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- Title
Fast solution of volume-surface integral equation for scattering from composite conducting-dielectric targets using multilevel fast dipole method.
- Authors
Chen, Xinlei; Gu, Changqing; Niu, Zhenyi; Li, Zhuo
- Abstract
This article presents a fast solution to the volume-surface integral equation for electromagnetic scattering from three-dimensional (3D) targets comprising both conductors and dielectric materials by using the multilevel fast dipole method (MLFDM). This scheme is based on the concept of equivalent dipole-moment method (EDM) that views the Rao-Wilton-Glisson and the Schaubert-Wilton-Glisson basis functions as dipole models with equivalent dipole moments. In the MLFDM, a simple Taylor's series expansion of the terms Rα (α = 1, −1, −2, −3) and R̂ R̂ in the formulation of the EDM transforms the interaction between two equivalent dipoles into an aggregation-translation-disaggregation form naturally. Furthermore, benefiting from the multilevel grouping scheme, the matrix-vector product can be accelerated and the memory cost is reduced remarkably. Simulation results are presented to demonstrate the efficiency and accuracy of this method. © 2012 Wiley Periodicals, Inc. Int J RF and Microwave CAE, 2012.
- Subjects
INTEGRAL equations; ELECTROMAGNETIC wave scattering; COMPOSITE materials; ELECTRIC conductivity; DIELECTRICS; DIPOLE moments; TAYLOR'S series
- Publication
International Journal of RF & Microwave Computer-Aided Engineering, 2012, Vol 22, Issue 5, p624
- ISSN
1096-4290
- Publication type
Article
- DOI
10.1002/mmce.20620