A comparison of anisotropic PML to Berenger's PML and its application to the finite-element method for EM scattering

The use of an anisotropic material for the boundary truncation of the finite element method is considered, The anisotropic material properties can be chosen such that a planewave incident from free space into the anisotropic halfspace has no reflection, Because there is no reflection, the material is referred to as a perfectly matched layer (PML). The relationship between the anisotropic PML and the original PML proposed by Berenger [2] is considered, The anisotropic PML is applied to the finite-element solution of electromagnetic (EM) scattering from three-dimensional (3-D) objects, Numerical results are presented to demonstrate the accuracy of the PML.