METHOD FOR PHASED RADIO DIRECTION FINDING AND AUTOMATIC PHASED RADIO DIRECTION FINDER

摘要

FIELD: radio navigation and radio reconnaissance. SUBSTANCE: method involves reception of radio signal by two spaced antennas, formation of first, second, and third heterodyne signals whose frequencies are unequal to those of radio signals, attenuation of one of heterodyne signal level, bifurcation of heterodyne signal, frequency conversion of received radio signals with aid of first and third heterodyne signals, formation of first and second intermediate-frequency voltages, frequency conversion of second heterodyne signal with aid of first heterodyne signal, as well as second heterodyne signal with aid of third one, and shaping of third and fourth intermediate-frequency voltages, respectively, formation of fifth and sixth intermediate- frequency voltages, and measurement of phase shift between them. Automatic phased radio direction finder has first and second antennas 1.5, first, second, and third heterodynes 2,3,4, first and second high-frequency amplifiers 6,8, adjustable attenuator 7, first, second, third, and fourth signal mixers 9,15,11,13, first, second, and third bifurcators 10,12,14, first, second, third, fourth, fifth, and sixth band filters, 16,19,26,27,17,and 18, first and second adders 20,21, first and second intermediate-frequency amplifiers 22,23, first and second frequency changers 24, 25, phase meter 28, reference-voltage source 29, and comparison circuit 30. EFFECT: improved reliability of target direction finding. 9 cl, 1 dwg