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| NUMERICAL SIMULATION OF TIME-DOMAIN EM SCATTERING BY SHALLOW SUBSURFACE OBJECTS |
| Fang Guangyou①; Zhang Zhongzhi①;Wang Wenbing② |
| ①China Research Institute of Radiowave Propagation, Xinxiang 453003;②Xi'an Jiaotong University, Xi'an 710049 |
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Abstract The time-domain Electromagnetic(EM) scattering by buried objects in dispersive media is calculated by using FD-TD method. The FD-TD formula in Debye dispersive media(both the complex permeability and the complex permittivity are described by Debye equations) are deduced, and the absorbing boundary condition is given. The validity of FD-TD method in lossy media is verified through comparing the FD-TD s result and other one. The propagation of transient pulses in dispersive media is studied in detail. The scattering pulses and the wiggle traces for typical buried objects are given.
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Received: 24 May 1994
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1996, Vol. 18 
