无人机载微型SAR系统设计与实现

摘要

针对无人机微型化发展对合成孔径雷达（SAR）系统的微型化需求，该雷达系统设计方案采用调频连续波体制、功能及系统一体化、射频直接调制及数字解调和芯片化设计等技术，降低了系统复杂度，减少了系统的体积、重量和功耗，实现了小体积、轻重量、低功耗的微型 SAR系统。分析了调频连续波体制SAR的成像算法及其地面动目标显示（GMTI）处理技术。通过微型 SAR系统在小型无人机平台上的飞行试验，试验结果验证了系统的有效性和可行性。%For the application in miniature UAV,the synthetic aperture radar(SAR)system needs mini-aturization.A small size,light weight,low power miniature SAR system is proposed,in which FMCW sys-tem,function and system integration design,RF direct modulation and demodulation,chirp design are em-ployed.The imaging algorithm and GMTI processing of the FMCW SAR are analyzed.The effectiveness and feasibility of the miniature SAR is verified through flight test onboard a small UAV.