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Title: Ultra-wideband mutual coupling compensation of active electronically scanned arrays in multi-channel radar systems

Abstract

Technologies pertaining to the calibration of ultra-wide-band active-electronically-scanned arrays to compensate for transmit and receive mutual coupling between array elements and/or non-ideal isolated channels are described herein. A plurality of near-field measurements are taken by way of probe or probes that may be moved among a plurality of positions aligned with respective elements in the array. For each position of the probe, each of the elements of the array is stimulated to transmit or receive a calibration signal to or from the probe, respectively. Frequency-domain transfer functions are computed from the received signals by the probe or the element for each of the array elements in each of the positions of the probe. The inverse of the matrix of transfer functions comprise frequency-domain transmit and receive correction factors that are used to modify desired array inputs/outputs such that the modified signals correct for mutual coupling between elements in the array.

Inventors:
Issue Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1650752
Patent Number(s):
10615495
Application Number:
15/714,617
Assignee:
National Technology & Engineering Solutions of Sandia, LLC (Albuquerque, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01S - RADIO DIRECTION-FINDING
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01Q - ANTENNAS, i.e. RADIO AERIALS
DOE Contract Number:  
NA0003525
Resource Type:
Patent
Resource Relation:
Patent File Date: 09/25/2017
Country of Publication:
United States
Language:
English

Citation Formats

Loui, Hung. Ultra-wideband mutual coupling compensation of active electronically scanned arrays in multi-channel radar systems. United States: N. p., 2020. Web.
Loui, Hung. Ultra-wideband mutual coupling compensation of active electronically scanned arrays in multi-channel radar systems. United States.
Loui, Hung. Tue . "Ultra-wideband mutual coupling compensation of active electronically scanned arrays in multi-channel radar systems". United States. https://www.osti.gov/servlets/purl/1650752.
@article{osti_1650752,
title = {Ultra-wideband mutual coupling compensation of active electronically scanned arrays in multi-channel radar systems},
author = {Loui, Hung},
abstractNote = {Technologies pertaining to the calibration of ultra-wide-band active-electronically-scanned arrays to compensate for transmit and receive mutual coupling between array elements and/or non-ideal isolated channels are described herein. A plurality of near-field measurements are taken by way of probe or probes that may be moved among a plurality of positions aligned with respective elements in the array. For each position of the probe, each of the elements of the array is stimulated to transmit or receive a calibration signal to or from the probe, respectively. Frequency-domain transfer functions are computed from the received signals by the probe or the element for each of the array elements in each of the positions of the probe. The inverse of the matrix of transfer functions comprise frequency-domain transmit and receive correction factors that are used to modify desired array inputs/outputs such that the modified signals correct for mutual coupling between elements in the array.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {4}
}

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Works referenced in this record:

Mutual coupling based calibration technique for structurally deformed phased array apertures
patent, September 2014


Antenna array with reduced mutual coupling between array elements
patent, January 2017


Mutual coupling method for calibrating a phased array
patent, April 2008


Phase alignment of electronically scanned antenna arrays
patent, June 1991