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| Number | Title | Issue Date |
| 8274427 | Radar device A radar device including: a reception antenna that receives radio waves, includes at least three antennas and is arranged so that the phase center points thereof form an isosceles triangle; an arrival direction detection unit that detects an arrival direction of the... | 09/25/2012 |
| 7372897 | Portable information communication terminal, program, and recording medium The number of times for averaging operation for averaging a correlation value of a received signal and a reference signal is properly controlled. When the correlation value is not averaged, since a lower limit value TH_A of a correlation level of a distribution of t... | 05/13/2008 |
| 7352800 | Method of partial parallel interference cancellation A method of Partial Parallel Interference Cancellation (PPIC) is provided for recursively eliminating the Multiple Access Interference from a received signal. Such method is to use a recursion way to eliminate all the Multiple Access Interference (MAI) one by one fr... | 04/01/2008 |
| 7340277 | Adaptive antenna for controlling the weighting on a plurality of antenna elements An optical subscriber system according to the present invention has an adaptive antenna having a plurality of antenna elements, for controlling the weighting on the antenna elements thereby to radiate beams that are adapted to radio wave environments, a position est... | 03/04/2008 |
| 7324039 | Short-range automotive radar transceiver Automotive vehicle including a radar transceiver each including a heterodyne active IMPATT multiplier module arranged to receive a signal from a VCO, a first balance mixer arranged to receive a signal from a VCO, a second balance mixer arranged to receive a signal f... | 01/29/2008 |
| 7292179 | Instantaneous passive range finding A method and apparatus for use in determining the range in a single time sample from a platform to a target are disclosed. The method includes receiving radiation emanating from the target at two points on the platform in a common time sample; detecting the received... | 11/06/2007 |
| 7218684 | Method and system for code reuse and capacity enhancement using null steering The number of users and data capacity of wireless systems are increased by employing apparatus and method for increasing the number of spreading codes available in the system by providing a mechanism to reuse the already allocated spreading code or use the codes tha... | 05/15/2007 |
| 7212152 | Monopulse radar system The present invention provides that a monopulse radar system to correct an amplitude error and a phase error developed between receiving channels and improve the accuracy of a detected angle. A part of a transmit signal is supplied to respective channels on the rece... | 05/01/2007 |
| 7180459 | Multiple phase center feedhorn for reflector antenna A feedhorn driving method and apparatus allows the establishment of multiple phase centers using only a single multimode feedhorn. At least two higher-order modes are extracted from the feedhorn and weighted in amplitude and phase. The phase center separation is est... | 02/20/2007 |
| 7151498 | System and method for preferentially controlling grating lobes of direct radiating arrays A DRA with preferentially controlled grading lobes is described. The DRA comprises a plurality of elements, collectively defining a main lobe nearest the DRA boresight and a set of grating lobes near the main lobe, wherein each of the grating lobes in the set of gra... | 12/19/2006 |
| 7098599 | Plasma generator The whole antenna conductor is housed in the interior of a vacuum container of a plasma generator thereby to eliminate the need for an insulating partition or a top plate so that the whole induction field radiated from the antenna can be effectively utilized. Furthe... | 08/29/2006 |
| 7038620 | Warped plane phased array monopulse radar antenna A phased array, phase-amplitude monopulse antenna arrangement for ground, shipboard or airborne radar systems. The phased array antenna is systematically warped and projects partially overlapping, separate beams from upper and lower regions of the array. A single se... | 05/02/2006 |
| 7035651 | Process and devices for determining the radio reception direction in a mobile communications network A process is proposed for determining the radio reception direction on the downlink at a radio base station location, comprising a plurality of radio coverage areas, in a mobile communications network, in which in each area on the downlink radio signals are radiated... | 04/25/2006 |
| 6954176 | Device and method for an antenna array with switchable wide-angle coverage In order in simple manner to switchably cover a wide angle in sectors using an antenna array with broad main lobe, an antenna elements are so arranged, that the elements can be individually selected, so that some elements of the array can be operated in-phase and ot... | 10/11/2005 |
| 6741205 | Monopulse radar system A monopulse radar system aims to correct an amplitude error and a phase error developed between receiving channels and improve the accuracy of a detected angle. To achieve the above aim, part of a transmit signal is supplied to respective channels on the receiving s... | 05/25/2004 |
| 6717543 | Radar device for object self-protection In regard to radar guidance of a launch container (15) for fragmentation projectiles (16) for defending against an attacking missile (12), from the object (11) to be protected, the present invention affords a radar guidance system which c... | 04/06/2004 |
| 6712140 | 3rd borehole radar antenna and algorithm, method and apparatus for subsurface surveys The invention relates to a borehole radar tool comprising, in a housing (2) a transmitting antenna and a receiving antenna both of which comprise, near the housing wall (2), a dipole antenna (8) and a reflector (10) opposite thereto. Also... | 03/30/2004 |
| 6603422 | Ground penetrating radar incorporating a real-time multi-target direction finding capability The Ground Penetrating Radar (GPR) system introduced in this application provides data from an underground medium of the same caliber as that provided by conventional radars in air or space applications. This includes direction as well as distance to all ... | 08/05/2003 |
| 6498582 | Radio frequency receiving circuit having a passive monopulse comparator A passive MMIC monopulse comparator includes a plurality of lumped element hybrids having pi and T filter structures. In one embodiment, a first hybrid receives first and second downcoverted signals and provides a first output signal to a third hybrid and... | 12/24/2002 |
| 6437740 | Single receiver wireless tracking system A wireless tracking system consists of a wireless target including a wireless communication system for transmitting a data packet over a communication path, and a locating station for determining a position of the target. The data packet transmitted from ... | 08/20/2002 |
| 6316934 | System for three dimensional positioning and tracking A system for monitoring of the position of at least one portion of an object. The system includes a plurality of transmitters operative to transmit alternating magnetic fields within a three-dimensional space, and at least one positioning sensor arranged ... | 11/13/2001 |
| 6211813 | Compact monopulse source for a focal feed reflector antenna A monopulse source for a focal feed antenna including at least two waveguides machined in a metal flange supporting a microwave transmission and reception circuit of the antenna, and a dielectric substrate on the metal flange. Also included is a microwave... | 04/03/2001 |
| 6195035 | Cylindrical monopulse A monopulse antenna system comprising an inner antenna and an outer antenna disposed symmetrically about a central axis of symmetry. A central aperture is located at the axis of symmetry through which a weapon system may fire or an additional sensor may b... | 02/27/2001 |
| 6150975 | Divergence measurement antenna for single-pulse radar A divergence measurement antenna for single-pulse radars comprises at least two radiant panels. With their beams having the same center of phase, they are oriented differently. A monotonic function of the angular divergence of a signal received by the ant... | 11/21/2000 |
| 6100841 | Radio frequency receiving circuit A compact RF monopulse receiver circuit having a relatively low noise figure which is particularly useful for operation in the millimeter wave frequency range is described. The compact monopulse receiver finds use in small projectile and small missile app... | 08/08/2000 |
| 5991474 | Obstacle sensor operating by collimation and focusing of the emitted wave Millimetric wave device, capable of operating as a signal transceiving antenna, with an optimum image definition even at extremely short distances (about 1 mm). Depending on the more or less concentration of the waves, the so realised radar antenna adopts... | 11/23/1999 |
| 5914684 | Electromagnetic transducer system with integrated circuit card adapter An apparatus according to various aspects of the present invention is configured to collect and/or emit electromagnetic waves, particularly microwaves. In one embodiment, a transducer system includes an integrated waveguide, transducer, and processing cir... | 06/22/1999 |
| 5847675 | Radar with a wide instantaneous angular field and a high instantaneous angular resolution in particular for a missile homing head This radar with a wide instantaneous angular field and a high instantaneous angular resolution, in particular for a missile homing head, includes essentially: a transmitting antenna with a relatively wide radiation pattern, transmitting a quasi-continuous... | 12/08/1998 |
| 5815112 | Planar array antenna and phase-comparison monopulse radar system A planar array antenna comprises a plurality of antenna elements disposed in a predetermined matrix pattern. Feeders extend from a feed to the antenna elements. High-frequency switches cooperatively open or close the feeders connected to antenna elements ... | 09/29/1998 |
| 5784022 | Process and amplitude or phase monopulse radar device for locating flying objects The process and the corresponding phase or amplitude-single pulse radar device are used to locate a first and possibly a second target (TT1, TT2) detected by the radar beam from the direction x1, y1; x2, y2. The extended single-pulse aerial of the radar d... | 07/21/1998 |
| 5754140 | Beam sharpened, low sidelobe antenna system A beam sharpened, low sidelobe antenna is obtained by segmenting the antenna to provide two sub-antennas, one of which is arranged as an interferometer. The output signals of the two antennas are added and subtracted to provide sum and difference signals.... | 05/19/1998 |
| 5731783 | Method and apparatus for estimating radar signal polarisation This invention relates to a method and apparatus by which a coarse estimate of radar signal polarisation can be obtained. An array comprises at least three differently directed detectors. The polarisation is estimated by measuring an amplitude relationshi... | 03/24/1998 |
| 5612702 | Dual-plane monopulse antenna A planar edge-slotted and end-fed traveling wave antenna is designed for monopulse operation, with an odd array of parallel elements interleaved with an even array of parallel elements. The even elements have an amplitude taper that is an arithmetic sum o... | 03/18/1997 |
| 5594448 | Highly accurate RF-ID positioning system A balanced receive antenna circuit configuration determines an accurate position of a transponder within the antenna field pattern of the reader antenna. The balanced receive antenna configuration consists of two antennas physically rotated 90 degrees rel... | 01/14/1997 |
| 5574461 | Radar apparatus for connecting to a gun A radar apparatus provided with a Cassegrain antenna to be mounted on the barrel of a gun. The Cassegrain antenna is of the polarization twist type with a flat adjustable mirror being used to generate a lead angle. In addition, gun-induced vibrations tran... | 11/12/1996 |
| 5493303 | Monopulse transceiver A dual channel monopulse transceiver is described for use at millimeter wavelengths and for the detection of targets for vehicle collision avoidance. A microstrip antenna is located on one side of a plate and a transceiver microstrip circuit coupled to th... | 02/20/1996 |
| 5459668 | Method and apparatus for signal analysis employing a virtual cross-correlation computer The invention includes an arrangement of actual sensors in an antenna array with a computation of higher-order statistics to provide virtual second order statistics corresponding to virtual elements in the array; employment of the actual and virtual eleme... | 10/17/1995 |
| 5329285 | Dually polarized monopulse feed using an orthogonal polarization coupler in a multimode waveguide A dually polarized monopulse feed system for processing radar signal information from a target so the target may be identified and tracked includes a symmetrical multimode input waveguide, a coupler for separating polarized modes of signal waves to identi... | 07/12/1994 |
| 5283588 | Monopulse tracking apparatus A monopulse tracking apparatus comprises first to fourth electromagnetic horns disposed symmetrically to each other in an azimuthal direction and elevation direction in a 2×2 matrix state, a first hybrid circuit for creating the sum signal and difference... | 02/01/1994 |
| 5274384 | Antenna beamformer An antenna beamformer is provided for coupling to a circular antenna aperture comprising a plurality of vertical beamformers and four horizontal beamformers coupled to the vertical beamformers so that each horizontal beamformer has the capability to form ... | 12/28/1993 |
