Raytheon Company

Mks Instruments, Inc.

Motorola Corporation

Other

Jack J Schuss

Thomas V Sikina

Jeffrey C Upton

Kaichiang Chang

Ilya Bystryak

Richard L O'Shea

Jerome D Hanfling

Joseph E Hilliard, Jr

Jesse E Ambrosina

Feng Tian

Eli Brookner

Souheil Benzerrouk

Gregory M Fagerlund

David Lam

Phillip W Thiessen

Patrick J Makridakis

Abdul Rashid

David Menzer

Xing Chen

Siddharth P Nagarkatti

Robert S Isom

Vadim Lubomirsky

Michael G Sarcione

David M Upton

Stephen M Sparagna

William Kennedy

Edward A Geyh

Igor Elkin

Steven P Kemp

Oscar J Bedigian

Joseph M Gwinn, Iv

Robert J McMorrow

Joseph C Yeh

William J Payne

John R Mather

Peter R Maloney

Tariq R Adhami

Thomas Y Sikina

Jama A Mohamed

Edward Geyh

Dennis E Nieskoski

Izabella Furman

Siddarth Nagarkatti

Karen A Rapoza

Tung M Huynh

Described herein is an apparatus and a method for an antenna array calibration device and method. The device comprises a radio frequency/optical (RF/optical) data center having at least one optical input/output; N single mode fibers (SMF) each having a proximal end connected to the at least one optical input/output of the RF/optical data center and a distal end, where N is a positive integer; N optical/RF dish calibrators each having an optical input/output connected to the distal end of the at least one SMF input/output; N coaxial transmission lines each having a proximal end connected to one of the RF input/output of the N optical/RF dish calibrators and a distal end; and N dish antennas each connected to the distal end of one of the N coaxial transmission lines.

Antenna array calibration device and method

Method and system of calibrating and cohering at least one radar antenna in receive (RX) mode and transmit (TX) mode, comprising performing RX mode calibration on at least one radar antenna using radio frequency (RF) far field calibration source, determining RF phase Øusing RF far field calibration source for each at least one radar antenna, operating at least one radar antenna in RX mode with at least one near field antenna to determine plurality of RX mode phases in at least one radar antenna and at least one near field antenna, operating at least one radar antenna in TX mode with at least one near field antenna to determine plurality of TX mode phases in at least one radar antenna and at least one near field antenna, and deriving TX mode calibration phases as function of determined RX mode phases and determined TX mode calibration phases.

RX and TX coherence in radar antenna using near field antenna

A unit cell of an array antenna includes an integrated dilation and feed circuit and an associated radiator assembly. The integrated dilation and feed circuit includes an asymmetric dilation layer, an asymmetric combiner layer, a symmetric feed layer and a symmetric slot layer. Feed circuits on the feed layer are configured to couple radio frequency (RF) signals to/from a pair of orthogonally disposed slot elements symmetrically disposed on the slot layer of the integrated dilation-feed circuit. The slot layer couples signals to and from the radiator assembly. Such unit cell may be used to provide an array antenna including an active electronically scanned array (AESA) antenna.

Polarization versatile radiator

A dual band frequency selective radiator array includes a high band radiator array disposed on a dielectric layer for transmitting and receiving high band radar signals; a low band radiator array disposed on a front side of the high band radiator array for transmitting and receiving low band radar signals; a frequency selective surface (FSS) tuned to the high band radar signals forming a surface of the low band radiator array and passes the high band radar signals to the high band radiator array; and a single aperture disposed in front of the low band radiator array, the high band radiator array and the FSS for both the low band radiator array and the high band radiator array for transmitting and receiving the radar signals.

Dual band frequency selective radiator array

A dual band dipole radiator array includes a high band radiator array disposed on a dielectric layer for transmitting and receiving high band radar signals; a low band radiator array disposed on a front side of the high band radiator array for transmitting and receiving low band radar signals; a foam material between the low band radiator array and the high band radiator array for support; and a single aperture for both the low band radiator array and the high band radiator array for transmitting and receiving the radar signals, where the low band radiator array is comprised of a plurality of dipole structures disposed within the foam material and tuned to pass through high band radar signals to or from the high band radiator array.

Dual band dipole radiator array

Methods and apparatus to calibrate an array by sequentially calibrating elements in a subarray with respect to each other using a satellite. The satellite is repeatedly illuminated for calibrating the elements using reference elements to determine plane fronts from which active elements can be calibrated with respect to each other.

Satellite-based phased array calibration

Methods and apparatus for a dual polarization super-element radiator assembly. In one embodiment, an assembly comprises a first waveguide, a series of slot couplers formed in the first waveguide, first and second conductive strips, a second waveguide adjacent to the first waveguide, a series of notches formed in a conductive material extending along or parallel to the longitudinal axis of the second waveguide, the notches having respective throats, a series of slots located proximate the notch throats, and a third conductive strip disposed over and aligned with the notches, wherein the slot couplers and the notches provide a dual polarization super-element radiator.

Methods and apparatus for dual polarized super-element phased array radiator

Methods and apparatus for a phased array radar system including an array comprising columns of super-elements containing radiator elements located along a length of the super-element, wherein the super-elements form the columns such that super-elements are arranged end-to-end, wherein the super-elements are arranged in the column at randomized locations to reduce sidelobes. In a further embodiment, super element lengths can be randomized.

Method and apparatus for reducing sidelobes in large phased array radar with super-elements

Described embodiments calibrate an array antenna using near-field antenna measurements individually for each antenna element in an antenna under test (AUT). A signal is received at a first AUT antenna element from an antenna probe assembly by transmitting from the antenna probe assembly at each of multiple known probe locations in a near-field of the AUT. A signal is received at each probe location by transmitting from the first antenna element of the AUT to the antenna probe assembly. The received signals are combined into a combined signal for the first antenna element that de-correlates multi-path in the combination result. The combined signal is processed to generate a calibration coefficient for the first AUT antenna element. Remote boundary condition (RBC) testing is performed to reduce temporal instability. The multiple known probe locations lie on one of the following: a planar surface, a cylindrical surface, and a spherical surface.

Method and system for characterizing an array antenna using near-field measurements

Methods and apparatus for providing a passive non-redundant signal distribution system including a passive combiner coupled to the first and second controlled signal sources to receive first and second signals, the combiner having an output, and a passive splitter coupled to the combiner output to provide reference signals to signal sinks, all to provide reliable dissemination of a reference signal despite failures of signal generation or distribution.

Methods and apparatus for highly reliable signal distribution

A radar receiver includes a bank of matched filters for use in processing return signals received from a remote target. In some embodiments, the radar receiver is capable of generating accurate estimates of target range and range rate based on returns from a single transmitted pulse having a low time-bandwidth product. In at least one embodiment, a computationally efficient interpolation technique is used to generate an estimate of an actual target Doppler frequency based on output signals of the bank of matched filters.

Radar system using matched filter bank

Methods and apparatus for providing a radar system that rejects intermodulation products than can generate false targets. In one embodiment, a method includes transmitting a first signal at a first time at a first frequency to detect a target within a first altitude range, determining a range from a first receive time to a second receive time for possible signal return from the target within the first altitude range, receiving the possible signal return from the target in a frequency band of interest based upon the first frequency while transmitting a second signal at a second frequency spaced a selected frequency distance from the first frequency to place transmit feedthrough outside of the receive frequency band of interest and false target return outside the frequency band of interest for rejecting intermodulation products.

Method and apparatus for rejecting intermodulation products

Methods and apparatus for a super-element assembly for a phased array radar aperture, the super-element assembly having a first port and a second port to receive a first signal at the first port to generate a main beam, and receive a second signal at the second port to generate an image beam for generating scan volume coverage using the main and image beams.

Methods and apparatus for volumetric coverage with image beam super-elements

Methods and apparatus for a calibration system including a support structure movable over an array, a super-element secured to the support structure to obtain information at selected locations in relation to the array, and a processor to compute a sum of voltages for determining a level of calibration for the array.

Calibration of large phased arrays using fourier gauge

A method for controlling pulsed power that includes measuring a first pulse of power from a power amplifier to obtain data. The method also includes generating a first signal to adjust a second pulse of delivered power, the first signal correlated to the data to minimize a power difference between a power set point and a substantially stable portion of the second pulse. The method also includes generating a second signal to adjust the second pulse of delivered power, the second signal correlated to the data to minimize an amplitude difference between a peak of the second pulse and the substantially stable portion of the second pulse.

Method and system for controlling radio frequency power

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Newton, MA, United States of America

Jack J Schuss