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A microwave photon correlation 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 the problems of calculating preset waveform deviation, low accuracy, and high difficulty.

Active Publication Date: 2022-07-08
DALIAN UNIV OF TECH
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Problems solved by technology

At present, the acquisition of the space-time two-dimensional random radiation field information in the far-field area is mainly based on the system configuration and the parameters of the transmitted signal through calculation and estimation. There are deviations in the preset waveforms, the calculation of the actual radiation field distribution is difficult and the accuracy is low, which is not conducive to stable and accurate imaging
In addition, it is difficult to obtain random radiation field information by means of measurement in the far-field target area in terms of actual engineering implementation, and the practicability is extremely low
Therefore, there are great challenges in the practical application of the technical means to obtain the time-space two-dimensional random radiation field information in the far-field area by calculation and actual far-field measurement.

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  • A microwave photon correlation imaging system based on microwave far-field local optical reconstruction
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  • A microwave photon correlation imaging system based on microwave far-field local optical reconstruction

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Embodiment

[0024] A microwave photon correlation imaging system based on microwave far-field local optical reconstruction, comprising 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 transformation unit 8, correlation calculation imaging unit 9, microwave receiving antenna 10, low noise amplifier 11, the aforementioned parts are connected by optical fibers or cables in turn, or transmitted through free space.

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

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Abstract

The invention relates to a microwave photon correlation imaging system based on microwave far-field local optical reconstruction, and belongs to the technical field of photoelectric imaging. In microwave radar correlation imaging, it is necessary to accurately know the distribution of the random detection radiation field in the target area, and this radiation field distribution cannot be directly detected in real time. The current microwave radar correlation imaging technology mainly obtains the random detection radiation field distribution by calculation according to the system configuration and the parameters of the transmitted signal. There is a deviation in the waveform, and the calculation of the actual radiation field distribution is difficult, which is not conducive to stable and accurate imaging. Therefore, there are great challenges in the practical application of microwave radar correlation imaging. The invention realizes microwave radar correlation imaging based on the local optical reconstruction of the measured random detection radiation field distribution, and fundamentally avoids the above-mentioned problem of estimation deviation.

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 correlation imaging is a radar correlation imaging technology that does not depend on and is not limited to the relative motion of the target by correlating the radiation field of the two-dimensional random detection signal with the sampled echoes to achieve high-resolution imaging within the beam. Prospects. For related literature, see: [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 Space-Time Two-Dimensional Stochastic Radiation Field, Doctoral Dissertation, University of Science and Technology of China, 2011. [0005] At present, microwave ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/89
CPCG01S13/89
Inventor 赵明山谷一英李晓洲钱坤刘若仙于润泽韩秀友
Owner DALIAN UNIV OF TECH
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