Accurate modeling of dispersive material interfaces in high-order finite-difference methods

Author

Armenta, Roberto B. ; Sarris, Costas D.

Author_Institution

Edward S. Rogers Sr. Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON, Canada

fYear

2011

fDate

5-10 June 2011

Firstpage

1

Lastpage

4

Abstract

When solving Maxwell´s equations using high-order finite-difference methods in the presence of dispersion, it is particularly important to have an appropriate procedure to model material interfaces that can handle nonuniform grids. This paper shows that, if such procedure is in place, then is possible to achieve high-order convergence using coarse discretizations even in the extreme case of analyzing a Lorentz material interfaced with vacuum and excited at its plasma frequency.

Keywords

Maxwell equations; coaxial cables; convergence of numerical methods; dielectric materials; dispersive media; finite difference methods; Lorentz material; Maxwell equation; coarse discretization; dispersive material interface modeling; high-order finite difference method; plasma frequency; transmission line discontinuities; Dispersion; Finite difference methods; Materials; Mathematical model; Maxwell equations; Power transmission lines; Time domain analysis; evanescent waves; finite-difference methods; transmission-line discontinuities; transmission-line modeling;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest (MTT), 2011 IEEE MTT-S International

Conference_Location

Baltimore, MD

ISSN

0149-645X

Print_ISBN

978-1-61284-754-2

Electronic_ISBN

0149-645X

Type

conf

DOI

10.1109/MWSYM.2011.5972806

Filename

5972806