Conformal PML with vector ABC undersurface for scattering problem

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part I

Article type: Research Article

Authors: Zhang, Yongjie^a | Sun, Qin^a

Affiliations: [a] School of Aeronautics, Northwestern Polytechnical University, Xi'an, P.R. China

Abstract: Perfectly matched layers (PML) are the layers of electromagnetic wave absorbing elements designed for the mesh truncation of an open domain in a harmonic or modal analysis. It is an artificial anisotropic material that is transparent and heavily lossy to incoming electromagnetic waves. Conformal PML (CPML) is a convex and smooth shell region made up of lossy anisotropic medium. Generally, a conformal PML region is backed by a PEC boundary condition or a PMC boundary condition. But there are some reflections back into the computational domain by the PEC (PMC) boundary condition. In order to reduce the reflections, the traditional PEC (PMC) boundary condition is changed into vector absorbing boundary condition (ABC), and functional formula of conformal PML backed by vector ABC is deduced in this paper. Numerical experiments show that conformal PML backed by vector ABC is high-precision and high-efficiency.

Keywords: Conformal PML, vector absorbing boundary condition, electromagnetic scattering

DOI: 10.3233/JAE-2010-1094

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 1-2, pp. 39-45, 2010