OPTOACOUSTIC RECEIVER Russian patent published in 1999 - IPC

FIELD: radio engineering; receiving complex signals and analyzing their amplitude spectrum. SUBSTANCE: receiver has receiving antenna, frequency changer, first mixer, heterodyne, second mixer, first +90 deg. phase shifter, first and second intermediate-frequency amplifiers, second +90 deg. phase shifter, first adder, first multiplier, first narrow-band filter, first amplitude detector, first switch, laser, collimator, first Bragg cell, first lens, first photodetector array, search unit, -90 deg. phase shifter, second adder, second multiplier, second, third, and fourth narrow- band filters, second, third, and fourth amplitude detectors, second, third, and fourth switches, second, third, and fourth Bragg cells, second, third, and fourth lenses, second, third, and fourth photodetector arrays. EFFECT: enlarged range of complex-signal search by frequency without extending heterodyne frequency control range by using additional receive channels. 5 dwg