Realization of a spherical boundary by a layer of wave-guiding medium

I. V. Lindell; J. Markkanen; A. Sihvola; P. Ylä-Oijala

doi:10.1016/j.metmat.2011.05.002

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arXiv · 1104.3495

Realization of a spherical boundary by a layer of wave-guiding medium

I. V. Lindell·J. Markkanen·A. Sihvola·P. Ylä-Oijala

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Abstract

In this paper the concept of wave-guiding medium, previously introduced for planar structures, is defined for the spherically symmetric case. It is shown that a quarter-wavelength layer of such a medium serves as a transformer of boundary conditions between two spherical interfaces. As an application, the D'B'-boundary condition, requiring vanishing of normal derivatives of the normal components of D and B field vectors, is realized by transforming the DB-boundary conditions. To test the theory, scattering from a spherical DB object covered by a layer of wave-guiding material is compared to the corresponding scattering from an ideal D'B' sphere, for varying medium parameters of the layer.

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I. V. Lindell, J. Markkanen, A. Sihvola, P. Ylä-Oijala. 2011-04-18. Realization of a spherical boundary by a layer of wave-guiding medium. https://doi.org/10.1016/j.metmat.2011.05.002

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