SPOT JAMMING UNIT FOR RADIO DETECTION AND RANGING STATIONS Russian patent published in 2008 - IPC H04K3/00 

FIELD: radio engineering.

SUBSTANCE: invention may be used for radio electronic suppression of pulse-doppler and pulse radio detection and ranging stations. Result is achieved by analysing signal spectrum received within the given frequency range, digital filtration, each signal analyzing and generation of jamming with spectrum similar to the shape of each signal to be suppressed. For this purpose, Fast Fourier Transform unit, digital multi-channel filter and intermediate frequency of frequency channel adjuster are included into the each frequency channel of this unit. The latter is represented with phase-locked-loop frequency circuit being the part of direct digital synthesizer of reference frequency, divider with variable division factor, phase detector, low frequency filter and phase-locked-loop frequency circuit adder unit.

EFFECT: generation of jamming with selective ability and high spectral density of power budget.

1 dwg