Abstract
A novel finite-difference time-domain algorithm for modeling ultrawideband electromagnetic pulse propagation in arbitrary multirelaxed dispersive media is presented. The proposed scheme is based on a general, yet computationally efficient, series representation of the fractional derivative operators associated with the permittivity functions describing the frequency dispersion properties of a given dielectric material. Dedicated uniaxial perfectly matched layer boundary conditions are derived and implemented in combination with the basic time-marching scheme. Moreover, a total field/scattered field formulation is adopted in order to analyze the material response under plane-wave excitation. Compared with alternative numerical methodologies available in the scientific literature, the proposed technique features a significantly enhanced accuracy in the solution of complex electromagnetic propagation problems involving higher order dispersive dielectrics, such as the ones typically encountered in geoscience and bioengineering applications.
| Original language | English |
|---|---|
| Article number | 7486999 |
| Pages (from-to) | 3533-3544 |
| Number of pages | 12 |
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 64 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 1 Aug 2016 |
Fingerprint
Keywords
- Dielectric relaxation
- dispersive media
- enhanced weighted quantum particle swarm optimization (EWQPSO)
- finite-difference time domain (FDTD)
- fractional calculus
ASJC Scopus subject areas
- Condensed Matter Physics
- Electrical and Electronic Engineering
Cite this
Fractional-Calculus-Based FDTD Algorithm for Ultrawideband Electromagnetic Characterization of Arbitrary Dispersive Dielectric Materials. / Caratelli, Diego; Mescia, Luciano; Bia, Pietro; Stukach, Oleg V.
In: IEEE Transactions on Antennas and Propagation, Vol. 64, No. 8, 7486999, 01.08.2016, p. 3533-3544.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Fractional-Calculus-Based FDTD Algorithm for Ultrawideband Electromagnetic Characterization of Arbitrary Dispersive Dielectric Materials
AU - Caratelli, Diego
AU - Mescia, Luciano
AU - Bia, Pietro
AU - Stukach, Oleg V.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - A novel finite-difference time-domain algorithm for modeling ultrawideband electromagnetic pulse propagation in arbitrary multirelaxed dispersive media is presented. The proposed scheme is based on a general, yet computationally efficient, series representation of the fractional derivative operators associated with the permittivity functions describing the frequency dispersion properties of a given dielectric material. Dedicated uniaxial perfectly matched layer boundary conditions are derived and implemented in combination with the basic time-marching scheme. Moreover, a total field/scattered field formulation is adopted in order to analyze the material response under plane-wave excitation. Compared with alternative numerical methodologies available in the scientific literature, the proposed technique features a significantly enhanced accuracy in the solution of complex electromagnetic propagation problems involving higher order dispersive dielectrics, such as the ones typically encountered in geoscience and bioengineering applications.
AB - A novel finite-difference time-domain algorithm for modeling ultrawideband electromagnetic pulse propagation in arbitrary multirelaxed dispersive media is presented. The proposed scheme is based on a general, yet computationally efficient, series representation of the fractional derivative operators associated with the permittivity functions describing the frequency dispersion properties of a given dielectric material. Dedicated uniaxial perfectly matched layer boundary conditions are derived and implemented in combination with the basic time-marching scheme. Moreover, a total field/scattered field formulation is adopted in order to analyze the material response under plane-wave excitation. Compared with alternative numerical methodologies available in the scientific literature, the proposed technique features a significantly enhanced accuracy in the solution of complex electromagnetic propagation problems involving higher order dispersive dielectrics, such as the ones typically encountered in geoscience and bioengineering applications.
KW - Dielectric relaxation
KW - dispersive media
KW - enhanced weighted quantum particle swarm optimization (EWQPSO)
KW - finite-difference time domain (FDTD)
KW - fractional calculus
UR - http://www.scopus.com/inward/record.url?scp=84981266393&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84981266393&partnerID=8YFLogxK
U2 - 10.1109/TAP.2016.2578322
DO - 10.1109/TAP.2016.2578322
M3 - Article
VL - 64
SP - 3533
EP - 3544
JO - IEEE Transactions on Antennas and Propagation
JF - IEEE Transactions on Antennas and Propagation
SN - 0018-926X
IS - 8
M1 - 7486999
ER -