Application of a hyperbolic grid generation technique to a conformal PML implementation

Recently proposed anisotropic material-based conformal perfectly matched la yer (PML) formulations are based on general orthogonal curvilinear coordina tes and, consequently, their practical application to a conformal finite-di fference time-domain (FDTD) method requires body-conformal orthogonal grids . In this letter, we present an application of a two-dimensional (2-D) hype rbolic grid generation scheme for a numerical implementation of conformal P ML in conjunction with Janaswamy and Liu's FDTD method. Numerical results s how that our hyperbolic grid-based conformal PML implementation provides an efficient absorbing boundary condition (ABC) for a body-conformal FDTD sim ulation involving complex geometries.