Numerical dispersion improved four-step LOD-FDTD method

Abstract

In this paper, numerical dispersion improved four-step locally one-dimensional finite-difference time-domain (ILOD4-FDTD) method is proposed. The proposed method uses control parameters to reduce the numerical dispersion of the four-step LOD-FDTD (LOD4-FDTD) method. Performance of the proposed method with different time-steps and mesh-sizes is studied here, and it is found out that for every time-step and mesh-size, the proposed method gives less numerical dispersion than the LOD4-FDTD method.