A unified look at Berenger's PML for general anisotropic media

The recently proposed general material-independent perfectly matched layer (GMIPML) and extended perfectly matched layer (EPML) techniques serve to adapt general dielectric and magnetic anisotropic media. Perfect matching is achieved both by the former, based on a straight generalization of Berenger's PML using a (D) over right arrow and (B) over right arrow formulation, and by the latter using an (E) over right arrow and (H) over right arrow formulation. In this paper, a general theory enclosing both formulations is proposed. (C) 2001 John Wiley B & Sons, Inc.