PHASE DIRECTION FINDER Russian patent published in 2003 - IPC

FIELD: radiolocation, radio navigation, determination of angular coordinate of radiation source of phase-keyed signal. SUBSTANCE: phase direction finder incorporates first 1 and second 2 receiving antennas, first 3 and second 4 receivers, first 5, second 6 and third 14 multipliers, first 7 and second 8 narrow-band filters, first 9 and second 21 90 degrees phase inverters, phase detector 10, first 11 and second 16 indicators, correlator 12, unit 13 of controlled delay, low-pass filter 15, extremity regulator 17, measuring device 18, first 19, second 20, third 22 and fourth 23 squarers, scaling multiplier 24, subtracter 25 and adder 26. EFFECT: increased operational sensitivity of direction finder while measuring small phase shifts determining direction to radiation source of phase-keyed signal. 3 dwg