A new subgridding method for the finite-difference time-domain (FDTD) algorithm

In this paper, the authors present a general subgridding scheme for enhanci ng the finite-difference time-domain (FDTD) algorithm. It is different from the conventional approaches in that it does not employ weighed averages of the electric or magnetic fields in the transition region from the coarse t o the fine region, but instead employs a novel procedure for transferring t he information between the two regions. We illustrate the application of th e subgridding algorithm by considering a refinement factor of 5, and provid e validation of the results obtained. (C) 1999 John Wiley & Sons, Inc.