关键词: 共形完全匹配层, 矢量ABC吸收边界, 电磁散射计算

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 CPML 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 PEC（PMC） boundary condition is changed into vector Absorbing Boundary Condition（ABC），and functional formula of CPML backed by vector ABC is deduced.Numerical examples show that CPML backed by vector ABC is of high-precision and high-efficiency.

Key words: conformal Perfectly Matched Layers（PML）, vector absorbing boundary condition, electromagnetic scattering computation