地下目標的瞬態(tài)電磁散射
TRANSIENT EM FIELDS SCATTERING BY UNDERGROUND OBJECTS
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摘要: 本文運用時域有限差分法(FDTD)計算埋地物體的瞬態(tài)電磁散射,研究了目標的電磁脈沖響應與介質參數(shù)和地下結構的關系,為時域探地系統(tǒng)的目標檢測和識別提供了一定的理論依據(jù)。本文的方法適用于任意形狀的柱體目標以及任意二維地下結構,也易于推廣到三維的情形。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.
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范國新,陳平.電波科學學報,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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