Study of a parallel plate waveguide using computationally efficient explicit FDTD algorithm

This paper proposes a computationally efficient explicit finite difference time domain (FDTD) scheme for the TEz mode. In contrary to conventional FDTD method, we derive the finite difference of magnetic field using asymmetric approximation to the second order wave equation. The resultant implicit magnetic field equations are coupled in groups of two adjacent points of the computational domain to convert into explicit form. Mur´s 1^st order absorption boundary conditions are applied. Parallel plate waveguide is considered to evaluate the performance of our method. Numerical simulations demonstrate that our method is 1.393 times faster than conventional FDTD technique.