Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2004. IEEE
Print_ISBN :
0-7803-8302-8
DOI :
10.1109/APS.2004.1329554
