On the effect of total reflection on subgridded FDTD meshes

Author

Celuch-Marcysiak, Malgorzata ; Rudnicki, Janusz

Author_Institution

Inst. of Radioelectron., Warsaw Univ. of Technol., Poland

Volume

1

fYear

2004

fDate

20-25 June 2004

Firstpage

65

Abstract

A mathematical study of numerical reflections caused by several 2:1 and 3:1 spatially subgridded FDTD schemes is proposed. It provides rigorous justification for using odd subgridding ratios and collocated nodes. However, it also reveals that numerical reflections rapidly increase at large incidence angles and the effect of total reflection occurs, for example, in the analysis of waveguide circuits near cutoff. Mathematical predictions are confirmed by simulating sections of parallel-plate line and rectangular waveguide.

Keywords

electromagnetic wave reflection; finite difference time-domain analysis; mesh generation; parallel plate waveguides; rectangular waveguides; waveguide theory; collocated nodes; incidence angle; numerical reflections; odd subgridding ratios; parallel-plate line; rectangular waveguide; subgridded FDTD meshes; total reflection; waveguide circuits; Circuit analysis; Circuit simulation; Computational modeling; Equations; Finite difference methods; Interpolation; Predictive models; Rectangular waveguides; Reflection; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2004. IEEE

Print_ISBN

0-7803-8302-8

Type

conf

DOI

10.1109/APS.2004.1329554

Filename

1329554