Subcell FDTD modeling of electrically thin dispersive layers

Author

Kärkkäinen, Mikko K.

Author_Institution

Radio Lab., Helsinki Univ. of Technol., Finland

Volume

51

Issue

6

fYear

2003

fDate

6/1/2003 12:00:00 AM

Firstpage

1774

Lastpage

1780

Abstract

A novel technique for treating electrically thin dispersive layers with the finite-difference time-domain (FDTD) method is introduced. The proposed model is based on the subcell technique, where the constitutive relations are locally averaged in the FDTD grid. The most significant feature of the proposed model is its ability to model rather complicated dispersive layers having multiple pole pairs. The model is validated with several numerical examples making comparison with the exact results. Both time- and frequency-domain validations are presented.

Keywords

dispersion (wave); electromagnetic wave reflection; finite difference time-domain analysis; rectangular waveguides; waveguide theory; FDTD grid; TE-polarized pulse reflection; complicated dispersive layers; conductive layers; dielectric layers; electrically thin dispersive layers; frequency-domain validations; microwave devices; model; multiple pole pairs; numerical examples; rectangular waveguide; reflection coefficient; subcell FDTD modeling; time-domain validations; Boundary conditions; Dielectrics; Dispersion; Equations; Finite difference methods; Lattices; Microwave devices; Numerical models; Surface impedance; Time domain analysis;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/TMTT.2003.812584

Filename

1201813