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

Abstract

The invention discloses a microwave photon dual-band radar detection method. Two different intermediate frequency linear frequency modulation signals are utilized to perform polarization multiplexingmodulation of retaining positive and negative second-order sidebands on optical carriers, and optical carrier linear frequency modulation signals only retaining positive and negative second-order sidebands are generated on two cross polarization states of obtained modulated optical signals; after the modulated optical signals are converted into electrical signals, quadruplicated frequency linear frequency modulation signals of two bands contained in the electrical signals are separated, and serve as radar detection signals to be transmitted to a target; and at the same time, the electrical signals of the two bands reflected by the target are combined into one path, the modulated optical signals serve as reference optical signals, frequency conversion and dechirping processing of an opticaldomain is performed on the combined electrical signals to obtain two intermediate frequency signals carrying information of the target, and the information of the target is extracted from the two intermediate frequency signals. The invention also discloses a microwave photon dual-band radar. The microwave photon dual-band radar detection method and microwave photon dual-band radar provided by theinvention have the advantages of a microwave photon technology and a dual=band radar technology at the same time, is simple in implementation structure, and is high in detection efficiency.

Description

technical field [0001] The invention relates to a microwave photon radar detection method, in particular to a microwave photon dual-band radar detection method and the microwave photon dual-band radar. Background technique [0002] Radar is the main means for humans to detect and identify all-weather targets. Multi-functional, high-precision, and real-time detection has always been the goal pursued by radar researchers. In order to achieve high-performance target detection, imaging, recognition, and classification, it is necessary for the radar system to generate large-bandwidth detection signals and process the received signals quickly and in real time. However, limited by the operating bandwidth and nonlinear effects of electronic devices, it is difficult to realize the generation, control and processing of large-bandwidth signals based on electronic technology (see [Q.Li, D.Yang, X.Mu, Q.Huo, "Design of the L-band wideband LFM signal generator based on DDS and frequency ...

AI Technical Summary

Problems solved by technology

However, no dual-band radar realized by microwave photonic technology has been reported so far.

Images