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Multiple-Region Ray-Tracing: Comparison on Their Applicability for Human Exposure Evaluation

TitoloMultiple-Region Ray-Tracing: Comparison on Their Applicability for Human Exposure Evaluation
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2002
AutoriBernardi, P., Cavagnaro M., D'Atanasio Paolo, Di Palma E., Pisa S., and Piuzzi E.
RivistaInternational Journal of Numerical Modelling: Electronic Networks, Devices and Fields
Volume15
Paginazione579–593
Abstract

In this paper, the finite-difference time-domain ({FDTD}), multiple-region/{FDTD} ({MR/FDTD}) and ray-tracing/{FDTD} ({RT/FDTD}) techniques have been compared with reference to the study of the field scattered by and induced inside an exposed target. The three techniques have been validated on a free-space radiation problem through a comparison with the MoM solution. Compression techniques have been implemented to obtain a reduction of the computational costs associated with {MR/FDTD}, performing an accurate evaluation of the associated errors. The applicability and accuracy of the three techniques have then been tested studying the exposure of a sphere to a half-wavelength dipole. The obtained results have shown that the best computational performances are achieved employing {RT/FDTD}. However, this technique gives accurate results only in the radiative far-field of the antenna. {MR/FDTD}, instead, gives accurate predictions of field distributions for a wide range of distances between the scatterer and the antenna and, thanks to the introduction of compression techniques, requires acceptable computational costs. Pure {FDTD}, finally, is the most suitable technique, among the three considered, when the scatterer is close to the antenna but its computational costs become prohibitive for large-scale problems.

URLhttp://faraday.intranet.casaccia/Articoli scientifici/Campi elettromagnetici/Elettromagnetismo computazionale/FDTD/bernardi2002a.pdf
Citation KeyBernardiP2002