平衡馈电超宽带探地雷达系统的研究与实现  

Research and implementation of the balanced feeding UWB ground penetrating radar system

作　　者：刘丽华[1,2] 陈洁[1] 方广有[1] 

机构地区：[1]中国科学院电子学研究所,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《电波科学学报》2010年第2期313-317,共5页Chinese Journal of Radio Science

基　　金：国家高技术研究发展计划项目(No.2007AA12Z124)

摘　　要：提出了一种新型平衡馈电超宽带探地雷达系统的设计方法,并研制了实际的电路系统。该雷达系统关键技术包括发射机平衡脉冲的实现,取样脉冲产生方法以及取样门的设计。发射机电路产生脉冲宽度为500 ps,峰值电压幅度为8 V的平衡脉冲信号。接收机采样带宽高达4.3 GHz,为平衡取样门结构,对宽带信号进行采样和保持。对雷达系统进行穿透探测实验,实验结果表明:雷达系统能成功接收携有目标信息的雷达回波信号,并能检测到混凝土实体后面的金属物。该雷达系统适合浅层高分辨率目标检测的应用。The design method of a novel balanced feeding ultra-wideband transceiver system for the ground penetrating radar is presented,and the practical circuit system is implemented.The key technology of the radar system contains the balanced pulse transmitter the sampling pulse generator and the balanced sampling gate.The transmitter generates a pair of balanced pulse signals with duration of 500 ps and peak-peak voltage of 8 V.The sampling bandwidth of receiver is 4.3 GHz.It utilizes the balanced sampling gate to sample and hold the UWB signals.The penetrating experimental results verify that the radar system can successfully sample the echo signals with target information and detect the metal target under the concrete object.Therefore,this system is proper for short-range detecting applications with high resolution.

关 键 词：平衡馈电 超宽带 探地雷达 等效采样 目标检测 

分 类 号：TN957[电子电信—信号与信息处理]