Microwave photon multiband radar detection method and microwave photon multiband radar

Abstract

The invention discloses a microwave photon multiband radar detection method. Specifically, a multiband microwave detection signal generation method comprises the following steps of: combining M pathsof direct-current optical carriers with different wavelengths, and dividing the combined direct-current optical carriers into two paths; modulating a broadband linear frequency modulation signal in one path to generate a sweep-frequency optical frequency comb with M sweep-frequency comb teeth, and keeping the interval between the sweep-frequency comb teeth the same as the wavelength difference ofa corresponding direct-current optical carrier; modulating the other path of optical signal into a single-frequency radio frequency signal to generate a multi-wavelength optical frequency comb signal,and then separating M comb teeth with known wavelengths contained in the multi-wavelength optical frequency comb signal; combining the sweep-frequency optical frequency comb and M comb teeth with known wavelengths into one path, and then performing photoelectric conversion so as to obtain a multiband microwave detection signal. The invention also discloses a microwave photon multiband radar. Themethod has the advantages of high frequency and large bandwidth of photon technology, real-time and high-resolution multifunctional detection can be realized, and the problem of frequency overlappingduring dechirping processing of multiband echo signals is solved.

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 ...

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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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