Numerical assessment of the combination of subgridding and the perfectly matched layer grid termination in the finite difference time domain method

Abstract

The finite-difference time-domain FDTD method is one of the well-established numerical techniques to model electromagnetic problems. In order to be able to efficiently include the finer geometrical details, subgridding is used to avoid the use of a fine mesh over the whole region of interest. Our work builds on and extends the systematic framework provided by Chilton in his PhD H-refinement, P-refinement, and T-refinement strategies for the FDTD method developed via finite element principles, Ohio State University, 2008.