有损耗介质中探地雷达测量的数值模拟  

Simulation of Ground Penetrating Radar in Lossy Medium

作　　者：吴俊军[1] 刘四新[1] 周峻峰[1] 

机构地区：[1]吉林大学地球探测科学与技术学院,长春130026

出　　处：《吉林大学学报（地球科学版）》2008年第S1期144-146,共3页Journal of Jilin University：Earth Science Edition

摘　　要：对探地雷达来说,理想的介质应该是无损耗的介质,也就是不导电的介质。然而,绝大多数的地球介质是不同程度导电的,这在很大程度上影响了雷达的探测性能。提高雷达频率可以改善雷达的探测性能。用时域有限差分软件对地质雷达在有损耗介质中的探测进行模拟,可以发现使用不同频率的雷达波测量,对于频散介质,频率的升高不仅使分辨率升高,探测深度降低,而且随着频率升高,相同深度介质反射波的到达时间缩短。For GPR,the ideal medium should be no loss of the medium,also is not the electric conduction medium.However,the majority of the Earth is a different medium degree of conductivity,which has largely affected the radar detection,Radar frequency can be increased to improve radar detection.The use of finite-difference time-domain software on GPR in a lossy medium for the detection simulation,can be found using different frequencies of radar measurement.For frequency dispersion medium,the increased frequency not only increased resolution,reduced probing depth,but also with the increased frequency,it shorts the arrival time at same depth of the reflection of the medium-wave.

关 键 词：探地雷达 麦克斯韦方程 时间域有限差分 有损耗介质 

分 类 号：P631.325[天文地球—地质矿产勘探]