Microwave photon multi-band radar detection method and microwave photon multi-band radar

Abstract

The invention discloses a microwave photon multi-band radar detection method. Among them, the generation method of the multi-band microwave detection signal is as follows: M channels of DC optical carriers with different wavelengths are combined and then divided into two channels; a broadband chirp signal is modulated on one of the channels to generate a frequency sweep with M frequency sweep comb teeth Optical frequency comb, the interval between the teeth of the sweeping comb is the same as the wavelength difference of the corresponding DC optical carrier; the other optical signal modulates the upper single-frequency radio frequency signal to generate a multi-wavelength optical frequency comb signal, and then converts the M comb teeth of known wavelengths are separated; the frequency-sweeping optical frequency comb and M comb teeth of known wavelengths are coupled into one channel and then photoelectric conversion is performed, that is, multi-band microwave detection signals. The invention also discloses a microwave photon multiband radar. The invention has the advantages of high frequency and large bandwidth of the photon technology, can realize real-time high-resolution multifunctional detection, and simultaneously solves the problem of frequency overlap when deskewing and processing multi-band echo signals.

Description

technical field [0001] The invention relates to a radar detection method, in particular to a microwave photon multi-band radar detection method and a microwave photon multi-band radar. Background technique [0002] Microwave photonic technology has the characteristics of large bandwidth, low transmission loss, anti-electromagnetic interference, etc., and can provide high-frequency, large-bandwidth arbitrary waveform generation, so it can well overcome some electronic bottleneck problems, improve and improve multiple technical performances of traditional radar, Become the key technology of next-generation radar. In recent years, many microwave photonic radar schemes have been proposed to obtain radar transmission signals with high carrier frequency and large bandwidth, but most of these schemes are based on single-band radar transmission signals. In actual scenarios, due to the different electromagnetic reflection characteristics of targets for signals of different bands, a ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technologies and provide a microwave photon multi-band radar detection method, which has the advantages of high frequency and large bandwidth of photon technology, can realize real-time high-resolution multi-functional detection, and solves multiple problems at the same time. The problem of frequency overlap when deskewing and processing echo signals of band radar

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