Сводная информация о патентах США
(тематическая подборка из подгруппы МПК G01S13/48)
| N п/п | Номер патента | Название | Реферат | Автор(ы) | Заявитель(ли) | Приоритет | Дата выдачи | МПК | Номер заявки |
| 1 | 8373591 | System for sensing aircraft and other objects | A system for sensing aircraft and other objects uses bistatic radar with spread-spectrum signals transmitted from remotely located sources such as aircraft flying at very high altitudes or from a satellite constellation. A bistatic spread spectrum radar system using a satellite constellation can be integrated with a communications system and/or with a system using long baseline radar interferometry to validate the digital terrain elevation database. The reliability and safety of TCAS and ADS-B are improved by using the signals transmitted from a TCAS or ADS-B unit as a radar transmitter with a receiver used to receive reflections. Aircraft and other objects using spread spectrum radar are detected by using two separate receiving systems. Cross-Correlation between the outputs of the two receiving systems reveals whether a noise signal is produced by the receiving systems themselves or is coming from the outside | Margolin Jed (VC Highlands, NV), Margolin Jed (VC Highlands NV) | --- | 22.10.2010 | 12.02.2013 | G01S13/48, G01S13/93 | 12/910779 |
| 2 | 7786928 | Monostatic planar multi-beam radar sensor | A monostatic multi-beam radar sensor for motor vehicles, having a group antenna, a planar lens having multiple inputs, and a homodyne mixer system, wherein the mixer system comprises multiple transfer mixers that are connected in parallel to the inputs of the lens | Hansen Thomas (Hildesheim, DE), Schneider Martin (Hildesheim, DE), Schoebel Joerg (Salzgitter, DE), Brueggemann Oliver (Ilsede, DE) | Robert Bosch GmbH (Stuttgart, DE) | 18.07.2005 | 31.08.2010 | G01S13/48, G01S7/02, G01S7/35, G01S13/00, G01S13/93, G01S7/032, G01S7/036, G01S13/931, H01Q25/008 | 11/662304 |
| 3 | 7626536 | Non-scanning radar for detecting and tracking targets | Radar for detecting and tracking short range airborne targets using a non-scanning beam to illuminate the entire search space, and processing the return signals from a plurality of spaced apart receive antennas. Target angle in one plane may be determined by coherent processing of the returns from the plurality of receive antennas. Spacing the receive antennas apart in three dimensions allows determining of two angles, such as azimuth and elevation. Processing of the returns may be coherent or noncoherent, or returns may be processed both coherently and noncoherently. Programmability of the processing algorithms and parameters provide flexibility in applications, as well as flexibility based on such things as the target type and its range. Exemplary applications are disclosed | Rihaczek August W. (Rolling Hills, CA), Mitchell Richard L. (Palos Verdes, CA) | MARK Resources, Inc. (Torrance, CA) | 26.04.2005 | 01.12.2009 | G01S13/48, G01S3/46, G01S7/35, G01S13/343, G01S13/46 | 11/115487 |
| 4 | 7548186 | Method and apparatus for detection of an electromagnetic signal reflected from and object | For detection of an electromagnetic signal, which is transmitted from a transmitting antenna (1), by means of at least two at least essentially identical receiving antennas (3, 4), whose sensitivity curve has a maximum (M) with falling flanks as well as sidelobes (SL) adjacent to it with sensitivity increased again at a reception angle symmetrically with respect to a basic alignment, with angle determination for an object which reflects the transmitted signal being carried out by the two receiving antennas (3, 4) by phase determination in an unambiguous interval (.theta..sub.u) whose boundaries (L) are predetermined by the distance (d) between the receiving antennas (3, 4), the distance (d) is chosen such that the boundaries (L) of the unambiguity area (.theta..sub.u) intersect the sidelobes (SL), and the reflective object is detected by means of vectorial addition of the signals from the receiving antennas (3, 4), after which the parameters R, v are determined | Mende Ralph (Braunschweig, DE), Behrens Marc (Konigslutter, DE) | S.M.S. Smart Microwave Sensors GmbH (Braunschweig, DE) | 15.08.2005 | 16.06.2009 | G01S13/48, G01S13/93, G01S7/352, G01S13/4454, H01Q19/021, G01S13/003, G01S13/931 | 11/203439 |
| 5 | 7468689 | System and method for determining position of radar apparatus based on reflected signals | A system and method for determining position of, for example, a robot based on reflected signals comprises a transmitter for transmitting signals in a number of directions within a range of directions and a receiver for receiving echoes of the signals from any direction in the range. The transmitter has a first rotatable antenna and the receiver has a second rotatable antenna which is mechanically couplable to the second antenna. The received echoes are processed by a processor to derive echo data signals indicative of the distance of the system to one or more reflective surfaces and the direction of the reflective surface(s) relative to the system. The processor is arranged to determine the position of the system relative to a starting position from the derived echo data signals indicative of the distance of the system to the reflective surface(s) and the direction of the reflective surface(s) relative to the system | Ma Yugang (Singapore, SG), Sun Xiaobing (Singapore, SG), Xu Jin (Singapore, SG), Okada Kanzo (Singapore, SG) | Sony Corporation (Tokyo, JP) | 28.06.2005 | 23.12.2008 | G01S13/42, G01S13/48, G01S7/03, G01S13/0209, G01S13/06 | 11/169119 |
| 6 | 6903678 | Vehicle radar apparatus | A vehicle radar system extracts peak frequencies fbu and fbd of respective beat signals B1 to B9 representing the frequency difference between a transmission signal fs and a plurality of received signals fr1 to fr9. The phase difference of respective beat signals B1 to B9 at the peak frequencies fbu and fbd is converted into a frequency signal. In the case of reflection from a close range road surface or raindrops, the phase difference of each beat signal is irregular. The peak frequency intensity of a converted frequency signal is small. This system compares the peak frequency intensity of the converted frequency signal with predetermined criterion intensity. Then, the system identifies an objective with a close range road surface or raindrops when the peak frequency intensity of the converted frequency signal is not larger than the predetermined criterion intensity | Kumon Hiroaki (Kariya, JP), Tamatsu Yukimasa (Okazaki, JP) | Denso Corporation (Kariya, JP) | 27.01.2004 | 07.06.2005 | G01S13/34, G01S13/48, G01S13/00, G01S13/93, G01S013/95, G01S13/345, G01S13/48, G01S13/5244, G01S13/931 | 10/764551 |
| 7 | 6900754 | Signal processing method for use with scanning radar | A method that can locate the center of a target even when the target is a large vehicle, and that, when a plurality of beams are reflected, determines whether the reflected beams are from the same target or not, wherein, of peaks generated based on a radar signal reflected from the target, peaks whose frequencies are substantially the same and whose reception levels are not smaller than a predetermined value are selected and, when a plurality of such peaks are selected, a center angle between the angles of the leftmost and rightmost peaks is obtained, and the thus obtained center angle is taken as an angle representing the target. Further, the plurality of peaks are paired up to detect a distance, relative velocity, and displacement length for each of reflecting points on the target, and when the differences in these values are all within respectively predetermined values, the plurality of peaks are determined as being peaks representing the same target | Ono Daisaku (Kobe, JP), Kishida Masayuki (Kobe, JP) | Fujitsu Tem Limited (Hyogo, JP) | 21.11.2002 | 31.05.2005 | G01S13/34, G01S13/48, G01S13/93, G01S13/42, G01S13/00, G01S13/58, G01S7/02, G01S7/41, G01S013/93, G01S007/292, G01S13/345, G01S13/42, G01S13/48, G01S13/931, G01S7/41, G01S7/411, G01S13/422, G01S13/584, G01S2013/9321, G01S2013/9325, G01S2013/9342, G01S2013/9346, G01S2013/935, G01S2013/9353, G01S2013/9375 | 10/297343 |
| 8 | 6856280 | Method and radar system for determining the directional angle of radar objects | A method for determining the directional angle of radar objects using a multibeam radar, including the steps of: (a) recording the frequency spectra of the radar echoes for a plurality of beams: (b) seeking a measuring frequency near a frequency maximum assigned to the radar object: and (c) comparing the phases and/or amplitudes of the radar echoes at the measuring frequency with reference patterns known for various directional angles, steps (b) and (c) being executed repeatedly, each time for different measuring frequencies, and the directional angles obtained for the various measuring frequencies being checked for consistency | Eder Sonja (Koengen, DE), Budiscak Benoit (Sachsenheim, DE) | Robert Bosch GmbH (Stuttgart, DE) | 14.07.2003 | 15.02.2005 | G01S13/00, G01S13/48, G01S13/42, G01S13/34, G01S13/58, G01S013/06, G01S013/93, G01S13/424, G01S13/48, G01S13/345, G01S13/584 | 10/618973 |
| 9 | 6762711 | Method for detecting target objects and for determining their direction and the like for a radar device | In a method for detecting target objects and determining their direction, range, speed and the like for a radar device, the invention provides that at least three transmitting and receiving devices for radar beams are arranged in such a manner that their beam fields (a, b, c, d, e) form the dectection area of the radar device, and the at least three transmitting and receiving devices are activated and deactivated successively in such a manner that at least two adjacent transmitting and recieving devices are activated simultaneously | Doerfler Reiner (Lappersdorf, DE) | Siemens Aktiengesellschaft (Munich, DE) | 09.07.2001 | 13.07.2004 | G01S13/87, G01S13/93, G01S13/48, G01S13/44, G01S13/00, G01S013/93, G01S013/44, G01S13/4409, G01S13/48, G01S13/87, G01S13/931, G01S2013/9375 | 09/869937 |
| 10 | 6646589 | Radar designed to minimize error in detecting target | An FMCW radar is provided which may be employed in automotive anti-collision or radar cruise control systems. In a distance measuring mode, only one of channels is used to sample a beat signal continuously, thereby allowing a sampling frequency to be increased up to Nc times that in an azimuth measuring mode and a sweep time in which a transmit signal sweeps in frequency upward and downward cyclically to be minimized. This causes half the sampling frequency to be higher than a frequency component arising sufficiently from a distant target present outside a preset radar range, thereby eliminating an error in detecting the distant target as being located inside the preset radar range | Natsume Kazuma (Kariya, JP) | Denso Corporation (Kariya, JP) | 12.09.2002 | 11.11.2003 | G01S13/34, G01S13/58, G01S13/00, G01S7/02, G01S7/35, G01S13/93, G01S13/48, G01S013/93, G01S7/352, G01S13/345, G01S13/347, G01S13/584, G01S13/48, G01S13/931 | 10/241606 |
| 11 | 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 angle of the multibeam radar system with respect to a predefined target, a plurality of laterally arranged cutting planes at a predefined distance are formed. The values of the corresponding antenna diagrams in each plane are stored in a suitable form, for example, normalized and in a parametric the size of the memory, it is sufficient to store one symmetry half for reasons of symmetry if additional information, for example, road clutter values are added, so that the upward or downward direction of the angle can be recognized. By comparing the measured echo values obtained by normalization and application of a quality factor, a corresponding elevation angle .alpha. is obtained for each cutting plane. Using an appropriate histogram, an angle for the maladjustment of radar sensor can be determined from the measured values stored over a longer period of time | Winter Klaus (Schwieberdingen, DE), Wagner Klaus-Peter (Stuttgart, DE), Eder Sonja (Koengen, DE), Olbrich Herbert (Rutesheim, DE), Schneemann Jorg (Weissach, DE) | Robert Bosch GmbH (Stuttgart, DE) | 11.10.2001 | 05.11.2002 | G01S13/00, G01S13/48, G01S13/42, G01S13/93, G01S7/40, G01S7/295, G01S007/40, G01S013/44, G01S7/4026, G01S13/424, G01S13/48, G01S7/295, G01S13/931 | 09/807196 |
| 12 | 6414631 | Time sharing type multi-beam radar apparatus having alternately arranged transmitting antennas and receiving antennas | In a time sharing type multi-beam radar apparatus, a plurality of transmitting antennas are arranged in a first row, and each of the transmitting antennas has a first antenna pattern. Also, a plurality of receiving antennas are arranged in a second row in parallel with the first row, and each of the receiving antennas has a second antenna pattern. The first and second antenna patterns adjacent to each other spatially and partly overlap each other | Fujimoto Naoya (Tokyo, JP) | NEC Corporation (Tokyo, JP) | 05.10.2000 | 02.07.2002 | G01S13/00, G01S13/48, G01S7/03, H01Q1/32, H01Q25/00, G01S13/93, G01S003/28, G01S7/03, G01S13/48, H01Q1/3233, H01Q25/007, H01Q25/008, G01S13/931 | 09/679608 |
| 13 | 6380884 | Radar apparatus | A radar apparatus is provided that can correctly extract the necessary point for a determination related to the safe travel of one's automotive vehicle among objects such as automotive vehicles moving at an angle in front and constructed objects. The radar apparatus of the present invention provides antennas that transmit beams in a plurality of directions and receive the reflected waves from objects as received signals. The objects that generated these reflected waves are detected. In addition, this radar apparatus provides a reflected location detection device that detects the reflected locations that are the generation source of the reflected waves for this plurality of directions, a grouping device that groups each of these detected reflected locations into a group of single or plural reflected locations assuming they belong to the same object, and a device that extracts reflected locations having the shortest distance from the moving body from among these grouped reflected locations to serve as reference points related to the safe travel of this moving body | Satou Kazuhisa (Wako, JP), Tohya Ken-i-chi (Wako, JP), Sugawara Takashi (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 11.01.2000 | 30.04.2002 | G01S13/00, G01S13/93, G01S13/48, G01S13/50, G01S13/42, G01S013/93, G01S013/48, G01S13/42, G01S13/48, G01S13/505, G01S13/931, G01S2013/9375 | 09/481068 |
| 14 | 6369700 | On-vehicle DBF radar apparatus | An on-vehicle DBF radar apparatus is mounted on a vehicle and is arranged to detect an object around the vehicle by scanning with radar beams synthesized by digital signal processing. The radar apparatus has a lane shape acquiring section for acquiring a shape of a lane on which the vehicle is driving. In the radar apparatus a scanning range of the radar beams is limited according to the shape of the lane acquired by the lane shape acquiring section. The radar apparatus has advantages of high detection rate and detection accuracy | Yamada Yukinori (Susono, JP) | Toyota Jidosha Kabushiki Kaisha (JP) | 24.08.1999 | 09.04.2002 | G01S13/00, G01S13/93, G01S13/34, G01S13/48, G01S13/42, G01S7/02, G01S7/35, B60Q001/00, G01S7/35, G01S13/34, G01S13/42, G01S13/48, G01S13/931, G01S2013/9375 | 09/379793 |
| 15 | 6363326 | Method and apparatus for detecting an object on a side of or backwards of a vehicle | A method and apparatus are described for detecting obstacles in the "blind spot" of a motor vehicle's side mounted mirrors. Advantageously, the inventive apparatus is mounted on the vehicle as an attachment to the side mirror system or adjacent to it. The invention determines the presence of an obstacle in a sensing volume that encompasses the "blind spot". The invention relies on the time-of-flight measurement of preferably short infrared pulses to locate obstacles. Multiple sensors are used to provide area coverage. If any sensor detects an obstacle within its predefined range limits then an indication is provided by a display unit at the side mirror location. The system can be used on both sides of the vehicle and each side operates independently | Scully Robert Lawrence (Verona, NJ), Family ID | --- | 27.11.2000 | 26.03.2002 | G01S13/00, G01S13/93, G01S13/48, B60R21/01, G08G001/16, G01S13/48, G01S13/931, B60R21/0134, G01S2013/9332, G01S2013/9367, G01S2013/9375, G01S2013/9385 | 09/722224 |
| 16 | 6337656 | Monopulse radar apparatus | A radar apparatus is provided which is capable of discriminating between azimuth angles of two or more targets moving side by side close to each other. The radar apparatus provides antenna beams which partially overlap with each other to define a plurality of monopulse areas and processes input signals produced in each of the monopulse areas to obtain angular direction data. The radar apparatus determines a time-sequential variation in angular direction data in each of the monopulse areas and determines the angular direction data whose variation is within a preselected allowable range as being effective in determining the angular direction of each target correctly | Natsume Kazuma (Kariya, JP), Hazumi Hiroshi (Nagoya, JP), Kumon Hiroaki (Kariya, JP) | Denso Corporation (Kariya, JP) | 01.06.2000 | 08.01.2002 | G01S13/00, G01S13/48, G01S13/44, G01S13/87, G01S013/00, G01S13/44, G01S13/48, G01S13/87 | 09/583534 |
| 17 | 6292129 | Structure of radar system with multi-receiver channel | A radar apparatus is provided which includes a transmitter, a receiver, and a signal processor. The transmitter produces a transmit signal which is so modulated in frequency as to change with time cyclically and transmits the transmit signal as a radar wave. The receiver selectively establishes communication with one of receiving antennas and changes the communications with the receiving antennas in sequence in a cycle shorter than a cycle of a change in the frequency of the transmit signal to supply a series of signal components of input signals produced by the receiving antennas. The receiver mixes the series of signal components with a local signal having the same frequency as that of the transmit signal to produce a beat signal. The signal processor samples the beat signal to analyze frequency components thereof to determine the distance to, relative speed and azimuth of a target. These arrangements result in simplicity of the whole structure of the radar apparatus, thereby allowing radar information about the target to be obtained accurately by the compact structure | Matsugatani Kazuoki (Kariya, JP), Hazumi Hiroshi (Nagoya, JP) | Denso Corporation (Kariya, JP) | 30.03.2000 | 18.09.2001 | G01S13/00, G01S13/58, G01S13/34, G01S13/42, G01S7/02, G01S7/35, G01S13/48, G01S13/93, G01S013/93, G01S013/42, G01S7/352, G01S13/345, G01S13/42, G01S13/584, G01S13/48, G01S13/931 | 09/538500 |
| 18 | 6229597 | Object detecting device | An area is divided by a plurality of parallel lines parallel to a vehicle body axis CL of a vehicle V, into fifteen detection areas K1 to K15 each having a width of 1.6 m, and each of the detection areas K1 to K15 is divided by a distance address at a distance of every 0.5 m to define a large number of measure-shaped regions. It is determined whether a target T exists in any of the regions, by adding together received reception level signals of laser beams reflected in the regions and comparing a value resulting from the adding with a threshold value. The widths of the detection areas K1 to K15 assume a constant value irrespective of distance to the target and hence, even when the target T exists at a point closer to the vehicle, the reception level signals of waves reflected from a wider area of the target T can be added together, leading to an enhanced detecting ability | Kikuchi Hayato (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 14.07.1999 | 08.05.2001 | G01S13/00, G01S13/48, G01S13/93, G01S13/04, G01S17/00, G01S17/46, G01S7/03, B60T007/16, G01C003/08, G01B011/26, G01S013/08, G01S7/03, G01S13/04, G01S13/48, G01S13/931, G01S17/42, G01S17/46, G01S17/936 | 09/353281 |
| 19 | 6222486 | Method for the precise angle determination of targets by means of a multiple-unit radar system | In a method for the precise angle determination of targets by means of a multiple unit antenna radar system, individual antenna patterns are generated in separate directions by at least three feeds (F-1, F0, F1) which are spatially offset with respect to one another and which illuminate a joint collimator (R). By simultaneous and phase-correct excitation of several of the feeds, at least two combination antenna diagrams are generated, by means of which the angle determination takes place. The intersecting points of the combination antenna diagrams, are situated in angle ranges in which the exact angle determination is desired | Flacke Joachim (Markdorf, DE), Heckel Kuno (Friedrichshafen, DE), Kaiser Bruno (Oberschopfheim, DE) | Dornier GmbH (Friedrichshafen, DE) | 27.09.1999 | 24.04.2001 | G01S13/00, G01S13/48, G01S005/04, G01S13/48 | 09/406694 |
| 20 | 6184819 | Method of operating a multi-antenna pulsed radar system | A method for operating a radar system using at least two antennas provides an increased angular resolution for determining the angular position, radial velocity, and/or distance to a reflection object. A plurality of successive measuring phases are carried out in at least one measuring process. In each measuring phase, operation is repeatedly switched between a transmitting operation in which a transmitted signal pulse is emitted, and a receiving operation in which reflection signals are detected as received signals in the pulse pause interval between successive transmitted pulses. In at least one measuring phase, two different neighboring antennas of the radar system are used respectively as the transmitting antenna for emitting the transmitted signal and as the receiving antenna for detecting the reflected signal. In this manner, the respective receiving antenna monitors only the angular range of overlap between the emitted beam of the transmitting antenna and the field of view of the receiving antenna. The information provided by the detected signals in this overlapping angular range achieves an increased angular resolution. The method is particularly suitable for operating a separation distance warning system for a motor vehicle | Adomat Rolf (Friedrichshafen, DE), Waibel Franz (Bad Wurzach, DE) | Automotive Distance (Lindau, DE) | 06.07.1999 | 06.02.2001 | G01S13/00, G01S13/48, G01S13/87, G01S13/93, G01S013/536, G01S13/48, G01S13/87, G01S13/931 | 09/348605 |
| 21 | 6147639 | Slow speed pulse chase apparatus | A slow speed pulse chase apparatus in a bistatic radar system, wherein the receive antenna follows the transmit pulse out in space. The receive beam comprises many parallel beams that overlap all the possible positions of the transmit pulse as it travels into space. Slow speed chase apparatus provides a small group of beams which are held in a fixed location as the transmit pulse travels by and then is jumped in one large step to continue to the next position to remain there until the transmit pulse travels by | Jacomini Omar J. (Severna Park, MD) | The United States of America as represented by the Secretary of the Air Force (Washington, DC) | 16.04.1986 | 14.11.2000 | G01S13/00, G01S13/48, H01Q3/26, H01Q25/00, G01S013/48, G01S13/003, G01S13/48, H01Q3/26, H01Q25/00 | 06/883237 |
| 22 | 6137434 | Multibeam radar system | A multibeam radar system includes a multibeam radar module having n (n is a natural number of at least 3) transmitting/receiving channels for transmitting high-frequency signals and receiving echo signals, and a radar circuit for detecting a distance up to an object which produces the echo signals and/or a relative speed of the object from a relationship between the high-frequency signals and the echo signals in the transmitting/receiving channels. The radar circuit includes a channel controller for selecting sets of m (m is a natural number smaller than n) adjacent transmitting/receiving channels sequentially to transmit the high-frequency signals and receive the echo signals in a high-azimuth-resolution mode. The channel controller may also select the transmitting/receiving channels sequentially one by one to transmit the high-frequency signals and receive the echo signals in a low-azimuth-resolution mode | Tohya Ken-i-chi (Wako, JP), Urabe Masanobu (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 14.07.1999 | 24.10.2000 | G01S13/00, G01S13/48, G01S13/34, G01S13/93, G01S7/03, H01Q25/00, H01Q1/32, H01Q1/38, H01Q21/06, G01S007/28, G01S013/93, H01Q001/38, G01S7/023, G01S7/032, G01S13/34, G01S13/48, G01S13/931, H01Q1/3233, H01Q1/38, H01Q21/065, H01Q25/00, G01S2013/0263 | 09/353528 |
| 23 | 6130638 | Method and device for determining an azimuth angle and/or an elevation angle in a multibeam radar system | Method and device for determining an azimuth angle and/or an elevation angle, based on a multibeam radar system, in which the echo signals of each radar target are recorded over at least two beams. The amplitude of an echo signal recorded in each receiving beam is normalized. For each receiving beam, the normalized amplitude is compared to the pattern values determine the angle of a radar target. The comparison results from at least two receiving beams are combined to form an angle-dependent analysis quantity, and the angle whose angle-dependent analysis quantity meets a minimum and maximum criterion is determined to be the angle of the radar target. Included in the angle-dependent analysis quantity is a phase angle of at least two recorded echo signals. This operation can also be performed on the basis of a complex normalization operation | Winter Klaus (Schwieberdingen, DE), Wagner Klaus-Peter (Stuttgart, DE) | Robert Bosch GmbH (Stuttgart, DE) | 29.10.1998 | 10.10.2000 | G01S13/00, G01S13/48, G01S13/42, G01S7/292, G01S7/295, G01S013/00, G01S013/68, G01S7/292, G01S13/42, G01S13/48, G01S7/295 | 09/182449 |
| 24 | 6124823 | Radar apparatus for vehicle | A radar apparatus of the present invention is a radar apparatus for detecting an object around a vehicle, which comprises a transmitter section for radiating a frequency-modulated, transmitted wave a receiver section for receiving a radio wave re-radiated from an object exposed to the transmitted wave and mixing the radio wave received with part of the transmitted wave to obtain beat signals, and a signal processing section for analyzing frequencies of the beat signals to detect the object around the vehicle. This radar apparatus is arranged to set a first threshold value and a second threshold value higher than the first threshold value as to signal levels of a frequency spectrum of the beat signals. The signal processing section is arranged to detect the object around the vehicle, using a beat frequency of a signal level over the second threshold value, and to compare the frequency spectrum with the first threshold value in a predetermined frequency range to determine whether there is dirt on the transmitter section or on the receiver section | Tokoro Setsuo (Susono, JP) | Toyota Jidosha Kabushiki Kaisha (Aichi-ken, JP) | 01.07.1999 | 26.09.2000 | G01S13/00, G01S13/48, G01S13/93, G01S7/292, G01S13/34, G01S7/285, G01S7/288, G01S7/40, G01S013/93, G01S7/2927, G01S13/48, G01S13/931, G01S7/288, G01S7/4021, G01S13/34, G01S2007/2883 | 09/345446 |
| 25 | 6104336 | Radar system and method of operating same | A method of operating a radar system, including the steps of digitally sampling a received signal at a predetermined sampling rate, to periodically provide a set of selected samples, the set of selected samples including positive going ramp samples, negative going ramp samples and CW burst samples and performing a first fast Fourier transform (FFT) on the positive going ramp samples, performing a second fast Fourier transform on the negative going ramp samples and performing a third fast Fourier transform on the CW burst samples is described. Utilizing the subsequent radar operations the method further includes the steps of tracking each resulting signal from the first fast Fourier transform performing steps, tracking each resulting signal from the second fast Fourier transform performing steps and tracking each resulting signal from the third fast Fourier transform performing steps and associating any resulting signals from the tracking steps to periodically provide output signals indicative of other vehicles | Curran Anthony (Brookline, MA), Potts Steven L. (Andover, MA), Crain Arthur (Framingham, MA) | Raytheon Company (Lexington, MA) | 27.09.1999 | 15.08.2000 | G01S13/00, G01S13/48, G01S13/34, G01S13/72, G01S13/42, G01S13/93, G01S7/02, G01S7/35, G01S7/285, G01S013/93, G01S7/352, G01S13/34, G01S13/42, G01S13/48, G01S13/726, G01S13/931, G01S13/345, G01S2013/9321, G01S2013/9325 | 09/406302 |
| 26 | 6075479 | Radar apparatus installed on vehicle for producing correct detecting result | A radar apparatus installed on a vehicle includes a transmission section and a reception section. The transmission section has at least a transmission antenna, and emits a transmission wave toward a detection area in a front of the vehicle. The transmission wave may be reflected by a reflector such as a preceding vehicle to produce reflection wave, and the detection area includes a plurality of sub-areas. The reception section has at least a reception antenna, and receives and detects the reflection wave. A detecting unit detects a reflector indication data indicative of a reflector attribute for every sub-area for a current detection cycle based on the detecting result by the reception section. Also, the detecting unit determines whether the detected reflector indication data are correct, by use of the detected reflector indication data, to determine that the detected reflector indication data are final reflector indication data when it is determined that the detected reflector indication data is correct. A correcting unit corrects an incorrect part of the detected reflector indication data to a correct reflection indication data to produce the final reflector indication data, when it is determined that the part of the detected reflector indication data is not correct. A determining unit determines whether there is the reflector in the detection area, based on the final reflector indication data | Kudoh Hiroshi (Saitama, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 16.02.1999 | 13.06.2000 | G01S13/00, G01S13/93, G01S7/02, G01S7/41, G01S7/292, G01S13/48, G01S13/42, G01S013/93, G01S7/292, G01S7/41, G01S13/931, G01S13/42, G01S13/48 | 09/250376 |
| 27 | 6043772 | Multi-beam automobile radar system | A multi-beam automobile radar system includes at least one antenna that forms a total of at least two antenna lobes. At least one of these antenna lobes serves to transmit and receive radar signals. At least one other antenna lobe serves only to receive radar signals. An advantage of the automobile radar system is that with one antenna lobe which serves only for receiving radar signals, it is possible to eliminate duplexers, for example, in the form of double rat race arrangements | Voigtlaender Klaus (Wangen, DE), Wagner Klaus-Peter (Stuttgart, DE) | Robert Bosch GmbH (Stuttgart, DE) | 21.11.1997 | 28.03.2000 | G01S13/00, G01S13/48, G01S13/93, H01Q9/04, H01Q25/00, H01Q1/32, H01Q19/00, H01Q19/06, G01S13/34, G01S7/03, G01S013/93, G01S13/48, G01S13/931, H01Q1/3233, H01Q9/0407, H01Q19/062, H01Q25/007, G01S7/032, G01S13/34 | 08/975621 |
| 28 | 6012008 | Method and apparatus for predicting a crash and reacting thereto | A method and apparatus are described for predicting a crash and reacting thereto. Advantageously, the inventive apparatus is mounted on a vehicle and determines the time-to-impact for approaching obstacles that are within a limited distance from the host vehicle. The sensing distance from the vehicle is set by signal processing of reflected signals and rejection of all responses corresponding to a distance greater than the preset limiting value. The effect of the invention is the projection of a sensing envelope or barrier outwards from that portion of the vehicle provided with the invention. Intrusion into this envelope is sensed for appropriate action, so as to provide a warning of 10 to 40 milliseconds prior to a collision. The invention relies on time-of-flight measurement of preferably short infrared pulses to locate the obstacle. Multiple sensors are used to provide area coverage and to determine size and extent of the obstacle. For each sensor, an algorithm determines if the measured data indicates a collision. An additional algorithm is used to determine if the signals from all sensors collectively warrant a warning signal to vehicle safety systems. The system can be deployed in the front of the host vehicle for warning of frontal impact, and at the sides for warning of side impact. The system can also be used at the rear for backup obstacle warning. Advantageously, the systems for side, front and back are independent | Scully Robert L. (Verona, NJ), Family ID | --- | 26.08.1997 | 04.01.2000 | G01S13/00, G01S13/48, G01S13/93, B60R21/01, G06G007/76, G06F007/70, G01S13/48, G01S13/931, B60R21/0134, G01S2013/9332, G01S2013/9367, G01S2013/9375, G01S2013/9385 | 08/918826 |
| 29 | 6011507 | Radar system and method of operating same | A method of operating a radar system, including the steps of digitally sampling a received signal at a predetermined sampling rate, to periodically provide a set of selected samples, the set of selected samples including positive going ramp samples, negative going ramp samples and CW burst samples and performing a first fast Fourier transform (FFT) on the positive going ramp samples, performing a second fast Fourier transform on the negative going ramp samples and performing a third fast Fourier transform on the CW burst samples is described. Utilizing the subsequent radar operations the method further includes the steps of tracking each resulting signal from the first fast Fourier transform performing steps, tracking each resulting signal from the second fast Fourier transform performing steps and tracking each resulting signal from the third fast Fourier transform performing steps and associating any resulting signals from the tracking steps to periodically provide output signals indicative of other vehicles | Curran Anthony (Brookline, MA), Potts Steven L. (Andover, MA), Crain Arthur (Framingham, MA) | Raytheon Company (Lexington, MA) | 12.11.1996 | 04.01.2000 | G01S13/00, G01S13/48, G01S13/34, G01S13/72, G01S13/42, G01S13/93, G01S7/02, G01S7/35, G01S7/285, G01S013/72, G01S7/352, G01S13/34, G01S13/42, G01S13/48, G01S13/726, G01S13/931, G01S13/345, G01S2013/9321, G01S2013/9325 | 08/745530 |
| 30 | 5966092 | Radar system, in particular motor vehicle radar system | In a radar system, which is used particularly in motor vehicles, the angle at which a detected radar target is located are determined by providing that echo signals of the radar target are picked up via at least two reception channels, and their amplitudes are standardized and compared with standardized values, stored in memory, of a duplex antenna graph of the radar system | Wagner Klaus-Peter (Stuttgart, DE), Winter Klaus (Schwieberdingen, DE), Pfizenmaier Heinz (Leonberg, DE) | Robert Bosch GmbH (Stuttgart, DE) | 07.07.1997 | 12.10.1999 | G01S13/42, G01S13/48, G01S13/00, G01S013/93, G01S013/48, G01S13/424, G01S13/4445, G01S13/4454, G01S13/931 | 08/875584 |
| 31 | 5955991 | Radar apparatus | An object is to provide a cheap digital beamforming radar apparatus. For achieving it, the radar apparatus of the present invention comprises a transmit section for radiating a transmit signal in the form of an electromagnetic wave, an array antenna comprised of a plurality of antenna elements for receiving an electromagnetic wave re-radiated from an object when the electromagnetic wave of the transmit signal reaches the object, as a receive signal, a switching device for connecting either one of the antenna elements to a predetermined terminal in an alternative way by a switching signal, a receive section for downconverting the receive signal obtained from the predetermined terminal by use of part of the transmit signal to generate a difference signal between the transmit signal and the receive signal and converting this difference signal to a digital signal, and a digital signal processing section for subjecting the digital signal from the receive section to a predetermined process to detect a distance to the object or a relative velocity of the object | Kawakubo Atsushi (Susono, JP) | Toyota Jidosha Kabushiki Kaisha (JP) | 22.10.1998 | 21.09.1999 | G01S13/42, G01S13/34, G01S13/00, H01Q3/26, H01Q3/24, G01S13/87, G01S13/02, G01S13/93, G01S13/48, G01S7/02, H01Q003/02, H01Q003/12, G01S13/345, G01S13/426, H01Q3/24, H01Q3/26, G01S13/48, G01S13/87, G01S13/931, G01S2013/0245 | 09/177105 |
| 32 | 5949365 | Multiple-beam radar system | A multiple-beam radar system, in particular for motor vehicle applications. More transmission elements than reception elements are present. The transmission elements present can be activated both individually and also in any desired simultaneous combination. An observable angular region can thereby be widened, in economical fashion, as compared with known radar systems | Wagner Klaus-Peter (Stuttgart, DE) | Robert Bosch GmbH (Stuttgart, DE) | 06.04.1998 | 07.09.1999 | G01S13/87, G01S13/93, G01S13/48, G01S13/00, G01S013/93, G01S13/48, G01S13/87, G01S13/931, G01S13/003 | 09/055788 |
| 33 | 5945939 | Multibeam FM radar system | A multibeam FM radar system has an FM radar module for transmitting beams of FM signals whose frequencies linearly vary in rising and falling periods, in respective different directions with adjacent ones of the beams overlapping each other, receiving echo signals from a given beam, and mixing the FM signals and the echo signals into beat signals corresponding to said given beam. The multibeam FM radar system also has a main radar circuit including a central processing unit for identifying pairs of beat frequencies in the beat signals corresponding to said given beam, and processing the pairs of the frequencies to calculate distances up to and/or relative speeds with respect to objects within said given beam which have produced the echo signals, while comparing the frequencies within said identified pairs of beat frequencies to beat frequencies within a beam adjacent to said given beam to produce a detected result corresponding to an object producing echo signals within said given beam | Iihoshi Akira (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 06.05.1997 | 31.08.1999 | G01S13/48, G01S13/34, G01S13/00, G01S13/42, G01S7/285, G01S13/58, G01S13/87, G01S13/93, G01S7/288, G01S7/35, G01S7/02, G01S013/536, G01S013/93, G01S13/34, G01S13/48, G01S7/35, G01S13/345, G01S13/42, G01S13/584, G01S13/87, G01S13/931, G01S2007/2883 | 08/852155 |
| 34 | 5933109 | Multibeam radar system | A multibeam radar system includes a multibeam radar module having n (n is a natural number of at least 3) transmitting/receiving channels for transmitting high-frequency signals and receiving echo signals, and a radar circuit for detecting a distance up to an object which produces the echo signals and/or a relative speed of the object from a relationship between the high-frequency signals and the echo signals in the transmitting/receiving channels. The radar circuit includes a channel controller for selecting sets of m (m is a natural number smaller than n) adjacent transmitting/receiving channels sequentially to transmit the high-frequency signals and receive the echo signals in a high-azimuth-resolution mode. The channel controller may also select the transmitting/receiving channels sequentially one by one to transmit the high-frequency signals and receive the echo signals in a low-azimuth-resolution mode | Tohya Ken-i-chi (Wako, JP), Urabe Masanobu (Wako, JP) | Honda Giken Kabushiki Kaisha (Tokyo, JP) | 24.04.1997 | 03.08.1999 | G01S7/03, G01S13/93, G01S13/48, G01S13/34, G01S13/00, H01Q25/00, H01Q21/06, H01Q1/32, H01Q1/38, G01S13/02, G01S007/28, G01S7/023, G01S7/032, G01S13/34, G01S13/48, G01S13/931, H01Q1/3233, H01Q1/38, H01Q21/065, H01Q25/00, G01S2013/0263 | 08/847453 |
| 35 | 5731779 | Detection range adjusting system of obstacle detection apparatus for vehicle | A detection range adjusting system of an obstacle detection apparatus for a vehicle having a transmitting-receiving unit mounted on the vehicle for transmitting a detection signal directed over a predetermined range and receiving a reflection signal of the detection signal is provided. This system comprises a detection range setting means for processing the reflection signal and setting a detection range for detecting an obstacle which is included within the predetermined range and narrower than the predetermined range, a standard reflecting body positioned at a predetermined position relative to the vehicle, a standard position storing means for storing a standard position of the standard reflection body in the detection range beforehand, and an adjustment instructing means for instructing transmission of a detection signal for adjustment of the detection range. Setting of the detection range setting means is changed so that a detected position of the standard reflecting body in the detection range detected based on a reflection signal of the detection signal transmitted according to the instruction of the adjustment instructing means coincides with the standard position stored in the standard position storing means | Kikuchi Hayato (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 17.12.1996 | 24.03.1998 | G01S13/00, G01S7/22, G01S13/93, G01S13/42, G01S7/04, G01S13/48, G01S7/40, G01S013/93, G01S7/22, G01S13/42, G01S13/931, G01S7/4008, G01S7/4021, G01S13/48 | 08/767839 |
| 36 | 5614910 | Miss distance vector scoring system | A miss distance scoring system comprising four antennas which are configu to provide for an optimal radiation pattern of pulsed radio frequency energy to determine a missile's miss distance and miss direction from a target. Reflected pulses from a missile are received by each of the four antennas and then supplied by a radio frequency switch to a scalar scoring system which provides an analog video signal to four analog switches. The four analog switches are also connected to a controller which provides control signals to the switches to separately activate each switch. The activated analog switch then samples and holds the analog video signal with the sample being provided to an associated bandpass filter of the switch which is one of four bandpass filters. The sampled portions of the analog video signal are provided to a multiplexer and then passed sequentially through the multiplexer. The resulting doppler video signal is supplied to an analog to digital converter which converts this signal to an equivalent doppler digital signal. The equivalent doppler digital signal is next supplied to a pulse code modulation encoder which encodes the signal into a serial bit stream and provides a frame sync to the serial bit stream for transmission to a ground station by a transmitter and its associated antenna | Bradley Joseph L. (Oxnard, CA), Whiteman Don (Ridgecrest, CA), Mills George T. (Ridgecrest, CA) | The United States of America as represented by the Secretary of the Navy (Washington, DC) | 28.07.1995 | 25.03.1997 | F41J5/12, G01S13/00, G01S13/50, F41J5/00, G01S13/48, G01S7/285, G01S013/48, F41J5/12, G01S13/505, G01S7/285, G01S13/48 | 08/505716 |
| 37 | 5608407 | Bistatic angle-cued radar system and processing method | A radar system and method employing a radar with an electronically scanned antenna array for estimating range and range rate to a target using angle cueing only. The radar transmits radar pulses at the target and searches the projection of the line-of-sight to the target on the ground for ground-bounce returns associated with each transmitted pulse. A processor coupled to the radar and processes the ground-bounce returns to determine an angle corresponding to the maximum reflected multipath ground-bounce return when the antenna array scans the ground. The angle data derived from processing the multipath ground-bounce returns permits computation of the range to and range rate of the target | Jain Atul (Los Angeles, CA), Crosby James K. (Los Angeles, CA) | Hughes Electronics (Los Angeles, CA) | 17.04.1995 | 04.03.1997 | G01S13/00, G01S13/48, G01S013/46, G01S13/003, G01S13/48 | 08/423076 |
| 38 | 5594447 | Moving target identifying system in a base station radar unit for specifying information about moving targets carrying a mobile station radar unit | A vehicle ID radar system has a simple construction and obtains high identifying performance by making a general identification based on a plurality of responses. There are provided an antenna for obtaining a plurality of question signals from a base station radar unit, a receiver for processing the signals received from the antenna, a question code demodulator for demodulating question codes from the received signals, a question code decoder for decoding the question codes and reading responses respectively corresponding to the plurality of questions from a plurality of data bases, a response code generator for generating response signals, and a transmitter for modulating the response signals and supplying them to the antenna | Usui Ryuzaburo (Kanagawa, JP), Iwamoto Masafumi (Kanagawa, JP), Yamamoto Kazuhiko (Kanagawa, JP), Fujisaka Takahiko (Kanagawa, JP), Kondo Michimasa (Kanagawa, JP) | Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) | 01.06.1995 | 14.01.1997 | G01S13/76, G01S13/00, G01S13/91, G01S13/92, G07B15/00, G01S13/86, G01S7/02, G01S13/78, G01S13/93, G01S13/48, G01S13/42, G01S7/288, G01S7/41, G01S7/285, G01S013/76, G01S13/765, G01S13/91, G01S13/92, G07B15/063, G01S7/412, G01S13/42, G01S13/48, G01S13/78, G01S13/86, G01S13/931, G01S2007/2883, G01S2013/936 | 08/457614 |
| 39 | 5579010 | Multibeam radar system | A multibeam radar system. A matrix or inverse matrix indicating the characteristics of beams of ultrasonic waves or radio waves are previously created for each individual scanning direction (channel) and stored in a memory. Physical quantities corresponding to the intensities of echo signals and to the distance to an object are detected, and temporarily stored in another memory together with the corresponding scanning directions. Those of the temporarily stored data items which represent physical quantities corresponding to the same distance are arranged in rows or columns corresponding to the scanning directions. Inverse calculation processing, or deconvolution processing, is performed according to the matrix or inverse matrix indicating the beam characteristics. In this way, the reception level is corrected | Iihoshi Akira (Wako, JP), Tohya Ken-ichi (Wako, JP) | Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP) | 24.05.1995 | 26.11.1996 | G01S13/00, G01S13/48, G01S7/295, G01S13/93, G01S7/02, G01S15/42, G01S13/34, G01S13/87, G01S15/00, G01S7/523, G01S7/41, G01S7/526, G01S013/60, G01S013/94, G01S7/295, G01S13/48, G01S7/412, G01S7/526, G01S13/34, G01S13/87, G01S15/42, G01S2013/9321, G01S2013/9346 | 08/449822 |
| 40 | 5534870 | Anticollision device, notably for motor vehicles | In an anticollision device, a moving object heading in a given direction along a movement vector and having a relative speed vector directed towards an obstacle is fitted out with at least two antennas sending out a microwave signal liable to be received by the obstacle. The device furthermore comprises reception means and means to analyze the echoes received from the obstacle, the analyzing means determining the variation with respect to time of the angle .theta. between the movement vector and the relative speed vector, a substantially zero variation of the angle .theta. indicating a risk of collision. Application to the equipment of motor vehicles to prevent collisions, notably in the event of poor visibility | Avignon Bruno (Palaiseau, FR), Barre Charles (Epinay-sur-Orge, FR), Canal Yves (Antony, FR) | Thomson - CSF (Paris, FR) | 14.12.1994 | 09.07.1996 | G01S13/00, G01S13/93, G01S13/48, G08G001/16, G01S13/931, G01S13/48, G01S2013/9375 | 08/355550 |
| 41 | 5461389 | Digital beamforming array | A digital beamforming array for use in radar applications and particularly in radar applications that used phased array technology. The array receives an incoming signal at a plurality of sensor modules, converts them to intermediate frequency, and then converts the intermediate frequency signals to n-bit (preferably 1-bit) digital signals at an oversampling rate, where n is less than the number of bits required to represent the dynamic range of the intermediate frequency signal. The n-bit digital signals are then beamformed by altering their relative phases and combining them to form a resultant n-bit digital signal which is then converted to a digital signal of the number of bits required to represent the dynamic range of the intermediate frequency signal. An advantage of the present invention is that it reduces the complexity and thus the cost of the digitizing hardware required | Dean Michael (Malvern, GB) | The Secretary of State for Defence in Her Britannic Majesty's Government (London, GB2) | 30.06.1994 | 24.10.1995 | G01S13/48, G01S13/87, G01S13/00, H01Q3/26, H01Q003/22, G01S13/48, G01S13/87, H01Q3/26 | 08/244889 |
| 42 | 5087917 | Radar system | A radar system having a phased array antenna for transmission and a digital beam forming antenna for reception for observing a plurality of targets by transmitting transmission pulses to the respective targets comprises a subtraction control circuit, a transmission timing control circuit and a transmission beam direction control circuit. The substraction control circuit calculates a required number of transmission pulses (beams) to be transmitted for each of transmission cycles in accordance with detected Doppler frequencies of the targets, so as not to cause ambiguity on the detected Doppler frequencies, and determines a beam direction for each of transmission beams. The timing control circuit and beam direction control circuit control transmission timing and direction of the beams | Fujisaka Takahiko (Kanagawa, JP), Kirimoto Tetsuo (Kanagawa, JP), Oh-hashi Yoshimasa (Kanagawa, JP), Kondo Michimasa (Kanagawa, JP) | Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) | 18.09.1990 | 11.02.1992 | G01S13/48, G01S13/00, H01Q3/30, H01Q3/38, H01Q3/26, G01S013/00, G01S13/48, H01Q3/26, H01Q3/385 | 07/584157 |
| 43 | 4996532 | Digital beam forming radar system | A radar system having improved interference resistance. A transmitting section includes an oscillator capable of switching the oscillation frequency, and a transmitting antenna connected to said oscillator and capable of transmitting electric waves having specified transmitting enable a desired range to be scanned. The oscillator and the transmitting antenna are designed to operate so that every time one scanning is completed or every time the transmitting direction is changed during each scanning period, the transmitting frequency may be changed. The receiver can simultaneously form a plurality of beams in the scanning range, convert the received signals to digital signals, and output signals indicating the frequencies and arrival directions of the received signals. The operating mode of the transmitting section may be altered in accordance with the frequency and arrival direction of the received waves | Kirimoto Tetsuo (Kanagawa, JP), Fujisaka Takahiko (Kanagawa, JP), Ohashi Yoshimasa (Kanagawa, JP) | Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) | 13.12.1989 | 26.02.1991 | G01S13/24, G01S13/00, G01S7/36, G01S13/48, G01S007/36, G01S007/42, G01S7/36, G01S13/24, G01S13/48 | 07/450290 |
| 44 | 4992796 | Computed-interferometry radar system with coherent integration | In a radio-frequency radar system, a radar antenna (12) irradiates a region to be monitored, and antenna elements (14a-p) arrayed irregularly about a mobile platform (10) receive the resultant echo signal, which mixers (18 and 21) translate in frequency, coherently with the transmitted signal, to a lower frequency, at which a sample-and-hold circuit (24) can sample it. A beam-forming operation is performed on the sample signals by employing coefficients that have been computed from calibration readings taken by the elements mounted on the platform. The beam signals resulting from numerous successive transmitted pulses are then integrated coherently to produce an output | Apostolos John T. (Merrimack, NH) | Lockheed Sanders, Inc. (Nashua, NH) | 20.02.1990 | 12.02.1991 | G01S13/00, G01S7/40, G01S13/48, G01S13/02, G01S013/48, G01S7/4004, G01S13/48, G01S2013/0227 | 07/482164 |
| 45 | 4951059 | Dual stacked beam radar | A dual stacked beam radar in which, after listening to low stack beams, and waiting for their echoes to return, a transmitter signal is transmitted on high, the high stack beams being listened to during the longer dead times during variable interpulse periods of the low stack beams | Taylor, Jr. John W. (Baltimore, MD) | Westinghouse Electric Corp. (Pittsburgh, PA) | 02.11.1988 | 21.08.1990 | G01S13/00, G01S13/42, G01S13/48, G01S013/48, G01S13/424, G01S13/426, G01S13/48 | 07/266193 |
| 46 | 4947176 | Multiple-beam antenna system | A multiple-beam antenna system capable of forming a plurality of beams at one time in different directions. The antenna system has a plurality of element antennas arranged in a predetermined configuration. A signal received by each element antenna is converted to a digital signal which in turn is subjected to a Fourier transform. The Fourier-transformed receiving signal is multiplied with a Fourier-transformed weighting function. The resultant product is subjected to an inverse Fourier transform to be used for calculating an antenna radiation pattern. A holographic multiple-beam antenna is also disclosed | Inatsune Shigeho (Kanagawa, JP), Ohashi Yoshimasa (Kanagawa, JP), Fujisaka Takahiko (Kanagawa, JP), Kondo Michimasa (Kanagawa, JP) | Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) | 08.06.1989 | 07.08.1990 | G01S13/00, G01S3/74, G01S3/02, G01S13/48, H01Q21/00, H01Q25/00, G01S013/00, G01S3/74, G01S13/48, H01Q21/0025, H01Q25/00 | 07/363490 |
| 47 | 4924235 | Holographic radar | In a holographic radar having receivers (10) for amplifying, detecting, and A/D-converting the RF signals in all range bins received by antenna elements (1) and a digital beamformer (11) for performing digital operations on the outputs of these receivers to generate a number of beams equal to the number of antenna elements, three or four antenna arrays (D0 to D3), each array (2) being formed of a plurality of antenna elements (1), are oriented in different directions to provide 360.degree. coverage and switches (12) are provided to switch the connection between the antenna elements (1) and the receivers (10) according to pulse hit numbers and range bin numbers. Thus high-speed 360.degree. scan coverage can be attained with a small, inexpensive apparatus requiring as many receivers, memory elements and a digital beam former as needed for a single antenna array. The number of receivers can be further reduced by assigning one receiver per group of K array elements, providing memory elements, in number corresponding to the number of antenna elements, and operating further switches in synchronization with the transmit pulses and storing the video signals in the respective memory elements | Fujisaka Takahiko (Yokohama, JP), Ohashi Yoshimasa (Fujisawa, JP), Kondo Mithimasa (Yokohama, JP) | Mitsubishi Denki Kabushiki Kaisha (Tokyo, JP) | 12.10.1988 | 08.05.1990 | G01S13/00, G01S13/89, G01S13/42, G01S13/48, H01Q3/24, H01Q3/26, H04B007/00, G01S13/42, G01S13/48, G01S13/89, H01Q3/24, H01Q3/26 | 07/290048 |
| 48 | 4649395 | Pulse radar apparatus | A pulse radar apparatus is provided with a coherent transmitting and receiving unit with N juxtaposed receiving antennas and N receivers for the reception of echo signals and the processing thereof into two orthogonally phase-detected and digitized video signal components i.sub.r and q.sub.r, where r=0, 1, 2, . . . , N-1. A beamformer is provided to derive from these components the orthogonal components I.sub.k and Q.sub.k of the video signal determined jointly by the N receivers in accordance with a receiving beam pattern k corresponding with a specific elevation interval, where l=0, 1, 2, . . . ,N-1. The orthogonal components I.sub.n, Q.sub.n and I.sub.n+1, Q.sub.n+1 supplied through two adjoining beamformer output channels n and n+1, and derived from the video signals P.sub.n, P.sub.n+1 from echo signals of maximum amplitude received from moving targets, are used for determining the deviation (.DELTA..alpha.) of the elevation value .alpha., which elevation value corresponds with the center between the receiving beam patterns n and n+1 | Gellekink Bernard (Ootmarsum, NL), Hol Willem A. (Hengelo, NL) | Hollandse Signaalapparaten B.V. (Hengelo, NL) | 18.04.1984 | 10.03.1987 | G01S13/00, G01S13/42, G01S13/48, G01S013/48, G01S13/42, G01S13/48 | 06/601524 |
| 49 | 4649389 | Stacked beam radar and target height measurement extractor especially for use therein | A radar having a multiplicity of receive beams stacked in elevation and a target height extractor especially for use therein are disclosed. In operation, a set of range sweeps corresponding to an azimuth scan of the stacked receive beams across a detected target is established. A range cell interval corresponding to the detected target is estimated for each range sweep of the set. A target range measurement is computed from a set of estimated range intervals. Only the radar receive beam echo information corresponding to the estimated range cell interval for each range sweep of the established set is used by the height extractor to compute a corresponding set of elevation angles. A target elevation angle is formed as the weighted average of this computed set. Only one height computation is performed for each established set of range sweeps based on a function of factors including the computed target elevation angle and computed range measurement of the corresponding established set of range sweeps | Taylor, Jr. John W. (Baltimore, MD), Hodges Michael J. (Linthicum, MD) | Westinghouse Electric Corp. (Pittsburgh, PA) | 27.03.1984 | 10.03.1987 | G01S13/00, G01S13/42, G01S13/48, G01S013/48, G01S13/424, G01S13/48 | 06/593784 |
| 50 | 4538152 | Surveillance radar system which is protected from anti-radar missiles | A surveillance radar system comprising an omni-directional transmitter and a number of radar receivers located at different geographic locations from the transmitter which are capable of resolving the angular location of targets by using antenna lobe multiples over the range to be monitored so that anti-range missiles cannot destroy the receivers since their locations will be unknown. The transmitter transmits on a continuous basis rather than on pulsed basis to reduce the probability of location by anti-radar missiles | Wirth Wulf D. (Rheinbach, DE) | Siemens Aktiengesellschaft (Berlin & Munich, DE) | 18.01.1980 | 27.08.1985 | G01S13/536, G01S13/32, G01S13/00, G01S7/35, G01S7/02, G01S13/48, G01S013/00, G01S007/36, G01S7/35, G01S13/325, G01S13/48, G01S13/536 | 06/113175 |
| 51 | 4464662 | Determining azimuth of a transponder by measuring a plurality of phase shifts | A method for determining the azimuth .alpha. of a transponder relative to a radar system which transmits a frequency F varying linearly with time. The system comprises two receiving antennas disposed at a distance d from each other and produces two beat signals Fb.sub.1 and Fb.sub.2, formed by mixing the transmitted wave with each of the two echo waves received from the transponder. The phase shift .phi. between Fb.sub.1 and Fb.sub.2 at a first time t, and frequency f, and the phase shift .phi.'.sub.o at a second time t.sub.2 and frequency f.sub.2 is measured, and the overall phase shift .phi. between Fb.sub.1 and Fb.sub.2 is calculated. The value of .alpha. is calculated from the values F.sub.1, d and .phi. | Tomasi Jean-Pierre (Velizy, FR) | U.S. Philips Corporation (New York, NY) | 22.04.1981 | 07.08.1984 | G01S13/48, G01S13/00, G01S13/34, G01S003/46, G01S013/78, G01S13/343, G01S13/48 | 06/256744 |
| 52 | 4319243 | Airport-surveillance system | An airport-surveillance system for determining the position and identification of aircraft (4) on the airfield which utilizes secondary radar and includes an interrogation station (1) installed on the airfield (3) and from which the interrogation signal is transmitted by way of a narrow sharply forcused beam of an antenna which scans the airfield and further includes transponding stations installed in the aircraft (4). The present invention provides accurate identification and location of the aircraft by utilizing a receiver which has a sharply focused antenna beam and which is geographically located a distance away from the interrogation antenna and wherein the replies from the transponder of the aircraft are received by the receiving antenna only when the interrogation and receiving antenna beams (2, 22) intersect. By scanning all locations of the airport, the position and identification of all aircraft on the airport can be determined. A modification of the invention provides that instead of or in addition to the receiving station having a narrow beam antenna a number of receivers (5, 6 and 7) having omni-directional receiving antennas can be mounted at different locations on the airfield for determining the aircraft positions by using hyperbola locating techniques. The airport surveillance system of the invention is particularly suitable for large airports | Vachenauer Erwin (Haar, DE), Wagner Gerhard (Waakrichen, DE), Mueller Bernd (Poecking, DE) | Siemens Aktiengesellschaft (Berlin & Munich, DE) | 08.02.1980 | 09.03.1982 | G01S13/78, G01S13/00, G01S13/48, G01S13/87, G01S13/91, G01S13/93, G01S013/78, G01S13/003, G01S13/48, G01S13/78, G01S13/878, G01S13/91, G01S2013/9335 | 06/119792 |
| 53 | 4163974 | Antenna feed system | Eight radiators, disposed along a line, are coupled to a radar via a Butler matrix. In response to a transmitted signal from the radar, inverse transform signals that have amplitudes representative of values of a sinusoid in an angular range of zero radians to .pi. radians is applied to the Butler matrix. The inverse transform signals cause excitation to be applied to two of the radiators that are adjacent to each other. The inverse transform of the sinusoid at the output of the Butler matrix, in addition to allowing the excitation of two adjacent pairs of radiators, also provides a transmitted beam having reduced beamwidth and lower sidelobes. The two adjacent radiators are selected by selecting a phase pattern of the inverse transform signals | Profera Charles E. (Cherry Hill, NJ) | RCA Corporation (New York, NY) | 14.10.1977 | 07.08.1979 | G01S13/48, G01S13/00, G01S13/44, H01Q3/40, H01Q3/30, H01Q3/24, G01S009/02, H04B007/06, H01Q003/24, G01S13/4409, G01S13/48, H01Q3/245, H01Q3/40 | 05/842079 |
| 54 | 4110754 | Detection of angular displacement to an object from the moving vehicle | A pair of first and second antennas is mounted at the front end of a roadway vehicle. A first sequence of recurring bursts of energy at two different frequencies is transmitted from the first antenna and a second sequence of similar bursts of energy is transmitted from the second antenna at alternate intervals with the bursts of energy transmitted from the first antenna. The signals transmitted from the first and second antennas are reflected from an object and received respectively by the first and second antennas and sampled at appropriate intervals to derive a first set of two Doppler signals from the signal received by the first antenna and a second set of two Doppler signals from the second antenna. The relative phase between the Doppler signals derived from the first antenna and the relative phase between those derived from the second antenna are detected by first and second phase detectors, respectively. The outputs from the phase detectors are subtracted from each other to utilize the difference therebetween as an input data to a microcomputer to determine the angular displacement of the object from the center axis of the vehicle | Endo Hiroshi (Yokosuka, JP) | Nissan Motor Company, Limited (Yokohama, JP) | 27.05.1977 | 29.08.1978 | G01S13/93, G01S13/00, G01S13/48, G01S13/34, G01S13/42, G01S009/02, G01S009/44, G01S13/931, G01S13/348, G01S13/42, G01S13/48 | 05/801315 |