Radar velocity measurement technology

Abstract

The invention provides the radar velocity measurement technology. A radar velocity measurement device comprises a first fiber delayer, a first photovoltaic conversion device, a duplex device, a power amplification device, a coherent processor and a receiver. The first fiber delayer is in connection with the coherent processor through the first photovoltaic conversion device, and is used for generating delay pulse signals; the duplex device is in connection with the receiver and the power amplification device, and is use for emitting signals through the receiver on one hand, and on the other hand sending received pulse signals into the power amplification device for amplification. According to the utility model, the pulse signals are delayed through the fiber delayer, and the echo of each emission pulse is only coherent with the delay copy pulse of the pulse, thereby obtaining idea coherence. The technical scheme of the invention solves the problem that a PD radar of the prior art is difficult to obtain ideal coherence, meanwhile costs less, and is easy to realize and popularize.

Description

technical field [0001] The invention belongs to the technical field of radar communication, and in particular relates to a radar speed measurement technology. Background technique [0002] In applications such as early warning radar, it is hoped that the radar has a large power range; in airborne and spaceborne radars, it is urgent to have a radar transmitter with high efficiency and small size; however, traditional PD radars are difficult to solve these problems. PD radar, also known as pulse Doppler radar, as its name implies, is a pulse radar that uses the Doppler effect to detect target information. One of the basic characteristics of pulse Doppler radar is to detect useful signals in the background clutter with a wide distribution and strong power in the frequency domain and time domain. This is usually done through the automatic detection of the radar. The radar divides the area to be scanned into several units, and scans all the units through the movement of the slid...

AI Technical Summary

Problems solved by technology

Traditional PD radar requires the transmitter to be a fully coherent transmitter, often using traveling wave tubes, solid-state components, etc., but the full coherent transmitter has high cost, low power, low efficiency, and large size

However, the self-excited oscillator transmitter (magnetron) with low cost, high power, high efficiency and small size cannot measure speed.

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