Two-dimensional acousto-optic processor using circular antenna array   with a Butler matrix

Jim P. Y. Lee

doi:10.1117/12.58855

1 September 1992 Two-dimensional acousto-optic processor using circular antenna array with a Butler matrix

Jim P. Y. Lee

Author Affiliations +

Optical Engineering, Vol. 31, Issue 9, (September 1992). https://doi.org/10.1117/12.58855

Abstract

A two-dimensional acousto-optic signal processor is shown to be useful for providing simultaneous spectrum analysis and direction finding of radar signals over an instantaneous field of view of 360 deg. A system analysis with emphasis on the direction-finding aspect of this new architecture is presented. The peak location of the optical pattern provides a direct measure of bearing, independent of signal frequency. In addition, the sidelobe levels of the pattern can be effectively reduced using amplitude weighting. Performance parameters, such as mainlobe beamwidth, peak-sidelobe level, and pointing error, are analyzed as a function of the Gaussian laser illumination profile and the number of channels. Finally, a comparison with a linear antenna array architecture is also discussed.

Citation Download Citation

Jim P. Y. Lee "Two-dimensional acousto-optic processor using circular antenna array with a Butler matrix," Optical Engineering 31(9), (1 September 1992). https://doi.org/10.1117/12.58855

Published: 1 September 1992

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