Finite-difference ground-penetrating radar modeling in frequency-dependent media
Détails
ID Serval
serval:BIB_F42EBA2DC8F8
Type
Actes de conférence (partie): contribution originale à la littérature scientifique, publiée à l'occasion de conférences scientifiques, dans un ouvrage de compte-rendu (proceedings), ou dans l'édition spéciale d'un journal reconnu (conference proceedings).
Collection
Publications
Institution
Titre
Finite-difference ground-penetrating radar modeling in frequency-dependent media
Titre de la conférence
EEGS - European section 3rd meeting, Aarhus, Denmark
Statut éditorial
Publié
Date de publication
1997
Pages
59-62
Langue
anglais
Résumé
Realistic modeling of electromagnetic wave propagation in the radar
frequency band requires a full solution of Maxwell's equations as
well as a complete description of the material properties. We present
a two-dimensional (2-D) flnite-difference time-domain solution of
Maxwell's equations that allows to account for the frequency dependence
of the dielectric permittivity and electrical conductivity typical
of many near-surface materials. In close analogy with the viscoacoustic
case, the governing equations are obtained by assuming dielectric
and conducting relaxation functions. The finite-difference solution
is second-order accurate in time and fourth-order accurate in space,
conditionally stable, and computationally only marginally more expensive
than its standard equivalent without frequency-dependent material
properties. The algorithm is applied to a realistic problem illustrating
the respective damping effects of conductivity and frequency-dependent
dielectricity.
frequency band requires a full solution of Maxwell's equations as
well as a complete description of the material properties. We present
a two-dimensional (2-D) flnite-difference time-domain solution of
Maxwell's equations that allows to account for the frequency dependence
of the dielectric permittivity and electrical conductivity typical
of many near-surface materials. In close analogy with the viscoacoustic
case, the governing equations are obtained by assuming dielectric
and conducting relaxation functions. The finite-difference solution
is second-order accurate in time and fourth-order accurate in space,
conditionally stable, and computationally only marginally more expensive
than its standard equivalent without frequency-dependent material
properties. The algorithm is applied to a realistic problem illustrating
the respective damping effects of conductivity and frequency-dependent
dielectricity.
Création de la notice
25/11/2013 19:27
Dernière modification de la notice
20/08/2019 17:21
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