具有屏蔽腔和吸波材料的探地雷达天线的FDTD分析  

FDTD analysis of ground penetrating radar antennas with shields and absorbers

作　　者：刘立业[1] 粟毅[1] 毛钧杰[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院,湖南长沙410073

出　　处：《电波科学学报》2006年第3期422-427,共6页Chinese Journal of Radio Science

基　　金：国家高科技发展计划项目(2001AA132020)资助课题

摘　　要：天线是探地雷达系统的关键部件之一,系统要求天线具有较好的辐射波形以及一定的隔离度。给出了一种可用于探地雷达系统的分布电阻加载的变形TEM喇叭天线,并且采用三维FDTD方法分析了屏蔽腔和吸收材料对其辐射特性的影响。计算结果表明,通过加入屏蔽腔和吸收材料,可以减小收发天线之间的直耦信号,使目标回波信号更加明显,从而提高了系统的动态范围。One of the most critical hardware components of a ground-penetrating radar （GPR） is the antenna system. The important parameters of antennas, such as antenna bandwidth, radiation waveform, and crosscoupling, determine the GPR system performance. The modified TEM horn antenna with distributed resistorloaded is presented in the paper, and the radiation properties of antenna with the shield and absorbing material are studied through the three-dimensional finitedifference time-domain （FDTD） scheme. The simulations show that the coupled signal between the transmitter and receiver antennas is decreased through shields and absorbers, and the signal-to-clutter and the dynamic range of the GPR system can be improved effectively.

关 键 词：探地雷达 天线 FDTD方法 广义完全匹配吸收层 

分 类 号：TN821[电子电信—信息与通信工程]