A fast volume-surface integral equation solver for scattering from high-contrast materials

作者：Deng Xiaoqiao^*; Gu Changqing; Xu Bingzheng; Li Zhuo

来源：Progress in Electromagnetics Research M, 2012, 27: 83-95.

• Adaptive cross approximation algorithms
• Background medium
• CPU time
• EM scattering
• High contrast
• Inhomogeneities
• Inhomogeneous materials
• Rao-Wilton-Glisson basis functions
• Scattering simulations
• System of equations
• Volume surface integral equations

This paper presents a generalized volume-surface integral equation (GVSIE) to solve electromagnetic (EM) scattering of high contrast inhomogeneous materials. Then the method of moments (MoM) is employed to solve the GVSIE. The GVSIE technique where the domain is represented by a corresponding uniform background medium coupled with a variation, together representing the overall inhomogeneity, is solve by the method of moments (MoM) using Schaubert-Wilton-Glisson (SWG) and Rao-Wilton-Glisson (RWG) basis functions. The adaptive cross approximation (ACA) algorithm combined with the equivalent dipole-moment (EDM) method are extended to reduce memory and CPU time. A highly effective preconditioning strategy is presented to solve the system of equations without any increase in the computational complexity. Experiments on several problems representative of scattering simulations are given to illustrate the potential of the above proposed techniques for solving EM scattering involving high contrast applications.

• 出版日期2012
• 单位南京航空航天大学