Calculation of dispersion errors for the piecewise linear recursive convolution method

Author

Kelley, D.F. ; Luebbers, R.J.

Author_Institution

Pennsylvania State Univ., University Park, PA, USA

Volume

3

fYear

1996

fDate

21-26 July 1996

Firstpage

1652

Abstract

Young et al. (1995) introduced a simple procedure for calculating the dispersion errors inherent in several techniques for modeling frequency-dependent media in the finite difference time domain (FDTD) method. The authors present closed-form expressions for the numerical permittivity, the apparent permittivity of the medium due to numerical grid dispersion. The numerical permittivity is then used to compute the dispersion. Here, the dispersion analysis technique of Young et al. is applied to the new piecewise linear recursive convolution (PLRC) method of Kelley and Luebbers.

Keywords

convolution; dispersion (wave); electromagnetic wave propagation; error analysis; finite difference time-domain analysis; permittivity; piecewise-linear techniques; waveguide theory; apparent permittivity; closed-form expressions; dispersion errors; finite difference time domain method; frequency-dependent media; numerical grid dispersion; numerical permittivity; piecewise linear recursive convolution method; Attenuation; Closed-form solution; Convolution; Equations; Error correction; Finite difference methods; Frequency; Permittivity; Piecewise linear techniques; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 1996. AP-S. Digest

Conference_Location

Baltimore, MD, USA

Print_ISBN

0-7803-3216-4

Type

conf

DOI

10.1109/APS.1996.549918

Filename

549918