19 November 1985 Fiber Optic Transversal Filters for RF Direction Finding
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A wideband electro-optic direction finding (DF) processor employing a network of fiber optic delay lines is described. This DF filter offers a potential instantaneous bandwidth of 20 GHz and allows for multiple, simultaneous beam angular responses with peaks which are independent of frequency. Preliminary results of an eight-laser feasibility test model DF device with two transversal filters show good agreement between predicted and measured angular responses. This experimental matched delay filter operates in the 200-1000 MHz frequency range and can simultaneously monitor two angles of arrival. The laboratory results obtained in this investigation suggest that the fiber optics matched delay filter can be useful for wideband direction finding.
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S. A. Pappert, S. A. Pappert, C. T. Chang, C. T. Chang, M. N. McLandrich, M. N. McLandrich, } "Fiber Optic Transversal Filters for RF Direction Finding", Proc. SPIE 0559, Fiber Optics: Short-Haul and Long-Haul Measurements and Applications III, (19 November 1985); doi: 10.1117/12.949599; https://doi.org/10.1117/12.949599


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