Title :
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
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;
Conference_Titel :
Antennas and Propagation Society International Symposium, 1996. AP-S. Digest
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
0-7803-3216-4
DOI :
10.1109/APS.1996.549918
