METHOD OF GENERATING DOUBLE-FREQUENCY INTERFERENCE Russian patent published in 2013 - IPC G01S7/38 

FIELD: radio engineering, communication.

SUBSTANCE: radio signal received on a moving object from a radiating radar station is split into three components; the first component on a false Doppler frequency is phase-modulated by a slowly varying, for example, harmonic oscillation; the modulated first and second components are phase-shifted by balanced modulation; the shift value is selected equal to δ, |δ±ω_pr|, respectively, where δ satisfies the inequality $$(k-1)\frac{{\omega }_{pr}}{2}+\Delta \omega \prec \delta \prec k\frac{{\omega }_{pr}}{2}-\Delta \omega$$ (k=1,2,3,4, Δω is the bandwidth of the radar station at a first intermediate frequency). To eliminate stable zeros of direction-finding characteristics of radar stations, one of said components is further phase-modulated by meander from 0 to 180 degrees. High probability of disrupting is achieved by deviation on velocity and modulation of the third component on the phase narrowband noise.

EFFECT: high probability of disrupting tracking of the goniometric coordinator of a radar station with a wide range of variation of parameters of interfering signals.

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