2009, English, Article edition: Low-frequency dipolar excitation of a perfect ellipsoidal conductor Perrusson, Gaële; Vafeas, Panayiotis; Lesselier, Dominique

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Physical Description
  • text
Published
  • HAL - CCSD
  • 2009
Language
  • English

Edition details

Title
  • Low-frequency dipolar excitation of a perfect ellipsoidal conductor
Author
  • Perrusson, Gaële
  • Vafeas, Panayiotis
  • Lesselier, Dominique
Published
  • HAL - CCSD
  • 2009
Physical Description
  • text
Subjects
Notes
  • This paper deals with the scattering by a perfectly conductive ellipsoid under magnetic dipolar excitation at low frequency. The source and the ellipsoid are embedded in an infinite homogeneous conducting ground. The main idea is to obtain an analytical solution of this scattering problem in order to have a fast numerical estimation of the scattered field that can be useful for real data inversion. Maxwell equations and boundary conditions, describing the problem, are firstly expanded using low-frequency expansion of the fields up to order three. It will be shown that fields have to be found incrementally. The static one (term of order zero) satisfies the Laplace equation. The next non-zero term (term of order two) is more complicated and satisfies the Poisson equation. The order-three term is independent of the previous ones and is described by the Laplace equation. They constitute three different scattering problems that are solved using the separated variables method in the ellipsoidal coordinate system. Solutions are written as expansions on the few analytically known scalar ellipsoidal harmonics. Details are given to explain how those solutions are achieved with an example of numerical results.
  • HAL:hal-00406260, version 1
  • HAL:http:/​/​hal.archives-ouvertes.fr/​hal-00406260/​en/​
Language
  • English
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