An efficient implementation of low order surface impedance boundary conditions (SIBCs) for the finite-difference time-domain (FDTD) method is presented. The surface impedance function of a lossy medium is approximated with a series of first-order rational functions by using the vector fitting (VF) technique. Thus, the resulting time-domain convolution integrals are efficiently computed using recursive formulas. The numerical error of the surface impedance modeled by the FDTD method is carried out analytically. A sensitivity analysis is performed to determine the minimum number of poles required by the VF technique to achieve good accuracy in modeling regions bounded by several lossy media with near-or far-field source excitations.

De Santis, V., Cruciani, S., Feliziani, M., Okoniewski, M. (2012). Efficient low order approximation for surface impedance boundary conditions in finite-difference time-domain method. IEEE TRANSACTIONS ON MAGNETICS, 48(2), 271-274 [10.1109/TMAG.2011.2172397].

Efficient low order approximation for surface impedance boundary conditions in finite-difference time-domain method

Cruciani S.;
2012-01-01

Abstract

An efficient implementation of low order surface impedance boundary conditions (SIBCs) for the finite-difference time-domain (FDTD) method is presented. The surface impedance function of a lossy medium is approximated with a series of first-order rational functions by using the vector fitting (VF) technique. Thus, the resulting time-domain convolution integrals are efficiently computed using recursive formulas. The numerical error of the surface impedance modeled by the FDTD method is carried out analytically. A sensitivity analysis is performed to determine the minimum number of poles required by the VF technique to achieve good accuracy in modeling regions bounded by several lossy media with near-or far-field source excitations.
2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore ING-IND/31 - ELETTROTECNICA
English
Con Impact Factor ISI
Finite difference methods
finite-difference time-domain (FDTD)
surface impedance boundary condition (SIBC)
vector fitting (VF)
De Santis, V., Cruciani, S., Feliziani, M., Okoniewski, M. (2012). Efficient low order approximation for surface impedance boundary conditions in finite-difference time-domain method. IEEE TRANSACTIONS ON MAGNETICS, 48(2), 271-274 [10.1109/TMAG.2011.2172397].
De Santis, V; Cruciani, S; Feliziani, M; Okoniewski, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/325103
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