DIRECTION FINDER Russian patent published in 2002 - IPC

FIELD: radio engineering, applicable for detection, reception, direction finding and analysis of phase-manipulated signals against the background of interference. SUBSTANCE: the direction finder has receivers 1 and 2, local oscillators 3 and 4, mixers 5,6 and 7, intermediate-frequency amplifiers 5.1 and 6.1, band-pass filter 8, amplitude detectors 9 and 10, integrators 11 and 12, threshold units 13, 14 and 23, coincidence unit 15, gates 16 and 24, phase detectors 17 and 26, frequency multiplier-by-two 18, delay unit 19, multiplexer 20, amplifiers 21 and 25, 90-deg. phase shifter 27, squarers 28, 30, 31 and 33, scaling multiplexer 29, subtracter 32, adder 34 and a recorder. EFFECT: enhanced sensitivity of the direction finder at measurement of low phase shifts, corresponding to low bearings, to a source of signal radiation. 2 dwg