TITLE:
An Efficient Method to Reduce the Numerical Dispersion in the HIE-FDTD Scheme
AUTHORS:
Juan Chen, Anxue Zhang
KEYWORDS:
HIE-FDTD, Numerical Dispersion, Weakly Conditionally Stability
JOURNAL NAME:
Wireless Engineering and Technology,
Vol.2 No.1,
January
30,
2011
ABSTRACT: A parameter optimized approach for reducing the numerical dispersion of the 3-D hybrid implicit-explicit finite-difference time-domain (HIE-FDTD) is presented in this letter. By adding a parameter into the HIE-FDTD formulas, the error of the numerical phase velocity can be controlled, causing the numerical dispersion to decrease significantly. The numerical stability and dispersion relation are presented analytically, and numerical experiments are given to substantiate the proposed method.