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Proceedings Paper

Adaptive wideband optical nulling for an antenna system
Author(s): William L. LeComte; Scott R. Henion; Peter A. Schultz
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Paper Abstract

Nulling is a technique to reduce unwanted interference by selecting specifically against some characteristic of the interference. In the case of an antenna with several subapertures or beams, spatial discrimination against the interference is implemented through appropriate complex weighting of the antenna outputs prior to combining to make the net antenna sensitivity orders of magnitude lower in the direction of the interference. This paper describes how optics has been used to achieve a wide- bandwidth (2 GHz) null centered at 6 GHz for the case of two antenna outputs. The broadband null-depth is approximately 40 dB over the 5 to 7 GHz RF band. Such a deep null over this wide band could not be achieved using microwave technology alone.

Paper Details

Date Published: 10 June 1994
PDF: 8 pages
Proc. SPIE 2155, Optoelectronic Signal Processing for Phased-Array Antennas IV, (10 June 1994); doi: 10.1117/12.177406
Show Author Affiliations
William L. LeComte, Lincoln Lab./MIT (United States)
Scott R. Henion, Lincoln Lab./MIT (United States)
Peter A. Schultz, Lincoln Lab./MIT (United States)

Published in SPIE Proceedings Vol. 2155:
Optoelectronic Signal Processing for Phased-Array Antennas IV
Brian M. Hendrickson, Editor(s)

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