Patent RU-2154285-C1 (RU)
Title: Radar for range measurement ( versions )
Inventor: SOROKIN V A
IPC: G01S13/34
Filed: 1999-07-12
Granted: 2000-08-10
Abstract: FIELD: radiolocation. SUBSTANCE: radar is radar with continuous emission of radio waves and linear frequency modulation of signal. In agreement with first version radar has generator of sawtooth periodic oscillations, transmitter with frequency modulation and transmitting antenna connected in series, receiving antenna, mixer, amplifier of converted signal, digital frequency discriminator, storage circuit and threshold unit connected in series, former of measurement interval of modulation band and pulse former connected in series, first generator of clock pulses, AND gate and counter connected in series and second generator of clock pulses. Second input of mixer is connected to second output of transmitter whose third output is coupled to input of former of measurement interval of modulation band, second input of AND gate is linked to output of former of measurement interval of modulation band, second input of pulse former is connected to output of first generator of clock pulses, first output of pulse former is linked to second input of counter, output of second generator of clock pulses is coupled to second input of digital frequency discriminator, output of counter is connected to first input of storage register whose second input is linked to second output of pulse former, output of storage register is connected to third input of digital frequency discriminator. According to second version radar includes reversible counter, digital-to-analog converter, generator of sawtooth periodic oscillations, frequency modulation transmitter and transmitting antenna connected in series, source of reference analog signal whose output is linked to second input of digital-to-analog converter, receiving antenna, mixer, amplifier of converted signal, digital frequency discriminator, storage circuit and threshold unit connected in series, former of measurement interval of modulation band and pulse former connected in series, first generator of clock pulses, AND gate and counter connected in series, second generator of clock pulses connected in series. Second input of mixer is connected to second output of transmitter whose third output is linked to input of former of measurement interval of modulation band, second input of AND gate is coupled to output of former of measurement interval of modulation band, second input of pulse former is connected to output of first generator of clock pulses, first output of pulse former is connected to second input of counter, output of second generator of clock pulses is connected to second input of digital frequency discriminator, storage register and digital comparator, output of counter is linked to first input of storage register whose second input is connected to second output of pulse former, output of storage register is connected to third input of digital frequency discriminator and to input of digital comparator, output of digital comparator is linked to first input of reversible counter whose second input is connected to first output of pulse former. EFFECT: decreased probability of false transmission of signal of detection of target and increased precision of measurement of range to target. 2 cl, 9 dwg