Including A Remote Energy Source Patents (Class 342/376)
  • Patent number: 10374321
    Abstract: An antenna device is provided. The antenna device includes a reflector having a profile of a parabolic shape in a first cross-section cut parallel to a first direction and a profile of a hyperbolic shape in a second cross-section, the second cross-section being cut perpendicular to the first direction and crossing the first cross-section at a right angle and a radiating structure having at least one phased antenna array adapted to illuminate at least part of the reflector and to scan a beam. The edges of the profile of the parabolic shape of the first cross-section are formed to be directed toward the radiating structure. The edges of the profile of the hyperbolic shape of the reflector are formed to be directed away from the radiating structure. The antenna device may be diversified depending on various embodiments.
    Type: Grant
    Filed: July 27, 2017
    Date of Patent: August 6, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Gennadiy Aleksandrovich Evtyushkin, Artem Yurievich Nikishov, Anton Sergeevich Lukyanov, Elena Aleksandrovna Shepeleva, Alexander Nikolaevich Khripkov
  • Patent number: 10283862
    Abstract: A sparse phase-mode feed network for an antenna array is described. The waveguide assembly includes a plurality of radiating element probes for coupling to respective radiating elements of the antenna array, and a plurality of phase-mode feed probes. A variable phase shifter is positioned in the waveguide assembly in an annular region between the radiating element probes and the phase-mode feed probes to cause additional progressive electrical phase shifts of the radiating elements of the antenna array from 0 to 2?K radians, the phase shift progressing for one complete physical angular cycle in the plane of the waveguide assembly. A beam forming network couples the phase-mode feed probes to a plurality of phase-mode feed ports corresponding to respective consecutive-order phase modes of the antenna array. When coupled to the antenna array, respective orders of the phase modes provided at the phase-mode feed ports are selectable in accordance with K.
    Type: Grant
    Filed: October 17, 2016
    Date of Patent: May 7, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Marek Klemes
  • Patent number: 10236945
    Abstract: A wireless telecommunications system that employs a distributed-antenna system is described in which different combinations of radio signals are assigned to antennas so as to facilitate locating a wireless terminal based on the identity and the relative signal strength of the radio signals it receives above a signal-strength threshold.
    Type: Grant
    Filed: June 30, 2018
    Date of Patent: March 19, 2019
    Assignee: Polaris Wireless, Inc.
    Inventor: Vittorio Degli-Esposti
  • Patent number: 10205655
    Abstract: Aspects of the subject disclosure may include, a system that can transmit first wireless signals associated with communication signals, where the first wireless signals are directed via beam steering by an antenna array towards a wireless receiver. The system can transmit second wireless signals associated with the communication signals, where the second wireless signals are directed via the beam steering by the antenna array towards a transmission medium. The second wireless signals can induce electromagnetic waves at a physical interface of the transmission medium where the electromagnetic waves are associated with the communication signals. Other embodiments are disclosed.
    Type: Grant
    Filed: December 8, 2016
    Date of Patent: February 12, 2019
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Farhad Barzegar, Paul Shala Henry, Robert Bennett, Irwin Gerszberg, Thomas M. Willis, III, Donald J. Barnickel, Shikik Johnson
  • Patent number: 10200881
    Abstract: A telecommunications system is provided that is controllably operable as a sectorized antenna system and as an omnidirectional antenna system without requiring hardware reconfiguration. The telecommunications system includes a phase correlation measurement unit that can be between a sectorized antenna sub-system and a remotely located RF source site. The phase correlation measurement unit can be coupled to the RF source site over at least one feed line. The phase correlation measurement unit can output signals for controlling a phase shifter at the RF source site for phase shifting downlink signals and for causing operation of the sectorized antenna sub-system as an omnidirectional antenna sub-system. In a sectorized operation mode, the phase correlation measurement unit and the phase shifter can be inactivated.
    Type: Grant
    Filed: June 30, 2017
    Date of Patent: February 5, 2019
    Assignee: Andrew Wireless Systems GmbH
    Inventors: Peter Schmid, Stefan Eisenwinter, Matthew Thomas Melester, Peter Gunzner, Michael Williamson
  • Patent number: 10148009
    Abstract: A method and apparatus for phase-mode feeding a circular antenna array for beamsteering is provided. A Butler Matrix having M antenna-side ports and M input/output ports is coupled to beamsteering circuitry. The coupled input/output ports may include a port corresponding to a phase-mode having an order magnitude greater than one. The coupled input/output ports may include ports of three different order magnitudes of phase-mode. The Butler Matrix is coupled to M inner ports of a radial waveguide, and the antenna elements are coupled to N outer ports of the waveguide, where N>M. Where M=4, the input/output ports correspond to a zeroth order phase-mode, plus and minus 1st order phase-modes, and a second order phase-mode. The zeroth order phase-mode may be used for beamsteering closer to the radial axis of the antenna array while the second order phase-mode may be used for beamsteering further from the radial axis.
    Type: Grant
    Filed: November 23, 2015
    Date of Patent: December 4, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Marek Klemes
  • Patent number: 10014913
    Abstract: A wireless telecommunications system that employs a distributed-antenna system is described in which different combinations of radio signals are assigned to antennas so as to facilitate locating a wireless terminal based on the identity and the relative signal strength of the radio signals it receives above a signal-strength threshold.
    Type: Grant
    Filed: July 24, 2017
    Date of Patent: July 3, 2018
    Assignee: Polaris Wireless, Inc.
    Inventor: Vittorio Degli-Esposti
  • Patent number: 9906268
    Abstract: Aspects of the subject disclosure may include, for example, receiving, by each of a plurality of receivers, one of a plurality of electromagnetic waves, each electromagnetic wave of the plurality of electromagnetic waves guided by a different one of a plurality of twin-lead transmission lines, each twin-lead transmission line sharing a wire, and each electromagnetic wave of the plurality of electromagnetic waves including a different one of a plurality of communication signals, and obtaining, by each of the plurality of receivers, one of the plurality of communication signals. Other embodiments are disclosed.
    Type: Grant
    Filed: August 1, 2017
    Date of Patent: February 27, 2018
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Robert Bennett, Paul Shala Henry, Farhad Barzegar, Irwin Gerszberg, Donald J. Barnickel, Thomas M. Willis, III
  • Patent number: 9832545
    Abstract: A distributed directional aperture (DDA) system provides the capability to receive and/or transmit signals, limiting that reception or transmission to a 3-dimensional beam. The DDA system includes sensing and/or emitting array subsystems which comprise sensors and/or emitters distributed across, within, or under the skin of an aircraft, ship, ground vehicle, or fixed installation. The sensors receive energy, convert the received signals to digital information, and transmit that information via a telemetry subsystem to a beamformer subsystem. The beamformer subsystem analyzes the received signals from the sensors and/or emitters in order to determine the signal content from a specific direction. The emitters transmit energy, converting signals received from the beamformer subsystem via the telemetry subsystem into energy emissions. Methods of providing the DDA system including subsystems thereof are also disclosed.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: November 28, 2017
    Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
    Inventors: Peter B. Houser, Suzanna J. LaMar, Bayne R. Bunce, Jinous Valizadeh
  • Patent number: 9423495
    Abstract: A ship-based over-the-horizon (OTH) radar system provides mobile, persistent, wide-area air and ship surveillance across large ocean expanses and in anti-access/area denial (A2AD) environments. A transmit ship may include a log-periodic antenna (LPA) array adapted for use on a ship and a receive ship may include a plurality of monopole or dipole whip antennas. The transmit/receive antenna is fronted by a ground screen, which can be sized taking into account the sea as a naturally reflective surface. The transmit/receive ship can include advanced software to compensate for ship movement and synthetic aperture radar (SAR) techniques can be employed to includes the effective size of the radar receiver aperture. A modular design, using standard commercial container ships and shipping containers, allows for rapid deployment/stowage of radar equipment. Related methods are also described.
    Type: Grant
    Filed: February 20, 2014
    Date of Patent: August 23, 2016
    Assignee: Raytheon Company
    Inventors: Kaichiang Chang, Drew S. Ganter, Michael Anderson
  • Patent number: 9413078
    Abstract: Various embodiments of a millimeter-wave wireless point-to-point or point-to-multipoint communication system which enables determining preferred directions of transmissions, and transmitting in such preferred directions without routing radio-frequency signals. The system comprises a millimeter-wave focusing element, multiple millimeter-wave antennas, and multiple radio-frequency-integrated circuits (“RFICs”). In various embodiments, preferred directions are determined, and millimeter-wave beams are transmitted in the preferred directions.
    Type: Grant
    Filed: June 16, 2013
    Date of Patent: August 9, 2016
    Assignee: Siklu Communication Ltd.
    Inventors: Yigal Leiba, Boris Maysel
  • Patent number: 9232407
    Abstract: A transmitter-side estimation of the complex channel influence between function variable value transmitters and function receivers is limited to the estimation of the magnitude of the channel influence, so that a pre-distortion of the symbols of the symbol sequences depends on an inverse of the magnitude of the channel influence, but is independent of a phase of the channel influence. Easing the channel estimation does not change the central tendency of the calculated function results transmitted over the multiple channel. Alternatively, on the side of the function receiver, a statistical quantity describing the multiple-access channel is determined. For this purpose, it is sufficient when the function variable value transmitters transmit constant power signals over the multiple-access channel in a channel estimation phase. Thus, the channel estimation effort is transferred to the function receiver and hence occurs less frequently, which again reduces the overall energy expenditure.
    Type: Grant
    Filed: July 6, 2012
    Date of Patent: January 5, 2016
    Assignee: Fraunhofer-Gesellschaft zur Foerderung der angewandten Forschung e.V.
    Inventors: Slawomir Stanczak, Mario Goldenbaum
  • Patent number: 8289199
    Abstract: An antenna array for use within a microwave imaging system to capture a microwave image of a target is selectively programmed to optimize one or more parameters of the microwave imaging system. The array includes a plurality of antenna elements, each capable of being programmable with a respective phase shift to direct a beam of microwave radiation toward the target such that the microwave radiation from each of the plurality of antenna elements arrives at the target substantially in-phase. To optimize a parameter of the microwave imaging system, the phase shifts of selective ones of the antenna elements are altered, while still maintaining the substantially in-phase microwave radiation at the target.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: October 16, 2012
    Assignee: Agilent Technologies, Inc.
    Inventors: Izhak Baharav, Robert C. Taber, Gregory S. Lee
  • Patent number: 8223080
    Abstract: A transmission and reception module according to one embodiment of the present invention includes an antenna, a transmission circuit, a wave detection circuit, a high-frequency switch, a small-signal high-frequency diode limiter circuit, and a first power amplifier. The antenna transmits a transmission wave, or receives a reception wave. The transmission circuit is connected to the antenna via a circulator and supplies the transmission wave to the antenna. The wave detection circuit is connected to the antenna via the circulator and branches the reception wave received by the antenna to generate a control signal based on one branched reception wave. The high-frequency switch is connected to the wave detection circuit and suppresses a power of the other branched reception wave when the control signal is input thereto.
    Type: Grant
    Filed: June 1, 2010
    Date of Patent: July 17, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Haruo Kojima
  • Patent number: 7969358
    Abstract: Systems and methods for operating a communications system. The methods involve computing one or more complex weights to be applied to transmit signals and receive signals by beamformers. The complex weights are based at least on configuration data for the communications system. The methods also involve applying a first plurality of weight corrections to the complex weights based on phasing errors occurring in a communication path inclusive of a control system and antenna elements. The methods further involve applying a second plurality of weight corrections to the complex weights based on phase differences at the antenna elements relative to a reference location for the receive signals.
    Type: Grant
    Filed: November 19, 2008
    Date of Patent: June 28, 2011
    Assignee: Harris Corporation
    Inventors: G. Patrick Martin, Kathleen Minear, John Roach, Allan V. Dianic, William C. Adams, Jr., Lynda Margaret Ralston
  • Patent number: 7898464
    Abstract: A radio frequency (RF) phased array transmitter system comprises a phased array for generating an RF signal. The phased array comprises conductive patches formed in an array, separation gaps, and active sources. Each of the separation gaps is formed between two adjacent ones of the conductive patches, and each of the active sources is formed across its associated one of the separation gaps. The system further comprises an optical source for generating an optical signal and an RF source for generating an RF signal. In addition, the system comprises an optical modulator coupled to the optical source and the RF source. The optical modulator receives an optical signal and an RF signal, and produces an RF modulated optical signal based on the received optical signal and the received RF signal.
    Type: Grant
    Filed: March 19, 2007
    Date of Patent: March 1, 2011
    Assignee: Lockheed Martin Corporation
    Inventors: William W. Anderson, William S. Barquist
  • Patent number: 7889129
    Abstract: A system for a satellite includes a core system and multiple nodes for generating an active phased array. Each node includes a transceiver for wirelessly receiving a transmit signal from the core system, for wirelessly transmitting the transmit signals to a target, for wirelessly receiving the receive signals from the target, and for wirelessly transmitting the receive signal back to the core system. The system also includes a subsystem for inhibiting signal interference between the transmit and receive signals. Each of the nodes may also include local power generation circuitry.
    Type: Grant
    Filed: June 9, 2006
    Date of Patent: February 15, 2011
    Assignee: MacDonald, Dettwiler and Associates Ltd.
    Inventors: Peter A. Fox, Kenneth V. James
  • Patent number: 7782255
    Abstract: A system and methods for radar and communications applications. In one embodiment the present system comprises a wireless, space-fed, phased array of antennas including a plurality of unit cells. A first one of the unit cells includes a first one of the antennas and a unit cell command interpreter configured to receive a command, determine whether the command is intended for the first unit cell, and relay the command to logic for enabling a phase shift controller of the first antenna. In one embodiment the present methods comprise the step of wirelessly beaming microwave power from a power and control beam transmit unit to illuminate a wireless, space-fed, phased array of antennas including a plurality of unit cells. The method further comprises the steps of beaming a command to the array and converting the microwave power into direct current within a first one of the unit cells. The first unit cell includes a first one of the antennas.
    Type: Grant
    Filed: October 23, 2007
    Date of Patent: August 24, 2010
    Assignee: The Boeing Company
    Inventor: Daniel J. Sego
  • Patent number: 7777670
    Abstract: An improved millimeter wave illumination system includes at least one primary source of millimeter wave radiation, a reflecting surface and a baffle comprising a plurality of exit apertures arranged such that at least some of the radiation from the source is reflected from the reflective surface before proceeding to the baffle, characterized in that means are incorporated for generating a plurality of radiation field states within a pre-determined time interval. The baffle, source and reflector are preferably packaged into a container with the exit apertures providing an illumination output. The generation of the plurality of radiation field states provides an illumination at the illuminator output that is less spatially variable when integrated over the pre-determined time interval.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: August 17, 2010
    Assignee: QinetiQ Limited
    Inventors: Peter R Coward, Neil A Salmon
  • Patent number: 7724179
    Abstract: A receiver, such as a miniaturized microwave-photonic coherent receiver (MMPR) is disclosed. The receiver includes an antenna to output an electrical RF signal received on a section of the antenna, a laser to produce an optical signal, a photonic modulator to receive the optical signal and the electrical RF signal and produce an EO-RF signal and to receive the optical signal and an electrical LO signal and produce an EO-LO signal, a signal combiner to provide a combined EO-RF and EO-LO signal and a photodiode to receive the combined signal and produce an IF signal. A method of detecting an object using the MMPR includes receiving an electrical RF signal corresponding to the object, outputting the electrical RF signal to a photonic modulator, modulating the electrical RF signal onto an optical carrier, demodulating the electrical RF signal to produce an IF signal and processing the IF signal.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: May 25, 2010
    Assignee: Lockheed Martin Corporation
    Inventors: Brett A. Williams, Mark A. Turner
  • Patent number: 7432856
    Abstract: A signal simulation device for testing and developing radio receivers adapted to orientate antenna beams to different radio transmitters and to simultaneously suppress interference signals, comprises an antenna array, a signal generator generating reproducible digital signals in the complex baseband, and a digital matrix processor combined and synchronized with the signal generator. The processor has input signals generated by the signal generator and has output signals that form received signals of the antenna array. The input signals of the matrix processor are phase shifted according to a direction of incidence and to relative positions of the elements within the antenna array of the radio receiver, and are combined and supplied to outputs of the matrix processor. Amplitude and phase shift are simulated by weighting of the input signals from the signal generator, the weighting coefficients being calculated on a control computer and input into the matrix processor via an interface.
    Type: Grant
    Filed: April 19, 2006
    Date of Patent: October 7, 2008
    Assignee: Deutsches Zentrum für Luft- und Raumfahrt e.V.
    Inventors: Achim Hornbostel, Arno Schroth, Andriy Konovaltsev, Alexander Steingass, Andreas Eckardt, Holger Venus
  • Patent number: 7358890
    Abstract: An illumination source of predominantly non-directional and incoherent millimeter-wave radiation for illuminating an area for passive millimeter-wave imaging comprises a container with at least a partly reflective internal surface and a plurality of exit apertures and a primary source of millimeter-wave radiation for emitting millimeter-wave radiation into the container. The primary source and the container are arranged so that a proportion of the millimeter-wave radiation emitted by the source undergoes reflection within the container before being emitted through the apertures, such that the different paths lengths are at least equal to the coherence length of the radiation. This is facilitated if the bandwidth of the radiation is preferably at least 1 GHz. The container may be a box in which a waveguide is used to couple radiation from the primary source into the box. Alternatively, the container may be formed from a mesh and the plurality of holes is provided by the holes in the mesh.
    Type: Grant
    Filed: May 1, 2003
    Date of Patent: April 15, 2008
    Assignee: Qinetiq Limited
    Inventors: Sean Price, Peter Russell Coward, Neil Anthony Salmon
  • Patent number: 7333055
    Abstract: An antenna array for use within a microwave imaging system includes a plurality of reflecting antenna elements, each capable of being programmed with respective phase-shifts in a first pattern to direct a first beam of microwave radiation towards a first target, and each being capable of being programmed with respective phase-shifts in a second pattern to direct a second beam of microwave radiation towards a second target. To capture a microwave image of an object, the antenna elements are programmed with respective phase-shifts in an interleaved pattern including a portion of the first pattern and a portion of the second pattern.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: February 19, 2008
    Assignee: Agilent Technologies, Inc.
    Inventors: Izhak Baharav, Robert C. Taber, Gregory S. Lee
  • Patent number: 7283085
    Abstract: A scanning panel for use in a microwave imaging system captures a microwave image of a target using two complementary arrays of antenna elements. Each of the antenna elements in a first array is capable of being programmed with a respective phase delay to direct a transmit beam of microwave illumination toward the target in a transmit beam pattern, and each of the antenna elements in a second array is capable of receiving reflected microwave illumination reflected from the target in a receive beam in a receive beam pattern complementary to the transmit beam pattern. The microwave image of the target is formed at an intersection between the transmit beam and the receive beam.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: October 16, 2007
    Assignee: Agilent Technologies, Inc.
    Inventors: Gregory Steven Lee, Robert C. Taber, Izhak Baharav
  • Patent number: 6873301
    Abstract: An antenna system, to enable communication with a moving vehicle via a satellite, utilizes an array of subarrays contiguously positioned in a diamond-type pattern. Straight edge boundaries of an array can maximize sidelobe degradation resulting from diffraction effects at the edge. The diamond-type array pattern provides saw tooth array edge boundaries with all edge portions at 45 degrees (or other suitable acute angle) to the principal array dimension (the length dimension). Uniform excitation may be provided for all subarrays via a binomial power divider/combiner configuration. Mechanical beam steering can be provided in azimuth and elevation. A phase shifter assembly may be provided to enable a limited electronic scan (e.g., plus or minus 2 degrees) to increase beam steering agility from a moving vehicle. Thin flat-plate subarray design details are provided.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: March 29, 2005
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: Alfred R. Lopez
  • Patent number: 6822615
    Abstract: A microelectromechanical system (MEMS) steerable electronically scanned lens array (ESA) antenna and method of frequency scanning are disclosed. The MEMS ESA antenna includes a wide band feedthrough lens and a continuous transverse stub (CTS) feed array. The wide band feedthrough lens includes first and second arrays of wide band radiating elements and an array of MEMS phase shifter modules disposed between the first and second arrays of radiating elements. The continuous transverse stub (CTS) feed array is disposed adjacent the first array of radiating elements for providing a planar wave front in the near field. The MEMS phase shifter modules steer a beam radiated from the CTS feed array in two dimensions.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: November 23, 2004
    Assignee: Raytheon Company
    Inventors: Clifton Quan, Jar J. Lee, Brian M. Pierce, Robert C. Allison
  • Patent number: 6677899
    Abstract: A microelectromechanical system (MEMS) steerable electronically scanned lens array (ESA) antenna and method of frequency scanning are disclosed. The MEMS ESA antenna includes a MEMS E-plane steerable lens array and a MEMS H-plane steerable linear array. The MEMS E-plane steerable lens array includes first and second arrays of wide band radiating elements, and an array of MEMS E-plane phase shifter modules disposed between the first and second arrays of radiating elements. The MEMS H-plane steerable linear array includes a continuous transverse stub (CTS) feed array and an array of MEMS H-plane phase shifter modules at an input of the CTS feed array. The MEMS H-plane steerable linear array is disposed adjacent the first array of radiating elements of the MEMS E-plane steerable lens array for providing a planar wave front in the near field.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: January 13, 2004
    Assignee: Raytheon Company
    Inventors: Jar J. Lee, Clifton Quan, Brian M. Pierce
  • Publication number: 20020105464
    Abstract: A system and method for beamforming signals received in sparse, irregular sensor arrays has a network of sensors organized into sensor clusters, a signal processing node for each sensor cluster for beamforming the signals received by the sensors in each sensor cluster and an aggregation node for combining the beamformed responses from each sensor cluster to form a composite response characterized by minimized side lobes and grating lobes.
    Type: Application
    Filed: February 2, 2001
    Publication date: August 8, 2002
    Inventor: James E. Bevington
  • Patent number: 6198433
    Abstract: A multiple-beam electronic scanning antenna including an array of phase-shifters (2, Dij). The N simultaneous beams are obtained in N directions by a law of excitation (fij) applied to each computed phase-shifter (Dij) by summing the phase laws &psgr;1, &psgr;2, . . . &psgr;k, . . . &psgr;N associated respectively with each 1, 2, . . . k, . . . N order direction and by applying the resultant phase-shift (&psgr;tij) to the phase-shifter, without applying the resultant amplitude modulation (&rgr;ij). The multiple-beam electronic scanning antenna especially is applicable to uniquely phase-controlled antennas in satellite or terrestrial communications requiring simultaneous communications with several variable sites.
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: March 6, 2001
    Assignee: Thomson-CSF
    Inventors: Joël Herault, Michel Soiron, Gérard Garnier
  • Patent number: 5959578
    Abstract: A switch (10) having a beam-forming network (12) generates independently steerable beams (26). One or more of the independently steerable beams couple in radiating communication with selected ones of M beam ports (18). A feeder array (11) or second beam-former (13) provides signals to radiating elements 19 to form multiple antenna beams for communication.
    Type: Grant
    Filed: January 9, 1998
    Date of Patent: September 28, 1999
    Assignee: Motorola, Inc.
    Inventor: Randall William Kreutel, Jr.
  • Patent number: 5945946
    Abstract: A scanning array antenna (300) produces a directional beam by differentially rotating two, co-axial, flat phasing plate assemblies (302, 304). Each plate (302, 304) consists of a phase shifting means designed to efficiently pass incident radio frequency (RF) energy while imparting a particular phase shift to the energy. The energy can be supplied by a feedhorn (406) located behind the plates (402, 404) or can be introduced above the plates (508) and reflected by a ground plane (506) on the bottom plate (504). A method for producing the directional beam using the scanning array antenna (300) determines (804) the desired beam direction, calculates (806) the appropriate plate rotation angles (326, 328), and rotates (808) the plates (302, 304) at the appropriate time.
    Type: Grant
    Filed: October 3, 1997
    Date of Patent: August 31, 1999
    Assignee: Motorola, Inc.
    Inventor: Archer David Munger
  • Patent number: 5797083
    Abstract: A method and device for aligning a satellite receiver antenna with a broadcast satellite is disclosed herein. The device includes a receiver for measuring a signal strength from the satellite and issuing commands based on the measurement, a receiver antenna capable of automatically changing its alignment, and a rough alignment indicator located remotely from the receiver for signalling when the antenna is pointed sufficiently toward the satellite allow the receiver to maximize the signal strength by aligning the antenna with the satellite via commands from the receiver. The method includes placing the receiver antenna on a stable surface, manually pointing the antenna in the direction of the satellite until an indicator signals that the antenna is preliminarily aligned, fixing the receiver antenna to the stable surface, and activating a device remote from the antenna to automatically perform final alignment of the antenna with the satellite.
    Type: Grant
    Filed: December 22, 1995
    Date of Patent: August 18, 1998
    Assignee: Hughes Electronics Corporation
    Inventor: Paul R. Anderson
  • Patent number: 5734349
    Abstract: The invention provides a multibeam antenna comprising:an array 11 of N.sub.e elementary sources 31; energy-focusing optical means comprising a reflector 10 or a lens; the array being situated in the focal zone of said focusing means: and a feed and control circuit cooperating with the N.sub.e primary sources 31 to produce N.sub.b beams each generated from a subgroup of the primary sources, some of which are shared between overlapping beams; the feed and control circuit comprising phase shifter means and attenuator means, said means being organized in N.sub.e feed channels for said N.sub.e primary sources, each feed channel including specific means for acting on the phase and the amplitude of an excitation signal in each feed channel;wherein each required beam is generated by the multibeam antenna solely by acting on the phase and the amplitude of the excitation delivered to each elementary source forming a portion of said beam; andwherein the number of sources N.sub.i contributing to a beam i, 1.ltoreq.i.
    Type: Grant
    Filed: January 17, 1996
    Date of Patent: March 31, 1998
    Assignee: Alcatel Espace
    Inventors: Regis Lenormand, Bernard Coulomb, Jean-Philippe Marre, Michel Tatard, Christian Rigal, Charles Villemur
  • Patent number: 5677697
    Abstract: An optical heterodyne system provides the radiation source and beam scan control of a millimeter wave (MMW) array antenna. The heterodyne system is an optical feed system to produce the MMW by mixing the optical outputs from two lasers, distribute the signal source to an array of radiating elements through a Rotman lens and optical fibers, generate the differential phase shift for beam scan in the optical domain, change the beam direction by switching the input laser being used to illuminate the Rotman lens or by varying the frequency of one of the laser sources. The feed system includes a plurality n-1 lasers spaced along the transmit side of the lens, and a center laser disposed on the center axis of the transmit side. A l:n switch receives a command input to determine which of the n-1 lasers will operate. The beat frequency between the center laser operating frequency and that of the n-1 lasers is the MMW frequency.
    Type: Grant
    Filed: February 28, 1996
    Date of Patent: October 14, 1997
    Assignee: Hughes Electronics
    Inventors: J. J. Lee, Willie W. Ng, Gregory L. Tangonan
  • Patent number: 5668629
    Abstract: The system includes a base unit sensitive to infrared (IR) signals transmitted by a mobile remote unit to an IR receiver which is placed behind a rotating set of signal blocking blinders whose position at any time defines a view angle with a position known with precision resulting in the IR signal reception scanning across an area. The base unit detects when the peak strength of the signal occurs and utilizes this data to determine the exact effective angle between the axis of the IR signal and the base unit to create an error signal used by the base unit to position the camera mounted thereon. Receivers for TILT and two PAN positions, PAN 1 and PAN 2, are used to include range calculations for ZOOM functions. Command circuitry to override the automatic tracking function is provided in the base unit.
    Type: Grant
    Filed: September 25, 1995
    Date of Patent: September 16, 1997
    Assignee: ParkerVision, Inc.
    Inventors: Jeffrey L. Parker, David F. Sorrells, John D. Mix, Richard P. Daber
  • Patent number: 5652750
    Abstract: A cellular communications satellite system is disclosed which comprises a plurality of ground-based base stations, mobile stations, and at least one orbiting satellite for relaying signals between the base stations and mobile stations. A Plurality of feederlinks are used between the base stations and the satellite for transmitting signals and power from the ground stations to the satellite.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: July 29, 1997
    Assignee: Ericsson Inc.
    Inventors: Paul W. Dent, Amer A. Hassan
  • Patent number: 5579015
    Abstract: The invention pertains to an electronic sweep device with integrated active lens and light source.The device includes a bundling of superimposed channels C which are separated by thin metal planes P that include, in front of a metal short-circuit plane (10), illumination organs (S) and phase displacement organs (B).The invention makes it possible to create a compact electronic sweep device which eliminates the parasitic reflection phenomena between illuminator and lens for the purpose of controlling a hyperfrequency beam.
    Type: Grant
    Filed: July 1, 1985
    Date of Patent: November 26, 1996
    Assignee: Societe d'Etude du Radant
    Inventor: Gerard Collignon
  • Patent number: 5559519
    Abstract: Apparatus for calibrating a phased array antenna having a plurality of active modules and a test manifold. An RF antenna, which is both a transmitting and receiving antenna is positioned at a far field range from the antenna to be calibrated. A receiver is connected to the output of the far field receiving antenna and the output of the test manifold of the antenna to be calibrated for the transmit calibration and a transmitter is connected to the far field transmitting antenna and the test manifold for a receive calibration, a command phase and amplitude for each steering angle of each module of the antenna being calibrated. The phase and amplitude data from the test manifold is compared with the phase and amplitude data of the far field range to obtain an error signal, and the error signal is combined with the command amplitude and phase iteratively until the error signal is minimized for each module of the antenna.
    Type: Grant
    Filed: May 4, 1995
    Date of Patent: September 24, 1996
    Assignee: Northrop Grumman Corporation
    Inventor: David K. Fenner
  • Patent number: 5515060
    Abstract: An active array antenna for use, for example, in a radar system, includes elemental antennas, each with a T/R module, distributed over a circular aperture. For lowest cost, the aperture is thinned. The T/R modules are operated at maximum output, to achieve maximum DC-to-RF efficiency, and for simplicity. A phase controller controls the phase shift which is imparted by each module to its signal, to form a main beam and its associated sidelobes. A perturbation phase generator portion of a phase controller adds a perturbation phase shift selected, in conjunction with a particular thinning distribution, to form a relatively wide null in the sidelobe structure, in which signal transduction is reduced. In a radar context, this null may be placed on a source of ground clutter or a jammer.
    Type: Grant
    Filed: May 11, 1995
    Date of Patent: May 7, 1996
    Assignee: Martin Marietta Corp.
    Inventors: Moayyed A. Hussain, Kai-Bor Yu, Koeunyi Bae
  • Patent number: 5239668
    Abstract: This invention relates to a satellite signalling system. A ground station receives paging signals from an earth-bound terminal, and an up-link radio transmitter/antenna transmits paging signals and control signals to a satellite in earth orbit. An up-link receiver coupled to the satellite receives the paging and control signals. A down-link transmitter is coupled to an antenna whose beam may be directed in a predetermined sequence to a plurality of locations on earth as paging signals are transmitted to earth.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: August 24, 1993
    Assignee: Motorola, Inc.
    Inventor: Walter L. Davis
  • Patent number: 5128687
    Abstract: An antenna including a lens that has an array of radiating elements located on a focal arc, each radiating element corresponding to a different transmission beam direction; and a beam launcher having a plurality of phased arrays and a plurality of internal probes, each of the plurality of internal probes being electrically coupled to a corresponding one of the radiating elements, the phased arrays for space feeding a selected one or more of the radiating elements with signals so as to generate corresponding transmission beams from the lens.
    Type: Grant
    Filed: May 9, 1990
    Date of Patent: July 7, 1992
    Assignee: The Mitre Corporation
    Inventor: Francis A. Fay
  • Patent number: 5103233
    Abstract: A multipurpose system provides radar surveillance for air traffic control purposes. The system includes four separate active phased-array antennas, each with .+-.45.degree. coverage in azimuth, from 0.degree. to 60.degree. in elevation. Each antenna element of each phased-array antenna is coupled by a low-loss path to the solid-state amplifier associated with a transmit-receive (TR) module. Each antenna produces a sequence of pencil beams, which requires less transmitted power from the TR modules than a fan beam, but requires more time because the pencil beam must be sequenced to cover the same volume as the fan beam. In order to scan the volume in a short time, the PRF is responsive to the elevation angle of the beam, so higher elevation angles use a higher PRF. Low elevation angle beams receive long transmitter pulses for high power, and pulse compression is used to restore range resolution, but the long pulse results in a large minimum range within which targets cannot be detected.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: April 7, 1992
    Assignee: General Electric Co.
    Inventors: John J. Gallagher, Jerome E. Freedman, Michael S. Perry
  • Patent number: 5084707
    Abstract: An antenna system provided with an adjustable reflection coefficient includes at least one radiation source (1), a reflective surface (12) positioned in the path of the radiation generated by the active radiation source (1) and 9 light-generating means (13, 14). The reflective surface (12) is provided with semiconductor surfaces (2.i.j) with a spacer-therebetween and the light of the light-generating means (13, 14) is used to illuminate the semiconductor surfaces (2.i.j) such that, after reflection of the radiation generated by the active radiation source at the reflecting semiconductor surfaces, a radiation beam is obtained in which the beam width and beam orientation can be varied by adjusting the light intensity so as to adjust the phase of the reflection of the semiconductor surfaces.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: January 28, 1992
    Assignee: Hollandse Signaalapparaten B.V.
    Inventor: Bernard J. Reits
  • Patent number: 4983982
    Abstract: An array antenna for a radar is shown in include a phase shifter arrangement wherein, in the transmitting mode, ferrite phase shifters are used to collimate and direct a beam of transmitted radio frequency energy originating at a feed horn and, in the receiving mode, amplifiers and diode phase shifters are used to amplify and to focus received radio frequency energy on a feed horn.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: January 8, 1991
    Assignee: Raytheon Company
    Inventor: Raymond A. Roberge
  • Patent number: 4951061
    Abstract: An interferometric acoustooptic signal processor utilizing a circular antenna array to cover a 360 degree field of view. Each antenna element of the array is connected to an input port of a Butler matrix. The signals are phase shifted within the Butler matrix and applied to a multi-channel periodic Bragg cell, resulting in generation of one or more acoustic waves therein. A laser beam is used to illuminate the Bragg cell and is modulated due to interaction with the acoustic waves, resulting in diffraction of the laser beam and generation of a diffracted beam pattern output from the Bragg cell. A Fourier transform lens focuses the diffracted laser beam on a back focal plane at a point characterized by two perpendicular coordinates designating the input signal power spectrum and the angle of incidence in relation to the antennae, respectively.
    Type: Grant
    Filed: June 1, 1989
    Date of Patent: August 21, 1990
    Assignee: Her Majesty the Queen in right of Canada, as represented by Minister of National Defence of Her Majesty's Canadian Government
    Inventor: Jim P. Lee
  • Patent number: 4929956
    Abstract: A wideband, true time delay antenna beamforming network 10 for millimeter wave phased array antennas is disclosed herein. The beamforming network 10 of the present invention includes a laser 30 for generating a beam B of electromagnetic energy. The beamforming network 10 further includes an electro-optic modulator 40 for modulating the beam B in response to an input signal S modulated about a first frequency f.sub.o. A first antenna array 80 generates a first electromagnetic field pattern P by radiating the modulated beam B' in a first direction. The present invention further includes a constrained lens 90 for receiving the first field pattern P and for emitting an antenna driver feed beam F in a second direction in response thereto. An antenna array driver 115 electro-magnetically coupled to the constrained lens 90 by the feed beam F provides a set of signals modulated about the first frequency f.sub.o to drive an antenna array 20.
    Type: Grant
    Filed: September 10, 1988
    Date of Patent: May 29, 1990
    Assignee: Hughes Aircraft Company
    Inventors: Jar J. Lee, Huan-Wun Yen
  • Patent number: 4862180
    Abstract: A signal processor for radar systems having phased array antenna structures. The processor determines the angle of arrival of the signal from a discrete energy source. The separate elements or output ports of the antenna structure are sampled to form a matrix of signal values. These values are converted into polynomial expressions consistent with one of the spectral estimating methods of maximum entropy, maximum likelihood, and thermal noise. The roots of the polynomial expressions are found and compared to the distance of the unit circle in a pole-zero diagram. Roots sufficiently close to the unit circle are selected as representative of the source signal peaks and the angular directions to such sources are determined by the corresponding angular location of the selected roots in the pole-zero diagram.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: August 29, 1989
    Assignee: Westinghouse Electric Corp.
    Inventor: Raymond G. Martin
  • Patent number: 4825216
    Abstract: An optical limited scan antenna system is disclosed. The invention is a dual lens type array antenna system with a small array feed network. The system includes a bootlace-type microwave aperture lens with an array of radiating elements arranged along the linear aperture and an array of pickup elements arranged along the curved inner surface, an intermediate optical corrective lens, a feed array for illuminating the corrective lens with a source distribution, and with a power divider and phase shifters arranged to drive the feed array. The corrective lens is circularly symmetric (spherically symmetric in the three-dimensional case), and its radially varying dielectric constant is such that a point source on its surface is focused to an image point on the inner surface. The pickup elements on the curved surface of the aperture lens are coupled to corresponding radiating elements on the linear aperture.
    Type: Grant
    Filed: December 4, 1985
    Date of Patent: April 25, 1989
    Assignee: Hughes Aircraft Company
    Inventor: Edward C. DuFort
  • Patent number: 4803490
    Abstract: A shipboard search radar in which an antenna beam is stepped up and down in elevation to keep the beam pointed approximately toward the horizon even though the ship may be rolling and/or pitching.
    Type: Grant
    Filed: October 26, 1984
    Date of Patent: February 7, 1989
    Assignee: ITT Gilfillan, A Division of ITT Corporation
    Inventor: Bradford E. Kruger
  • Patent number: 4764738
    Abstract: An agile beam control for optical phased array wherein a great multiplicity of substantially identical wave guides are employed, each of which comprises a plurality of electrodes along the length thereof, and wherein electrical voltages are applied to such electrodes in a predetermined pattern so as to effect the necessary control without creating a totally unworkable arrangement of different voltages and wiring arrangements which are intolerable. More specifically, a binary voltage distribution is provided to such electrodes, whereby alternate ones of the electrodes in a first electrode position of such wave guides are interconnected and have a given voltage applied thereto. The remaining electrodes at that position are energized with the same magnitude of voltage but of reverse polarity.
    Type: Grant
    Filed: March 26, 1987
    Date of Patent: August 16, 1988
    Assignee: D. L. Fried Associates, Inc.
    Inventor: David L. Fried