Microwave photon correlated imaging system based on microwave far-field local optical reconstruction

A technology that correlates imaging and microwave photons. It is used in radio wave measurement systems, radio wave reflection/re-radiation, instruments, etc. It can solve problems such as unfavorable stability, accurate imaging, heavy calculation, and difficulty, and achieve improved resolution. Effects of insufficient, large dynamic range, high modulation efficiency

CN111580100AActive Publication Date: 2020-08-25DALIAN UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-08-25

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Abstract

The invention relates to a microwave photon correlated imaging system based on microwave far-field local optical reconstruction, and belongs to the technical field of photoelectric imaging. In microwave radar correlated imaging, distribution of a random detection radiation field in a target area needs to be accurately known, and the distribution of the radiation field cannot be directly detected in real time. According to an existing microwave radar correlated imaging technology, random detection radiation field distribution is obtained mainly through calculation according to system configuration and emission signal parameters; due to the limitation of actual system implementation factors, signals actually transmitted by a transmitter have deviation relative to calculation of preset waveforms, the actual radiation field distribution calculation difficulty is large, stable and accurate imaging is not facilitated, and therefore great challenges exist in actual application of microwave radar correlated imaging. According to the method, microwave radar correlated imaging is realized on the basis of random detection radiation field distribution actually measured by local optical reconstruction, so that the problem of calculation and estimation deviation is fundamentally avoided.
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Description

technical field

[0001] The invention belongs to the technical field of photoelectric imaging, and relates to a microwave photon correlation imaging system based on microwave far-field local optical reconstruction. Background technique

[0002] Microwave correlated imaging is a radar correlated imaging technology that does not rely on and is not limited to the relative motion of the target through the correlation processing of the radiation field of the space-time two-dimensional random detection signal and the sampling echo to achieve high-resolution imaging within the beam. Prospects. For related literature, please refer to:

[0003] [1] Li Dongze, Research on Radar Correlation Imaging Technology, Doctoral Dissertation, National University of Defense Technology, 2014.

[0004] [2] Xu Hao, Research on Radar Imaging Based on Spatial Spectrum Theory and Spatiotemporal Two-dimensional Random Radiation Field, Doctoral Dissertation, University of Science and Technology of China...

Examples

Embodiment

[0024] A microwave photon correlation imaging system based on microwave far-field local optical reconstruction, including a random microwave signal source generation module 1, a microwave transmitting antenna array 2, a microwave receiving antenna 3, a microwave optical domain up-conversion unit 4, and an infrared CCD detector 5 , power divider 6, optical antenna array 7, light wave far-field conversion unit 8, correlation computing imaging unit 9, microwave receiving antenna 10, low noise amplifier 11, the aforementioned parts are connected by optical fiber or cable in turn, or transmitted through free space.

[0025] The random microwave signal source generation module 1 is used to generate microwave random radiation signals for microwave optical correlation imaging mode. The random microwave signal source is divided by a power divider, one of which is transmitted through the microwave transmitting antenna array 2, and the other enters the microwave far field Local optical de...