Fast solution of volume-surface integral equation for scattering from composite conducting-dielectric targets using multilevel fast dipole method

作者：Chen Xinlei; Gu Changqing^*; Niu Zhenyi; Li Zhuo

来源：International Journal of RF and Microwave Computer-Aided Engineering, 2012, 22(5): 624-631.

DOI：10.1002/mmce.20620

• electromagnetic scattering (EM)
• volume-surface integral equation (VSIE)
• method of moments (MoM)
• equivalent dipole-moment method (EDM)
• multilevel fast dipole method (MLFDM)

This article presents a fast solution to the volumesurface 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 RaoWiltonGlisson and the SchaubertWiltonGlisson basis functions as dipole models with equivalent dipole moments. In the MLFDM, a simple Taylor's series expansion of the terms R-alpha (alpha = 1, -1, -2, -3) and (R)over-cap(R)over-cap in the formulation of the EDM transforms the interaction between two equivalent dipoles into an aggregationtranslationdisaggregation 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.

• 出版日期2012-9
• 单位南京大学