| 引用本文: | 董婧雯，李若明，李王哲. 微波光子雷达逆合成孔径成像[J]. 雷达科学与技术, 2021, 19(2): 225-232.[点击复制] |
| DONG Jingwen, LI Ruoming, LI Wangzhe. Microwave Photonic Radar for Inverse Synthetic Aperture Imaging[J]. Radar Science and Technology, 2021, 19(2): 225-232.[点击复制] |
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| 摘要: |
| 微波光子逆合成孔径成像雷达，发挥光子大带宽、低传输损耗、抗电磁干扰等优势，可以提升成像分辨率，并有助于构建分布式阵列雷达，实现精确的三维成像。本文介绍了中国科学院空天信息创新研究院在微波光子雷达逆合成孔径成像方面的成果。首先，搭建了微波光子雷达，基于光子倍频技术产生宽带雷达信号，基于光子去斜处理进行回波信号接收，系统工作在Ku波段，带宽600MHz，实现了对暗室内合作目标和外场非合作目标的二维ISAR成像。在此基础上，结合光射频传输技术和波分复用技术，搭建一发多收的微波光子光纤分布式阵列雷达，在实验室内实现了对3个角反射器的精确三维成像。上述试验结果验证了微波光子技术应用于雷达成像领域的可行性和提升系统关键性能的潜力。 |
| 关键词: 微波光子雷达 逆合成孔径 分布式阵列 二维成像 三维成像 |
| DOI：DOI:10.3969/j.issn.1672-2337.2021.02.015 |
| 分类号:TN958;TN29 |
| 基金项目:国家重点研发计划（No.2018YFA0701900，2018YFA0701901）；国家自然科学基金（No.61701476，61690191） |
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| Microwave Photonic Radar for Inverse Synthetic Aperture Imaging |
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DONG Jingwen, LI Ruoming, LI Wangzhe
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National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China
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| Abstract: |
| Microwave photonic (MWP) inverse synthetic aperture radar (ISAR), benefiting from unique advantages of photonics such as wide bandwidth, low transmission loss and inherent immunity to electromagnetic interference, achieves improved imaging resolution and large-scale distribution capacity for accurate three dimensional (3D) imaging. This paper introduces the achievements of the Chinese Academy of Sciences in MWP ISAR imaging. An MWP radar is developed by employing the photonic frequency doubling based signal generation and photonic-assisted stretch processing. The system operates in Ku band with a bandwidth of 600 MHz, and is eva-luated through a series of ISAR imaging tests both in a microwave anechoic chamber and in a field trial. Enabled by wavelength-division multiplexing and radio-over-fiber techniques, an extended MWP radar with a fiber-distri-buted antenna array is further established and accurate 3D imaging of three trihedral corner reflectors is achieved. The results verify the feasibility of MWP radar in 2D and 3D imaging and show its potential in improving the key performance of radar imaging. |
| Key words: microwave photonic radar inverse synthetic aperture distributed array 2D imaging 3D imaging |
