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.
出处
《现代雷达》
CSCD
北大核心
2010年第11期5-8,共4页
Modern Radar
基金
国防预研基金资助项目
关键词
步进频率连续波雷达
探地雷达
合成孔径成像
stepped frequency continuous wave radar
ground penetrating radar
synthetic aperture imaging
