Analyzing electromagnetic structures with curved boundaries on Cartesian FDTD meshes

Author

Hao, Yang ; Railton, Chris J.

Author_Institution

Centre for Commun. Res., Bristol Univ., UK

Volume

46

Issue

1

fYear

1998

fDate

1/1/1998 12:00:00 AM

Firstpage

82

Lastpage

88

Abstract

In this paper, a new finite-difference time-domain (FDTD) algorithm is investigated to analyze electromagnetic structures with curved boundaries using a Cartesian coordinate system. The new algorithm is based on a nonorthogonal FDTD method. However, only those cells near the curved boundaries are calculated by nonorthogonal FDTD formulas; most of the grid is orthogonal and can be determined by traditional FDTD formulas. Therefore, this new algorithm is more efficient than general nonorthogonal FDTD schemes in terms of computer resources such as memory and central processing unit (CPU) time. Simulation results are presented and compared to those using other methods

Keywords

electromagnetic wave scattering; finite difference time-domain analysis; waveguide theory; Cartesian FDTD meshes; Cartesian coordinate system; curved boundaries; electromagnetic analysis; electromagnetic structures; finite-difference time-domain algorithm; nonorthogonal FDTD method; Algorithm design and analysis; Central Processing Unit; Computational electromagnetics; Computational modeling; Electromagnetic analysis; Equations; Finite difference methods; Mesh generation; Resonant frequency; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.654926

Filename

654926