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Polarizability analysis of cubical and square-shaped dielectric scatterers

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4 Author(s)
Avelin, Juha ; Electromagn. Lab., Helsinki Univ. of Technol., Espoo, Finland ; Sharma, Reena ; Hanninen, I. ; Sihvola, A.H.

The polarizability characteristics of nonspherical scatterers, especially cubes and squares, are studied. A surface integral equation for the electrostatic potential has been numerically solved for a cube and a square-shaped object. Nonuniform gridding of the dielectric object has been used to get a good accuracy in the solution. The results obtained for the polarizability of cubes using the surface integral equation are compared with those obtained from the volume integral equation and show a good agreement. We give simple approximation formulas for the polarizabilities as functions of the permittivity of the inclusions. The results give an improvement compared to earlier literature and also present a way to predict the effective properties of mixtures where cube-shaped inclusions are embedded in dielectric environment, which type of mixtures strongly generalize the effective-medium theories of the present literature

Published in:

Antennas and Propagation, IEEE Transactions on  (Volume:49 ,  Issue: 3 )

Date of Publication:

Mar 2001

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