FIELD: radioelectronic industry. SUBSTANCE: detector has first adder 2 and second adder 3, first feedback amplifier 9 and second feedback amplifier 10, using opposite surface acoustic waves delay lines 6 with first 4 and second 5 opposite pivots converters and centrally located output opposite pivot converter, output of which is connected with input of bandpass filter 12 and also with input of first 7 and second 8 intermediate opposite pivot converters. EFFECT: improved detecting capability. 1 dwg, 1 tbl
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