Issue Eur. Phys. J. Appl. Phys. Volume 46, Number 3, June 2009 Metamaterials Article Number 32604 Number of page(s) 4 Section Metamaterials 2007 DOI 10.1051/epjap/2009022 Published online 10 March 2009

Eur. Phys. J. Appl. Phys. 46, 32604 (2009)
DOI: 10.1051/epjap/2009022

Effective parameters of metal-dielectric composites: influence of eddy currents due to density fluctuations

A.P. Vinogradov¹, N. Burokur² and S. Zouhdi<sup>2

1</sup>  Institute of Theoretical and Applied Electromagnetism (ITAE), Russian Academy of Sciences, Izhorskaya 13/19, 127412 Moscow, Russia
²  Laboratoire de Génie Électrique de Paris, Plateau de Moulon, 91192 Gif-Sur-Yvette Cedex, France

said.zouhdi@u-psud.fr

Received: 16 April 2008 / Received in final form: 1st December 2008 / Accepted: 5 January 2009 / Published online: 10 March 2009

Abstract
It is shown that the space fluctuations of concentration of conducting inclusions might be responsible for the well-known disagreement between theory and experiment at determining microwave losses in metal-dielectric mixture: the theories (percolation theory, effective medium theory, etc.) predict much lower losses than those measured in experiment. It is demonstrated that if the effective skin depth in the regions occupied by the fluctuation is comparable to the mean diameter of these regions we can expect additional losses.

PACS
72.80.Tm - Composite materials.
73.43.Cd - Theory and modeling.

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