The Finite Difference Frequency Domain Technique

Like the finite difference time domain method, the finite difference frequency domain (FDFD) method is based on a finite differential approximation of the derivative operators in the Maxwell curl equations. However, in FDFD, the time-harmonic version of these equations is employed. While time-domain finite difference schemes are very popular, the finite difference frequency domain method has received little attention in the literature. It is essentially similar to the finite element method, but it requires a uniform grid.