基于微波光子技术的可重构雷达系统  

Reconfigurable Radar System Enabled by Microwave Photonics Technology

作　　者：曹继明 崇毓华 梅理 朱宇鹏 段宗明 CAO Jiming;CHONG Yuhua;MEI Li;ZHU Yupeng;DUAN Zongming(Anhui Antenna and Microwave Engineering Laboratory,Hefei 230088,China;The 38 th Research Institute,China Electronics Technology Group Corporation,Hefei 230088,China)

机构地区：[1]安徽省天线与微波工程实验室,安徽合肥230088 [2]中国电子科技集团公司第三十八研究所,安徽合肥230088

出　　处：《电子科技》2021年第9期36-40,共5页Electronic Science and Technology

基　　金：国家重点研发计划(2019YFB2203201)。

摘　　要：针对传统电学雷达系统难以在一套硬件设备上实现宽频段范围内工作波段切换的问题,文中提出了一种可重构微波光子去调频雷达成像系统方案。该方案在发射机中利用级联电光调制器结构实现雷达发射波形的可重构,通过调整本振信号的频率使雷达的发射频段能够灵活改变。在接收机中利用平行结构马赫增德尔调制器实现雷达回波信号的去调频接收。通过逆合成孔径雷达成像实验评估了所提出的光子辅助雷达系统的性能。该光子雷达系统在Ku波段的不同带宽下进行验证,发射信号带宽分别为1 GHz和4 GHz,接收机模数转换器的采样率为100 MSa·s^(-1)。实验结果证明微波光子技术能为可重构雷达提供有效的实现方案。For the problem that operating band switching of traditional electrical radar system is hard with a single hardware platform,a reconfigurable microwave photonics radar based on de-chirp processing technology is proposed.Two cascaded Mach-Zehnder modulators are employed to implement a reconfigurable radar transmitter,and the operating band of the photonics radar are changed flexibly by adjusting the frequency of local signal.At the receiver end,radar echo signals are sent to a dual-parallel modulator to perform de-chirp processing.The performance of the proposed photon-assisted radar system is evaluated by inverse synthetic aperture radar imaging experiments.The photon radar system is validated at different bandwidths in the Ku band.The transmitted signal bandwidth is 1 GHz and 4 GHz,respectively.The sampling rate of the receiver's analog-to-digital converter is 100 MSa·s^(-1).The results show that the microwave photonics technology can provide solutions for implementing a reconfigurable radar structure.

关 键 词：可重构雷达 微波光子雷达 去调频接收 光子辅助 微波光子学 雷达成像 光子上变频 雷达信号产生 

分 类 号：TN95[电子电信—信号与信息处理]