A study of numerical reflections caused by FDTD mesh refinements in 1D and 2D

Author

Celuch-Marcysiak, Matgorzata ; Rudnicki, Janusz

Author_Institution

Inst. Radioelektroniki, Politech. Warszawska, Warsaw, Poland

Volume

2

fYear

2004

fDate

17-19 May 2004

Firstpage

626

Abstract

A study of FDTD solutions on variable and subgridded meshes is presented. The effect of numerical reflections previously known from simulation practice is mathematically confirmed. It is shown that the magnitude of reflections can be accurately predicted by combining the numerical dispersion relations in the two mesh subregions, Snell´s law, and electric field continuity condition. The theory is validated for the 2D TE modes at normal and oblique incidence.

Keywords

electromagnetic wave reflection; finite difference time-domain analysis; mesh generation; microwave devices; microwave propagation; waveguide theory; 2D TE mode; FDTD mesh refinement; FDTD solution; Snell law; electric field continuity condition; mesh subregion; normal oblique incidence; numerical dispersion relation; numerical reflection; variable subgridded mesh; Dispersion; Finite difference methods; Interpolation; Microwave devices; Microwave theory and techniques; Polarization; Reflection; Spline; Tellurium; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwaves, Radar and Wireless Communications, 2004. MIKON-2004. 15th International Conference on

Print_ISBN

83-906662-7-8

Type

conf

DOI

10.1109/MIKON.2004.1357108

Filename

1357108