A finite-difference time-domain algorithm optimized for arbitrary propagation angles

Author

Wang, Shumin ; Teixeira, Fernando L.

Author_Institution

Dept. of Electr. Eng., Ohio State Univ., Columbus, OH, USA

Volume

51

Issue

9

fYear

2003

fDate

9/1/2003 12:00:00 AM

Firstpage

2456

Lastpage

2463

Abstract

We present a two-dimensional higher order FDTD algorithm to minimize the numerical dispersion error at arbitrary, preassigned angles. Filtering schemes are further employed to optimize the FDTD frequency response at a given frequency range. A stability analysis of the resulting FDTD algorithms is included. Numerical dispersion properties are compared against Yee´s scheme and a higher order (2,4) FDTD scheme. Numerical results demonstrate that the dispersion error around a preassigned angle (and, with filtering, around a frequency band of choice) can be significantly reduced.

Keywords

dispersion (wave); electromagnetic wave propagation; finite difference time-domain analysis; frequency response; minimisation; numerical stability; (2,4) FDTD scheme; arbitrary preassigned angles; arbitrary propagation angles; filtering schemes; finite-difference time-domain algorithm; frequency response; higher order FDTD algorithm; numerical dispersion error minimization; optimization; stability analysis; Computational efficiency; Equations; Error correction; Filtering; Finite difference methods; Frequency response; Optimization methods; Stability analysis; Time domain analysis; Two dimensional displays;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2003.816642

Filename

1229915