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In-situ active impedance characterization of scanned array antennas

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United States Patent

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10,720,703
July 21, 2020
View the Complete Patent at the US Patent & Trademark Office
Various embodiments presented herein relate to determining mutual coupling between a pair of antennas in an array antenna. Various operations presented herein enable comparison between a magnitude and phase of a signal transmitted from a first feed network (via a first antenna) and a magnitude and phase of a portion of the signal received at a second feed network (via a second antenna). Electrical effects engendered by any of the first feed network, a first switch, a first local circuit, the second feed network, a second switch, and a second local circuit can also be determined and their effects mathematically removed. Based upon the foregoing, a mutual coupling between the pair of antenna is determined.
16/ 247,932
January 15, 2019
1/1
H01Q 3/26 (20060101)H01Q 1/52 (20060101)G01R 29/10 (20060101)H01Q 3/34 (20060101)
STATEMENT OF GOVERNMENTAL INTEREST This invention was developed under contract DE-AC04-94AL85000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in this invention.