Accurate and efficient FDTD modeling of ground-penetrating radar antenna radiation

被引:29
作者
Holliger, K [1 ]
Bergmann, T [1 ]
机构
[1] ETH Honggerberg, Inst Geophys, CH-8093 Zurich, Switzerland
关键词
D O I
10.1029/1998GL900049
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
We present a 3-D finite-difference time domain (FDTD) solution of Maxwell's equations for modeling the near-field radiation of dipole antennas in ground-penetrating radar surveys. The antenna is represented as a conducting wire with a narrow gap in the middle. The electromagnetic field in the immediate vicinity of the wire is evaluated by numerical solution of an integral representation of Maxwell's equations. Integration contours and surfaces are defined by the finite-difference cells surrounding the wire. Everywhere else the electromagnetic wavefield is calculated using conventional FDTD approximations of Maxwell's equations. The accuracy of the algorithm has been tested by comparing the simulated near-field radiation of a dipole antenna between two dielectric media with corresponding experimental observations.
引用
收藏
页码:3883 / 3886
页数:4
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