Device of ultra-wideband receiver based on microwave photons and design method

Abstract

The invention discloses an ultra-wideband receiver device based on microwave photons and a design method. A light-operated beam forming function module and a light channelization function module are connected through light transmission by a light wavelength division multiplexing technology, so the process of broadband receiving of microwave radio-frequency signals through light domain processing is realized. Microwave signals of different antenna columns are modulated to optical carriers with different wavelengths, and different delay paths are selected through optical wavelength switching torealize different beam directions; radio frequency signal information of different lines is carried through a multi-wavelength optical frequency comb, and the radio frequency signal information is directly transmitted into a microwave photon channelization module in an optical mode. In the module, light with different wavelengths is distributed to different channelization units through wavelengthdivision demultiplexing, intermediate frequency channelization signals of corresponding columns are obtained through the different channelization units and finally combined together, and the purpose of beam forming is achieved. The microwave photon ultra-wideband receiver device provided by the invention has a large real-time processing bandwidth and a large dynamic range.

Description

technical field [0001] The invention belongs to the technical fields of microwave photon technology and phased array detection radar. Background technique [0002] The radar modulation methods in the modern battlefield are complex and changeable, and broadband and ultra-wideband radars are equipped with a large number of equipment, and electromagnetic signals are increasingly dense. Therefore, electronic detection radar is required to have the characteristics of large instantaneous bandwidth, high sensitivity, large dynamic range, etc., and be able to identify multiple signals arriving at the same time. In response to the above-mentioned real-time reconnaissance requirements, the current traditional electronic method of using phased array phase shifting to realize beam scanning, and combining analog channelization and digital signal processing to realize channelization is limited by factors such as bandwidth loss, leakage, and interference of electronic circuit devices. The...

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Problems solved by technology

[0005] It should be noted that the research reported so far is still focused on the realization of a single optical beamforming and optical channelization functions, and the design of the overall architecture of the UWB receiver is still limited to the following figure 1 In the processing flow shown, each function needs to undergo an electrical-to-optical conversion, and the two are connected by cables. The dynamic range of the system limits its application in actual radar systems, and it is necessary to seek an all-optical processing method

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