Phase sensitive spectrum analyzer

Details Phase sensitive spectrum analyzer Phase sensitive spectrum analyzer

1979-08-13

1981-10-27

Buczinski, S. C.

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

324 77K, 324 83R, 324 96, 343 5SA, 343 9PS, 350 9613, 356349, 364713, 364822, G01S 502, G01R 2316, G02B 514, G01B 902

Patent

active

042977045

ABSTRACT:
Apparatus is provided comprising a laser source, collimating optics for collimating light provided by the laser source, focusing optics for focusing the collimated light provided by the collimating optics, and a detector array disposed at the focal plane of the focusing optics. Two surface acoustic wave transducers are disposed adjacent to one another and adjacent to an optical path between the collimating and focusing optics. The surface acoustic wave transducers are individually connected to antennas which are oriented substantially parallel to one another. The surface acoustic wave transducers launch surface acoustic waves which interact with the laser light and cause the light to be deflected in proportion to the amplitude and frequency of signals applied to the surface acoustic wave transducers by the antennas. The beams deflected by the two surface acoustic waves result in an interference pattern created at the detector array. A microcomputer is provided and coupled to the detector array for comparing the amplitude of the main sidelobes of the interference pattern which is indicative of the direction of arrival of energy received by the two antennas.

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M. K. Barnoski et al., 1978 (IEEE) Ultrasonics Symposium Proceedings, Cat. #78CH1344-1SU, p. 74.

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