地下三维目标电磁散射的矩量法计算
Scattering from 3-D Targets in the Subsurface Using MOM
-
摘要: 该文给出了一种用层状介质中的混合势积分方程(MPIE)和基于RWG基函数的矩量法计算地下三维目标电磁散射的精确快速实施方法。对MPIE的RWG矩量法的开发、计算性能做了研究，尤其是对其中的多个不同形式的Sommerfeld积分的快速全波数值离散复镜像计算方法做了仔细研究。该文的实施方法退化到自由空间后的计算结果与解析解Mie Series吻合的很好，而且地下平板的计算结果也与以往公布结果吻合得很好，证实了该文实施方法的可行、高效、精确。除此以外，该文还计算了其它形状目标在不同大小、不同埋藏深度、以及不同地层媒质下的电磁散射特征。Abstract: In this paper, an accurate and efficient implementation approach of the Method of Moments (MOM) is developed to compute scattering from 3-D targets in the subsurface, which is based on the Mixed Potential Integral Equation (MPIE) in layered media and the RWG basis function. The implementation skill and computing performance of the proposed approach are studied in detail. In particular, how to efficiently calculate various different Sommerfeld integrals (SIs) is numerically investigated with the discrete complex images technique. The computed results of the targets in free space are in agreement with Mie Series results and the computed results of subsurface flat are also in agreement with the published data, which shows the reliability, efficiency and accuracy of the developed approach. Furthermore, the EM scattering of other shaped targets is computed at different size, buried depth, and subsurface medium.
-
Michalski K A, Mosig J R. Multilayered media Greens functions in integral equation formulations[J].IEEE Trans. on Antennas and Propagation.1997, 45(3):508-519[2]Harrington R F. Field Computation by Moment Methods. New[3]York:Macmillan,1968, Melboume, FL: Krieger, reprint 1982.[4]Chao J C, Liu Y J, Rizzo F J, Martin P A, Udpa L. Regularized integral equations for curvilinear boundary elements for[5]electromagnetic wave scattering in three dimensions. IEEE Trans[J].on Antennas and Propagation.1995, 43:(12):1416-1422[6]Hua Y, Sarkar T K. Generalized pencil-of-function method for extracting poles of an EM system from its transient response[J].IEEE Trans. Antennas Propagat.1989, 37(2):229-234[7]Aksun M I. A robust approach for the derivation of closed-form Greens functions[J].IEEE Trans. Microwave Theory Tech.1996, 44(5):651-658[8]盛新庆. 计算电磁学要论. 北京：科学出版社，2004: 21-27.[9]Rao S M, Wilton D R, Glisson A W. Electromagnetic scattering by surfaces of arbitrary shape. IEEE Trans. Antennas Propagation., 1982, AP-30(3): 409-418. [8] Fang D G, Yang J J, Delisle G Y. Discrete image theory for horizontal electric dipoles in a multilayered medium. IEE Proc.-H, 1988, 135(5): 297-303.[10]Pasi Yla-Oijala, Matti Taskinen. Efficient formulation of closed-form Greens functions for general electric and magnetic sources in multilayered media[J].IEEE Trans. on Antennas and Propagation.2003, 51(8):2106-2115[11]Cui T J, Wiesbeck W, Herschlein A. Electromagnetic scattering by multiple three-dimensional scatterers buried under multilayered mediaPart II: Numerical implementations and results[J].IEEE Trans. Geosci. Remote Sensing.1998, 36(2):535-546 -
计量
- 文章访问数: 2639
- HTML全文浏览量: 92
- PDF下载量: 719
- 被引次数: 0
下载:
