descent speed; and identifying a trajectory of an aircraft that satisfies the third cruise speed and the third descent speed.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: April 17, 2018
    Assignee: The Boeing Company
    Inventor: David Garrido Lopez
  • Patent number: 9846229
    Abstract: The various technologies presented herein relate to utilizing direction of arrival (DOA) data to determine various flight parameters for an aircraft A plurality of radar images (e.g., SAR images) can be analyzed to identify a plurality of pixels in the radar images relating to one or more ground targets. In an embodiment, the plurality of pixels can be selected based upon the pixels exceeding a SNR threshold. The DOA data in conjunction with a measurable Doppler frequency for each pixel can be obtained. Multi-aperture technology enables derivation of an independent measure of DOA to each pixel based on interferometric analysis. This independent measure of DOA enables decoupling of the aircraft velocity from the DOA in a range-Doppler map, thereby enabling determination of a radar velocity. The determined aircraft velocity can be utilized to update an onboard INS, and to keep it aligned, without the need for additional velocity-measuring instrumentation.
    Type: Grant
    Filed: March 11, 2015
    Date of Patent: December 19, 2017
    Assignee: National Technologies & Engineering Solutions of Sandia, LLC
    Inventors: Armin W. Doerry, Douglas L. Bickel, Richard M. Naething, Volker Horndt
  • Patent number: 9733349
    Abstract: An apparatus is for use with an aircraft radar system having a radar antenna. The apparatus comprises processing electronics are configured to receive radar data associated with the radar antenna of the system. The processing electronics are also configured to detect periodic data associated with runway lights in the radar data.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: August 15, 2017
    Assignee: Rockwell Collins, Inc.
    Inventors: Robert B. Wood, Carlo L. Tiana, Nathaniel S. Kowash, Richard D. Jinkins, Richard M. Rademaker
  • Patent number: 9645222
    Abstract: Provided herein is a compact and economical direction finding antenna using a mono-pulse antenna system, where a plurality of antenna elements are disposed in a circular array. The directional antennas may be formed by any type of antenna element, including a patch or reflector. The antenna beams of the directional antenna elements overlap, so that from any azimuthal direction, the point is covered by more than one antenna beam. Signals from each pair of adjacent antenna elements of the circular array are processed in order to determine the angle of arrival of a received signal.
    Type: Grant
    Filed: August 8, 2012
    Date of Patent: May 9, 2017
    Assignee: Trimble Navigation Limited
    Inventors: Joseph M. Carey, Russell Brinkmann
  • Patent number: 9599517
    Abstract: A circuit includes sensing circuitry including at least one sensing element configured to output at least one temperature-dependent voltage. A compare circuit is configured to generate at least one intermediate voltage in response to comparing the at least one temperature-dependent voltage to a feedback voltage. A control circuit is configured to generate at least one control signal in response to the intermediate voltage. A switching circuit is configured to couple a capacitor coupled to a feedback node to one of a first voltage supply and a second voltage supply in response to the at least one control signal to generate an output signal having a pulse width that is based on a temperature sensed by the sensing circuitry.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: March 21, 2017
    Assignee: Taiwan Semiconductor Manufacturing Co., Ltd.
    Inventors: Szu-Lin Liu, Jaw-Juinn Horng, Yung-Chow Peng
  • Patent number: 9541651
    Abstract: Approaches to signal processing using tapered coherent integration time period durations. In this regard, signal processing of received signals (e.g., received satellite navigation signals) may be received at a receiver. The received signals may be processed in a coherent integration process whereby the duration of subsequent coherent integration time periods are reduced in response to errors resulting from frequency instability that grows in time. As such, relatively long durations for coherent integration times may result in improved signal to noise ratios (SNRs) for integrated signals in initial coherent integration time periods. However, as errors that are introduced into the signal processing due grow over time, the durations of subsequent coherent integration time periods may be reduced, thus reducing the effect of the error in a SNR of resulting integrated signals. In turn, receiver sensitivity may be improved.
    Type: Grant
    Filed: May 1, 2014
    Date of Patent: January 10, 2017
    Assignee: iPosi, Inc.
    Inventor: Christopher Neil Kurby
  • Patent number: 9535156
    Abstract: The present invention relates to methods and systems for electronic countermeasures, and particularly to methods and systems for electronic countermeasures that employ radar jamming devices.
    Type: Grant
    Filed: March 17, 2014
    Date of Patent: January 3, 2017
    Assignee: SRC, INC.
    Inventors: Shawn B. Freed, Thomas J. Vitale, Jr., Michael E. Murphy
  • Patent number: 9488718
    Abstract: An angle-resolving radar sensor for motor vehicles having multiple antenna elements and multiple receive channels, at least two antenna elements connected to the same receive channel together having a directional characteristic having at least two main lobes having different primary sensitivity directions.
    Type: Grant
    Filed: May 16, 2012
    Date of Patent: November 8, 2016
    Assignee: ROBERT BOSCH GMBH
    Inventors: Thomas Binzer, Christian Waldschmidt, Volker Gross, Raphael Hellinger, Goetz Kuehnle, Andre Treptow
  • Patent number: 9473340
    Abstract: Devices and methods for reducing and/or substantially preventing nonlinearities and discontinuities during the translation stage from an I/Q signal into a polar coordinate OFDM signal are provided. By way of example, a method includes receiving an incoming data signal via a processor of a transmitter. The method further includes computing one or more roots of a first function representing a phase component of the data signal, computing a second function representing the phase component, and deriving one or more characteristics of the phase component based on the second function. The method further includes adjusting one of the one or more characteristics in a second domain to establish a substantially finite bandwidth of the phase component.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: October 18, 2016
    Assignee: APPLE INC.
    Inventor: Zohar Agon
  • Patent number: 9423498
    Abstract: In an example method, a vehicle configured to operate in an autonomous mode could have a radar system used to aid in vehicle guidance. The method could include a plurality of antennas configured to transmit and receive electromagnetic signals. The method may also include a one or more sensors configured to measure a movement of the vehicle. A portion of the method may be performed by a processor configured to: i) determine adjustments based on the movement of the vehicle; ii) calculate distance and direction information for received electromagnetic signals; and iii) recover distance and direction information for received electromagnetic signals with the adjustments applied. The processor may be further configured to adjust the movement of the autonomous vehicle based on the distance and direction information with adjustments applied.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: August 23, 2016
    Assignee: Google Inc.
    Inventor: Adam Brown
  • Patent number: 9372261
    Abstract: A radar device according to an embodiment includes a transmission unit, a reception unit, and a processing unit. The transmission unit emits a transmission wave relating to a frequency-modulated transmission signal. The reception unit receives a reflected wave acquired by reflecting the transmission wave on an object as a reception signal. The processing unit detects object data corresponding to the object from the reception signal, outputs the object data to the vehicle control device that controls the vehicle, and removes object data satisfying the removal condition that is a condition used for determining whether or not object data is to be removed from an output target for the vehicle control device and includes at least the distance and the relative speed of the object data with respect to the speed of the vehicle as conditions from output targets for the vehicle control device.
    Type: Grant
    Filed: March 20, 2013
    Date of Patent: June 21, 2016
    Assignee: FUJITSU TEN LIMITED
    Inventors: Masatoshi Aoki, Hisateru Asanuma, Yasuhiro Kurono
  • Patent number: 9304195
    Abstract: An object detection method includes outputting a radio wave, receiving a reflected wave of the radio wave, generating a plurality of object information each indicating a location of each of a plurality of objects with respect to a predetermined reference point based on the radio wave and the reflected wave, calculating a first distance between an observation reference line which represents a shape and a location of a target area for detection preset depending on a target object for detection, and each of the plurality of objects, based on the observation reference line information stored in advance indicating a shape and a location of the observation reference line and the object information, selecting a predetermined number or less of the object information in ascending order of the first distance among the plurality of the object information as the object information to be output, and outputting the selected object information.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: April 5, 2016
    Assignee: FUJITSU LIMITED
    Inventors: Junko Kajiki, Tomonori Ikeya, Mitsuru Ochi, Kazuhiko Shite
  • Patent number: 9304196
    Abstract: The invention relates to a motor vehicle with a radar device (3, 4) which is designed for detecting an object (25) located in a detection zone (7, 8) of the radar device (3, 4), wherein the detection zone (7, 8) is defined by an elevation angle zone (?1, ?2) and an azimuth angle zone (?), wherein the elevation angle zone (?1, ?2) also covers at least such a partial angle zone (?1) which lies within an angle interval of 15° to 90° above a horizontal (33) defined with respect to the motor vehicle (1).
    Type: Grant
    Filed: March 22, 2011
    Date of Patent: April 5, 2016
    Assignee: VALEO Schalter und Sensoren GmbH
    Inventor: Udo Haberland
  • Patent number: 9240628
    Abstract: The present disclosure provides systems and methods associated with an antenna system comprising a tension member configured to be towed by an aerial platform and/or secured to an orbiting satellite. In some embodiments, a first end of the tension member may be secured to the aerial platform and the second end may extend unsecured from the aerial platform at a different elevation than the first end. A plurality of antenna assemblies, each comprising at least one antenna, may be secured to and spaced along the length of the tension member. Each of the plurality of antennas may be adapted for use with a particular frequency or frequency bandwidth. For example, each of the plurality of antennas may be adapted or tuned for one or more frequencies useful for synthetic aperture radar (SAR). In some embodiments, a receiving system, a communication link, and/or an antenna location system may be utilized.
    Type: Grant
    Filed: June 11, 2013
    Date of Patent: January 19, 2016
    Assignee: ELWHA LLC
    Inventors: William D. Duncan, Roderick A. Hyde, Jordin T. Kare, Lowell L. Wood
  • Patent number: 9229101
    Abstract: Systems and methods for creating a narrow vertical pathway of detection that permits the enforcement of a fixed “exclusion zone” that is narrow and does not widen with range. An advantage to this approach is that the zone or corridor does not widen with range, permitting a fixed exclusion zone that will ignore items that will pass above or below the wing. An exemplary system located on a vehicle includes at least two vertically separated antennas that receive radar reflection signals, a processor, and an output device. The processor receives the radar reflection signals received by the antennas, determines vertical position of any obstacles identified in the radar reflection signals and determines if the obstacles are within a predefined alert zone. The output device outputs an alert if any obstacle is within the alert zone. The predefined alert zone is related to a protruding portion of the vehicle.
    Type: Grant
    Filed: May 21, 2013
    Date of Patent: January 5, 2016
    Assignee: Honeywell International Inc.
    Inventors: James C Kirk, Long Bui, David C Vacanti, Catherine L Freeman
  • Patent number: 9229100
    Abstract: A phased array radar apparatus and method for identifying targets in an environment includes a phased array radar transmitter, a first phased array radar receiver, a second phased array radar receiver, and a radar controller. The first and second phased array radar receivers are configured such that the first and second phased array radar receivers have effectively the same configuration. The radar controller uses the first and second receive beams to calculate an amplitude monopulse ratio and identify angle information of the targets within the environment. The present invention enables high precision estimation of target angle information while scanning over a wide field of view in a single scan. The radar apparatus further uses a complex amplitude monopulse ratio and a weighted target angle histogram to distinguish between closely separated targets that would otherwise be viewed as a single target by conventional monopulse radar apparatuses.
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: January 5, 2016
    Assignee: Toyota Motor Engineering & Manufacturing North America, Inc.
    Inventors: Jae Seung Lee, Paul Donald Schmalenberg, Liping Li
  • Patent number: 9194940
    Abstract: Provided is a signal processing apparatus configured to calculate an angle of a detection point corresponding to an object on the basis of received signals of a plurality of array antennas. A beat signal is generated by a difference between a transmitted signal and a received signal. Digital data is derived through AD conversion of the beat signal. The digital data is divided into a plurality of data groups. A fast Fourier transform is performed on the data groups to acquire a plurality of transformed data corresponding to the number of the data groups. The transformed data are divided into a plurality of sets, correlation matrices for the respective sets are acquired, and an average value of the correlation matrices is calculated. The angle of the detection point is calculated on the basis of the average value of the correlation matrices.
    Type: Grant
    Filed: July 18, 2012
    Date of Patent: November 24, 2015
    Assignee: FUJITSU TEN LIMITED
    Inventor: Hisateru Asanuma
  • Patent number: 9121930
    Abstract: An apparatus for determining the position of a target object using a two-channel monopulse radar. The radar may include two transmitting antennas and one common receiving antenna disposed in a coplanar arrangement. The transmitting antennas may be positioned on the focal plane of the radar along a focal plane axis that extends through, and that is perpendicular with, a boresight axis of the radar. The transmitting antennas may be spaced apart from one another in a first dimension a distance equal to about one half of one wavelength of the radar's center operating frequency. One of the transmitting antennas may be squinted at an angle of ?1 relative to the boresight axis and the other transmitting antenna may be squinted at an angle of ?2 relative to the boresight axis in a second dimension. The transmitting antennas are not squinted relative to one another in the first dimension.
    Type: Grant
    Filed: June 25, 2012
    Date of Patent: September 1, 2015
    Assignee: Autoliv ASP, Inc.
    Inventors: Xueru Ding, Jeff Schaefer, Matthew Marple
  • Patent number: 9024811
    Abstract: A processing device for providing radar data onto a local area network includes an analog-to-digital converter operable to receive analog radar data from an antenna and converter operable to convert the analog radar data into digital radar data. An interference rejector removes radar signals of other antennas from the digital radar data. A range bin decimator limits the digital radar data to a threshold number of range bins. A trigger-to-azimuth converter associates the digital radar data to particular azimuths of rotation of the antenna. A local area network manager places the digital radar data onto a local area network. The processing device may be located in the pedestal with the antenna. A plurality of processing devices associated with a plurality of antennas may provide digital radar data onto the local area network.
    Type: Grant
    Filed: May 12, 2009
    Date of Patent: May 5, 2015
    Assignees: Raytheon Anschutz GmbH, Raytheon Company
    Inventors: Carsten Reiter, Steffen Kröger, Meinhard Wohlgemuth, Thomas Edward Wood
  • Patent number: 9019152
    Abstract: A standard wafer is provided including a substrate; a first layer of semiconductor material formed on the substrate; a bar formed over the first layer of semiconductor material with an interlayer interposed therebetween; and a first sidewall spacer and a second sidewall spacer formed on the opposite sides of the bar respectively, in which the bar and the first layer of semiconductor material are formed of a same semiconductor material, and the interlayer interposed between the first layer of semiconductor material and the bar is formed of a first oxide, and the first sidewall spacer and the second sidewall spacer are formed of a second oxide. A corresponding fabrication method of the standard wafer is also provided.
    Type: Grant
    Filed: February 1, 2013
    Date of Patent: April 28, 2015
    Assignee: Semiconductor Manufacturing International Corporation (Shanghai)
    Inventors: BoXiu Cai, YanLei Zu
  • Patent number: 8994581
    Abstract: In an example method, a vehicle is configured with a radar system used to aid in vehicle guidance. The method could include an array of antennas plurality of antennas configured to receive a radar signal. The array of antennas has a respective spacing between the given antenna and an adjacent antenna; however, the plurality of spacings includes at least two different spacings. A portion of the method may be performed by a processor configured to calculate a detection channel, based on a difference between differential phases associated with two antenna pairs in the array. The processor may also calculate an unambiguous angle based on the detection channel and the plurality of antenna spacings. Additionally, the processor may control the radar unit based on the calculated unambiguous angle.
    Type: Grant
    Filed: September 25, 2012
    Date of Patent: March 31, 2015
    Inventor: Adam Brown
  • Publication number: 20150061921
    Abstract: An apparatus for determining the position of a target object using a two-channel monopulse radar. The radar may include two transmitting antennas and one common receiving antenna disposed in a coplanar arrangement. The transmitting antennas may be positioned on the focal plane of the radar along a focal plane axis that extends through, and that is perpendicular with, a boresight axis of the radar. The transmitting antennas may be spaced apart from one another in a first dimension a distance equal to about one half of one wavelength of the radar's center operating frequency. One of the transmitting antennas may be squinted at an angle of ?1 relative to the boresight axis and the other transmitting antenna may be squinted at an angle of ?2 relative to the boresight axis in a second dimension. The transmitting antennas are not squinted relative to one another in the first dimension.
    Type: Application
    Filed: June 25, 2012
    Publication date: March 5, 2015
    Applicant: AUTOLIV, INC.
    Inventors: Xueru Ding, Jeff Schaefer, Matthew Marple
  • Publication number: 20150061923
    Abstract: A phase monopulse radar system includes a transmitting antenna that transmits a transmission signal, a plurality of receiving antennas that receive reflected waves of the transmission signal as received signals, a target azimuth detecting unit that detects an azimuth of a target based on a phase difference of the received signals received by the receiving antennas, a phase inversion determining unit that determines whether a phase inversion occurs to any one of the received signals, at around a peak frequency of a frequency spectrum of the received signal, and a detection object excluding unit that does not use an azimuth based on the phase difference as a target azimuth, when the phase inversion determining unit determines that the phase inversion occurs.
    Type: Application
    Filed: April 2, 2013
    Publication date: March 5, 2015
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yoh Sato, Akihiro Yanai, Kiyomi Nagamiya, Kazumichi Nishida, Takashi Yamada, Masaru Ogawa
  • Publication number: 20150048970
    Abstract: An angularly resolving radar sensor having multiple antenna elements that, in a direction in which the radar sensor is angularly resolving, are disposed in different positions, and having a control and evaluation device that is designed for an operating mode in which several of the antenna elements transmit signals that are respectively received by several of the antenna elements, and the angle (?) of a located object is identified on the basis of amplitudes and/or phase relationships between signals which correspond to different configurations of transmitting and receiving antenna elements, wherein the control and evaluation device is embodied to supply several of the transmitting antenna elements simultaneously with identical-frequency signals (f1-f4) in such a way that the common phase center of said signals is located between the positions of two adjacent antenna elements.
    Type: Application
    Filed: June 23, 2014
    Publication date: February 19, 2015
    Applicant: ROBERT BOSCH GMBH
    Inventor: Michael SCHOOR
  • Patent number: 8933836
    Abstract: A multiple beam receiving system provides an angle estimate to targets. The system tracks movements of the targets over time and generates calibration information. The system uses the calibration information to more accurately estimate angle-to-target. The multiple beam receiving system can be part of a monopulse or other radar system, a traffic collision avoidance system, or other electromagnetic sensor.
    Type: Grant
    Filed: September 30, 2011
    Date of Patent: January 13, 2015
    Assignee: Rockwell Collins, Inc.
    Inventors: Daniel L. Woodell, Jeffery A. Finley, David L. Van Dusseldorp
  • Patent number: 8896483
    Abstract: Method of automatic target angle tracking by sum-and-difference monopulse radar covers radiolocation sphere and specifically monopulse direction finding systems. It can be used in order to increase guidance accuracy, for example, for anti aircraft missiles and of unmanned aerial vehicles to radar targets such as: radio beacons; aerial vehicles reflecting the radio signal that illuminates them; aerial vehicles and ground-based devices radiating radio signals and jamming signals. The aim of the method consists in the assurance of reliability and stability and in the enhancement of guidance accuracy of automatic target angle tracking due to elimination of automatic tracking losses and great errors arising during the influence of the signals of orthogonal polarization or polarization close to it. The proposed method provides full protection from polarization jamming for all types of monopulse radars.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: November 25, 2014
    Inventor: Evgeny Markin
  • Patent number: 8884810
    Abstract: A system and method for a single site beacon transceiver including an omni-directional transceiver, a plurality of directional receiving antennas for receiving a signal, and a digital receiver for processing the signal to determine an azimuth to the source of the received signal. The digital receiver includes a plurality of receiver channels that are calibrated periodically and at least one processor that estimates a coarse signal azimuth for the signal by calculating an amplitude monopulse ratio for the signal using the two directional receiving antennas receiving the highest amplitude signal, and estimates a final signal azimuth for the signal using an interferometer baseline between the two directional receiving antennas or, alternately, subtracts the complex ratio of the measurements from the complex ratio of the antenna array RF model to determine the angle corresponding to the minimum of the absolute value of the difference.
    Type: Grant
    Filed: September 29, 2009
    Date of Patent: November 11, 2014
    Assignee: Saab Sensis Corporation
    Inventor: Elyahu Perl
  • Patent number: 8854257
    Abstract: A Luneburg lens is used in conjunction with a patch antenna array. The patch antenna array is conformed or adapted to cover a portion or backside of the Luneburg len's surface with the backplane of the conformed antenna array defining a field of regard (FOR) in which objects are detected and tracked. A processor is connected to a receiver/exciter module which connects to transmit/receive modules which are connected to the individual patch antennas through a network of MEMS switches. In a receive mode, selected subarrays of the conformed patch antenna array are scanned during selected time intervals with the sum and delta beams being formed coherently in amplitude and phase to realize amplitude monopulse sensing and angle tracking of an object.
    Type: Grant
    Filed: October 22, 2012
    Date of Patent: October 7, 2014
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Christopher A. Hamner, Robert A. Spencer
  • Publication number: 20140292561
    Abstract: A radar system including a plurality of mini radars may be conformable to a structure that it is attached or built into. A radar system includes a clock, a plurality of frequency modulated/continuous wave (FM/CW) radar units in signal communication with the clock and a processor in signal communication with the plurality of FM/CW radar units. Each of the plurality of FM/CW radar units includes a row of antenna elements.
    Type: Application
    Filed: December 16, 2013
    Publication date: October 2, 2014
    Applicant: Honeywell International Inc.
    Inventors: David C. Vacanti, Marc Pos
  • Patent number: 8816897
    Abstract: A method of estimating the angular position ?c of a target detected by a radar equipping a mobile carrier and emitting, via an steerable antenna, a signal, in the form of pulses, towards the target and receiving echoes from the reflection of said signal on the target, comprises: estimating, for each pulse or group of pulses of time index i, the angular position ?(i) of the antenna; estimating, for each pulse or group of pulses of time index i, the Doppler frequency fD(i) of the echo or echoes received; pairing, for each pulse or group of pulses of time index i, the angular position ?(i) and the Doppler frequency fD(i); and, estimating the angular position ?c at least by solving the equation ? ? ? f D ? ( i ) 2 = V a ? sin ? ? ? ? ( i ) ? ( ? c - ? ? ( i ) ) + V r , c , where ? is the wavelength of the radar, Va is the norm of the speed of the carrier and Vr,c is the radial speed of the target.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: August 26, 2014
    Assignee: Thales
    Inventors: Nicolas Bon, Jean-Michel Quellec
  • Patent number: 8816895
    Abstract: Embodiments of a target classifier and method for target classification using measured target epsilons and target glint information are generally described herein. The target classifier is configured to compare a total epsilon measurement with target glint information to determine whether to the target being tracked corresponds to an intended target type. Based on the comparison, the target classifier may cause target tracking circuitry of a target-tracking radar to either continue tracking the target or break-off from tracking the target. Glint of different target types may be characterized at different ranges and the target's glint characteristics may be used to distinguish intended from non-intended targets. Accordingly, intended targets such as incoming artillery may be distinguished from non-intended targets such as aircraft to help prevent countermeasures from being launched against non-intended targets.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: August 26, 2014
    Assignee: Raytheon Company
    Inventors: Brett J. Young, Jason A. Johnson
  • Patent number: 8760340
    Abstract: In certain embodiments, an apparatus comprises range matched filters and a Doppler-acceleration matched filter system. The matched filters are configured to receive radar return signals detected by an antenna and range match filter the radar return signals to place the radar return signals into range cells. The Doppler-acceleration matched filter system is configured to Doppler-acceleration process the radar return signals in the range cells to facilitate identification of one or more targets.
    Type: Grant
    Filed: July 8, 2010
    Date of Patent: June 24, 2014
    Assignee: Raytheon Company
    Inventor: Winthrop W. Smith