FIELD: physics, navigation.
SUBSTANCE: invention relates to high-speed radar engineering and can be used in designing a system for active protection of an object (sniper) from an ultrahigh speed small target. The method includes generating an instruction for triggering the active protection system of the object only when the duration of a second time interval is equal to half of a first time interval, where the first is generated between the onset and detection at a radar system of signals at differential frequency Fp4=(N+4)Fp and Fp3=NFp, respectively, where N is a number greater than 3, and the second is generated between the onset and detection of signals at differential frequency Fp2=3Fp and Fp1=Fp=Fdo+A=2Vofo/C+Btz, respectively, when the distance between the antenna of the radar station and the target D4=(Fp4-A+Fi/3)C/2B, D3=(Fp3-A+Fi/3)C/2B, D2=(Fp2-A+Fi/3)C/2B, D1=(Fp1-A+Fi/3)C/2B, where Fi=2Vifo/C is Doppler frequency, C is the speed of light, Vo is radial velocity of a safety ordnance, fo is the frequency of the emitted chirp signal, B=Fmdfm and A=Btz respectively denote the rate of change of frequency of the chirp signal and part of the frequency of the difference signal resulting from artificial delay by a time tz of the emitted chirp signal, Fm and dfm denote modulation frequency and frequency deviation of the chirp signal, respectively. The "Anti-sniper" radar set comprises an antenna, a delay element, two mixers, a chirp signal transmitter, a differential frequency filter, two continuous frequency generators, an analogue adder, a wide-band filter and a narrow-band filter, an amplitude detector, a limiting amplifier, a comparator, a pulse former, a count pulse generator, a bidirectional counter, a digital comparator, a monostable multivibrator, three AND elements, two OR elements, a halver, a switch, a memory unit and a code converter.
EFFECT: reduced weight, size and cost characteristics of radar for generating instructions for triggering protection systems.
2 cl, 2 dwg
