Numerical dispersion analysis for efficient 2-D Laguerre-based FDTD method

This paper presents the numerical dispersion analysis of the efficient two-dimensional Laguerre-based finite-difference time-domain (FDTD) method. The numerical dispersion relation is derived and the numerical dispersion errors are investigated. The results indicate that, by choosing the suitable values of the sampling point density in space domain and the time-scale factor, one can ensure the numerical dispersion error within certain accuracy.