Impedance boundary condition simulation in the FDTD/FVTD hybrid

Author

Yee, Kane S. ; Chen, Jei S.

Author_Institution

Lockheed Palo Alto Res. Lab., CA, USA

Volume

45

Issue

6

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

921

Lastpage

925

Abstract

The simulation of the impedance boundary condition (IBC) for the finite-difference time-domain (FDTD) and the finite-volume time domain (FVTD) hybrid algorithm with overlapping grids is explained in detail. This paper does not discuss the validity of the IBC model, and our model assumes the surface impedance or surface admittance has a constant resistive part and a nonnegative imaginary part, which is a linear function of frequency. This model is restrictive. But, with this assumption, the use of a convolution integral is avoided and for many applications this is sufficient. Comparisons of the calculations, based on our time-domain algorithm with the Mie series solutions and the method of moment (MoM) solutions, are given. The agreement between our solutions and the referenced solutions shows that our IBC simulation gives credible numerical results

Keywords

digital simulation; electric impedance; electromagnetic field theory; finite difference time-domain analysis; simulation; EM fields; FDTD/FVTD hybrid; Mie series solutions; MoM solution; constant resistive part; finite difference time domain; finite volume time domain; frequency; impedance boundary condition simulation; linear function; method of moment solution; nonnegative imaginary part; sphere; surface admittance; surface impedance; time-domain algorithm; Admittance; Boundary conditions; Convolution; Electromagnetic scattering; Finite difference methods; Frequency dependence; Moment methods; Numerical simulation; Surface impedance; Time domain analysis;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/8.585738

Filename

585738