Zero distance calibration system and method for pulse Doppler radar

Abstract

The invention relates to a zero distance calibration system and method for pulse Doppler radar. The calibration system comprises a circulator, a limiter, a low noise amplifier, isolators, a mixer, a delay line, an up-converter, a first amplifier, a second amplifier, a power divider and an antenna, wherein the circulator, the limiter, the first isolator, the low noise amplifier, the second isolator and the mixer which are sequentially connected in series constitute a reception channel; the delay line and impedance matching networks in front of and behind the delay line constitute a delay channel; the up-converter, the third isolator, the first amplifier, the fourth isolator, the second amplifier, the circulator and the antenna which are sequentially connected constitute a transmission channel; the delay channel is connected between the transmission channel and the reception channel, and electrical signals are converted into sound signals to be subjected to time delay propagation in sound transmission media.

Description

technical field [0001] The invention relates to the technical field of microwave and millimeter-wave radars. By applying the mature bulk acoustic wave delay line (L-band) to the zero-distance calibration system of microwave and millimeter-wave pulse Doppler radars, the zero-distance calibration is realized during radar debugging. A new technique for calibration. Background technique [0002] The existing radar zero-distance calibration system uses the radar to track and measure a preset fixed target in the near area, and then uses this fixed target (usually a fixed iron tower around the debugging site) as the benchmark for radar zero-distance calibration Value, zero-range calibration for pulse Doppler radar. The main defects of this system are as follows: First, due to the influence of external environment such as weather and wind, the shaking of the fixed target will affect the calibration accuracy; second, the distance of the fixed target is calibrated by positioning meth...

AI Technical Summary

Problems solved by technology

[0006] In view of the problems and defects in the original calibration method, such as low calibration accuracy, complex calibration system, low work efficiency, and the debugging site is easily affected by the climate, through the use of bulk acoustic wave delay line, radio frequency integrated assistant technology and integrated transceiver design technology , the present invention proposes a new zero-distance calibration system and method for pulse Doppler radar debugging, which improves the ranging accuracy and calibration efficiency of the radar

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