In-situ active impedance characterization of scanned array antennas
| DWPI Title: Method for characterizing mutual coupling between pairs of antenna elements, involves providing signal to first antenna element based upon mutual coupling between first antenna element and second antenna element |
| Abstract: 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. |
| Use: Method for characterizing mutual coupling between pairs of antenna elements. |
| Advantage: The method enables characterizing feed networks at a manufacturing or testing location for enabling mutual coupling effects to be determined both at manufacturing and/or testing location while the array antenna is in service operation in an effective manner. |
| Novelty: The method involves determining a mutual coupling between a first antenna element in a phased antenna array and a second antenna element for all possible antenna pairings in the phased antenna array during operation of a phased antenna array. A first signal is provided to the first antenna element based upon the mutual coupling between the first antenna element and the second antenna element, where radiation emitted from the phased antenna array is steered based upon the first signal. A second signal is provided to the second antenna element based upon the mutual coupling between the first antenna element and the second antenna element. |
| Filed: 1/15/2019 |
| Application Number: US16247932A |
| Tech ID: SD 12590.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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