Approximate Numerical Reflection Coefficient of Isotropic-Dispersion Finite-Difference Time-Domain(ID-FDTD) Scheme at the Planar Dielectric Interface for the TM Wave

Deng, Pingping; Koh, Il-Suek

doi:2010.10.2.45

J. Electromagn. Eng. Sci > Volume 10(2); 2010 > Article

Journal of the Korean Institute of Electromagnetic and Science 2010;10(2):45-49.
DOI: https://doi.org/10.5515/JKIEES.2010.10.2.045

Approximate Numerical Reflection Coefficient of Isotropic-Dispersion Finite-Difference Time-Domain(ID-FDTD) Scheme at the Planar Dielectric Interface for the TM Wave

Pingping Deng, Il-Suek Koh

Graduate School of Information and Communication, Inha University

Abstract

This paper presents an analytical formulation of the numerical reflection coefficient of the ID-FDTD scheme at the planar dielectric boundary for a TM wave incidence. The reflection coefficient is formulated in an approximate manner, and the accuracy of this method is numerically verified. The effective dielectric constant for a grid on the interface is obtained, and then reduced to that of the Yee scheme for a small cell size.

Key words: ID-FDTD Scheme, Reflection Coefficient, Effective Dielectric Constant