Title :
An efficient method to reduce the numerical dispersion in the ADI-FDTD
Author :
Zheng, Hong-Xing ; Leung, Kwok Wa
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
fDate :
7/1/2005 12:00:00 AM
Abstract :
A new approach to reduce the numerical dispersion in the finite-difference time-domain (FDTD) method with alternating-direction implicit (ADI) is studied. By adding anisotropic parameters into the ADI-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 discussed in this paper. Numerical experiments are given to substantiate the proposed method.
Keywords :
Maxwell equations; computational electromagnetics; dispersion relations; finite difference time-domain analysis; numerical stability; ADI-FDTD; alternating-direction implicit; dispersion relation; finite-difference time-domain method; numerical dispersion; numerical phase velocity error; numerical stability; Anisotropic magnetoresistance; Dispersion; Error correction; Finite difference methods; Helium; Maxwell equations; Numerical stability; Time domain analysis; Two dimensional displays; Velocity control; Alternate-direction-implicit (ADI) method; artificial anisotropic parameters; finite-difference time-domain (FDTD) technique; numerical dispersion; phase velocity error;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2005.850441
