The influence of boundary conditions on resonant frequencies of cavities in 3-D FDTD algorithm using non-orthogonal co-ordinates

Author

Zhao, Li ; Tong, Lin S. ; Carter, Richard G.

Author_Institution

Res. Inst. of Electron., Southeast Univ., Nanjing, China

Volume

30

Issue

5

fYear

1994

fDate

9/1/1994 12:00:00 AM

Firstpage

3570

Lastpage

3573

Abstract

The 3-dimensional finite-difference time-domain method in non-orthogonal co-ordinates (non-standard FDTD) is used to calculate the frequencies of resonators. The numerical boundary conditions of the method are presented. The influences of boundary conditions and discrete meshes on the numerical accuracy are investigated. We present the nonstandard FDTD method using the boundary-orthogonal mesh and equivalent dielectric constant so that the error is reduced from 8.6% to 3.0% for the cylindrical cavity loaded by a dielectric button

Keywords

cavity resonators; finite difference time-domain analysis; 3-D FDTD algorithm; 3-dimensional finite-difference time-domain method; boundary conditions; boundary-orthogonal mesh; cavities; cylindrical cavity; dielectric button loading; discrete meshes; equivalent dielectric constant; error; nonorthogonal co-ordinates; nonstandard FDTD method; numerical accuracy; resonant frequencies; Boundary conditions; Dielectric constant; Electromagnetic fields; Equations; Filters; Finite difference methods; Magnetic fields; Resonance; Resonant frequency; Time domain analysis;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.312710

Filename

312710