A modified 3D fourth order FDTD algorithm M3d/sub 24/ for improving phase accuracy with low resolution

Abstract

A second order in time-fourth order in space modified finite difference time domain algorithm for 3D electromagnetic problems is presented. The algorithm enables the numerical phase error to be minimized, so that it leads to high accuracy with low resolution grids. Good results for long distance propagation in the case of radiation from time harmonic elementary dipole show the advantage of this method with low resolution compared to the previous finite difference time domain methods.