Abstract

Finite-difference time-domain discrete plane wave technique (FDTD-DPW) is a numerical method which by using total the field/scattered field scheme allows one to propagate a plane wave quasi-perfectly isolated. This means a propagation in the total field domain without reflexions to the scattered field domain on the order of machine precision (−300 dB). This technique is valid for any angle of propagation, and for any gridcell aspect ratio. In this work, we extend this numerical illumination procedure for uniform three-dimensional grids to domains that are meshed by a non-uniform grid. To do so, we introduce some modifications to the original FDTD-DPW technique.