METHOD OF RADIO COUNTERMEASURES Russian patent published in 2013 - IPC G01S7/38 

FIELD: radio engineering, communications.

SUBSTANCE: radio signals received on a moving object from a radiating radar are modulated by phase on shifted Doppler frequency by serrated oscillation with index 2 kπ (k=1, 2…) and frequency f_M, exceeding the range of Doppler frequencies, the modulated signals are divided into three components - a central one and two peripheral, the central component is modulated by phase with serrated oscillation and the same frequency f_m, but with the opposite inclination of the saw, peripheral components are phase-modulated with serrated oscillations with the same opposite inclination of the saw, but with frequencies f_M+|Δf₁| and f_M-|Δf₂|, where |Δf_1,2|<<f_M, the modulated central and peripheral components are summed by the double-channel system, one of two produced summary radio signals is shifted by phase by 180 degrees, and in turns both signals are radiated from spatially distanced points of the object, the frequency of radiated signals switching is carried out as exceeding the pass band of the radar selector. To increase trend towards tracking loss, drifting is carried out by speed, as well as phase modulation with narrow-band noise at frequency of received signal.

EFFECT: increased efficiency of radio countermeasures.

6 dwg