步进频率连续波前视探地雷达的研究  

A Study on a SFCW Forward-looking Ground Penetrating Radar

作　　者：陆必应[1] 宋千[1] 王建[1] 周智敏[1] 

机构地区：[1]国防科技大学电子科学与工程学院,长沙410073

出　　处：《现代雷达》2010年第11期5-8,共4页Modern Radar

基　　金：国防预研基金资助项目

摘　　要：研制了一种步进频率连续波探地雷达系统,能对载体前方较大范围浅地表穿透实时二维成像。该系统采用双发射天线和接收天线的组合线阵接收方位回波,将接收天线数量降低一半;利用分频段多级均衡校正、设置参考通道、数字中频接收等方案保证系统具有良好的幅频、相频特性;利用中频耦合对消方案抑制收发耦合;利用快速双站后向投影算法进行合成孔径成像。试验表明,系统可实现浅地表穿透成像探测。A stepped frequency continuous wave forward-looking ground penetrating radar is developed,which can perform real time synthetic aperture imaging of shallow buried targets over large areas ahead.The number of receive antennas is halved using two transmit antennas to achieve the same azimuth aperture.An frequency equalizer,a reference receive channel and digital IF receiver is used to achieve good transfer characteristic of the ultra wide band system.The direct coupling of T/R antennas is cancelled at intermediate frequency.The bistatic fast back projection technique is proposed to focus synthetic aperture echoes.Experimentation results show that real time images of shallow buried targets can be provided.

关 键 词：步进频率连续波雷达 探地雷达 合成孔径成像 

分 类 号：TN958[电子电信—信号与信息处理]