地下目标的瞬态电磁散射
TRANSIENT EM FIELDS SCATTERING BY UNDERGROUND OBJECTS
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摘要: 本文运用时域有限差分法(FDTD)计算埋地物体的瞬态电磁散射,研究了目标的电磁脉冲响应与介质参数和地下结构的关系,为时域探地系统的目标检测和识别提供了一定的理论依据。本文的方法适用于任意形状的柱体目标以及任意二维地下结构,也易于推广到三维的情形。
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关键词:
- 瞬态电磁场; 散射; 时域有限差分法
Abstract: Transient EM field scattering by underground objects using finite-difference method in time-domain (FDTD) is calculated, and object s response of an EM pulse related to dielectric parameters and underground structure is presented. Conclusions of this method can be used as theoretical evidences of object detecting and discriminating. The method can be applied to circumstances of arbitrary cylinder objects and two-dimensional underground structure, and can be developed to three-dimensional circumstances. -
范国新,陈平.电波科学学报,1992, 7(3):1-20.[2]Oristagio M L, Hohman G W. Geophysics, 1984, 49(7): 870-894.[3]Taflove A, Brodwin M E. IEEE Trans. on MTT, 1975, MTT-23(8): 623-630.[4]Mur G. IEEE Trans, on EMC, 1981, EMC-23(4): 377-382.[5]Umandar K R, Tafflove A. IEEE Trans. on EMC, 1982, EMC-29(9): 397-405.[6]Reineiz A, Jecko B. IEEE Trans. on AP, 1989, AP-37(11): 1361-1369. -
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