A hybrid ADI-FDTD scheme and its comparisons with the FDTD method

Author

Zhizhang Chen ; Ahmed, I.

Author_Institution

Dept. of Electr. & Comput. Eng., Dalhousie Univ., Halifax, NS, Canada

Volume

4

fYear

2003

fDate

22-27 June 2003

Firstpage

360

Abstract

In this paper a technique that hybrid FDTD and ADI-FDTD methods for a locally graded mesh is proposed for efficient numerical modeling of RF/microwave structures. In it, the conventional FDTD grid is applied in the coarse mesh region, while the ADI-FDTD is used in the locally dense region. In comparisons with the conventional FDTD, the hybrid method results in the reduction of CPU time due to the unconditional stability of the ADI-FDTD and the minimum memory requirement because of the fewer components with the conventional FDTD algorithm. Numerical examples are given for validation.

Keywords

computational electromagnetics; finite difference time-domain analysis; interpolation; numerical stability; alternating direction implicit FDTD algorithm; finned waveguide; hybrid technique; interpolation; locally graded mesh; minimum memory requirement; stability conditions; unconditionally stable method; Costs; Equations; Finite difference methods; Interpolation; Numerical models; Senior members; Stability; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2003. IEEE

Conference_Location

Columbus, OH, USA

Print_ISBN

0-7803-7846-6

Type

conf

DOI

10.1109/APS.2003.1220194

Filename

1220194