提出了一种基于光纤链路传输的远程超宽带混沌成像雷达系统。该系统包括中心站、光纤传输链路和基站。在中心站,改进型Colpitts振荡器产生超宽带混沌信号,经上变频后作为雷达探测信号。探测信号通过激光器的外调制技术转换为相应的光信号,经光纤链路传输到基站并转换为相应电信号,由宽带天线发射。目标物反射的回波信号经电光转换和下变频在中心站被采集。利用相关运算和后向投影算法,中心站可实现对目标物的二维空间成像。实验结果表明,该系统经过10 km光纤传输后可对单个和多个目标物进行远程成像。成像的距离分辨率和方位分辨率分别为6 cm和8 cm。 A remote ultra-wideband chaotic imaging radar system based on optical fiber link transmission is proposed. The system includes a central station, fiber optic transmission links and base stations. At the central station, an improved Colpitts oscillator generates an ultra-wideband chaotic signal, which is upconverted to a radar detection signal. The detection signal is converted into a corresponding optical signal by an external modulation technique of a laser, transmitted to a base station via an optical fiber link and converted into a corresponding electric signal, which is transmitted by a broadband antenna. Echo signals reflected by the target are collected at the central station by electro-optic conversion and downconversion. Using correlation and backward projection algorithms, the central station can achieve two-dimensional imaging of the target. The experimental results show that the system can remotely image single and multiple targets after transmission of 10 km optical fiber. Imaging distance resolution and azimuth resolution of 6 cm and 8 cm respectively.