An intuitive error analysis for FDTD and comparison to MoM

The accuracy of the Finite-Difference Time-Domain (FDTD) algorithm is commonly treated in two ways: a local analysis of the error in a finite-difference stencil, and the numerical dispersion relation for plane-wave propagation. This article presents a simple solution error estimate that connects these two approaches. This error estimate is nearly identical to a solution error estimate for the Method of Moments, except that the FDTD error includes an additional dependence on the electrical problem size