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Studies of permittivity and permeability of dielectric matrix with cuboid metallic inclusions in different orientations

Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom

School of Electronic, Electrical and Systems Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom

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W. G. Whittow

School of Electronic, Electrical and Systems Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom

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A. M. Zagoskin

Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom

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F. V. Kusmartsev

Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom

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, and

J. C. Vardaxoglou

School of Electronic, Electrical and Systems Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom

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https://doi.org/10.1142/S2010135X14500325Cited by:11 (Source: Crossref)

Abstract

In this paper, we investigate the possibility of using the heterogeneous materials, with cuboid metallic inclusions inside a dielectric substrate (host) to control the effective permittivity. We find that in the gigahertz range, such a material demonstrates a significantly larger permittivity compared to the pure dielectric substrate. Three principal orientations of microscale cuboid inclusions have been taken into account in this study. The highest permittivity is observed when the orientation provides the largest polarization (electric dipole moment). The detrimental side effect of the metallic inclusion, which leads to the decrease of the effective magnetic permeability, can be suppressed by the proper choice of shape and orientation of the inclusions. This choice can in fact reduce the induced current and hence maximize the permeability. The dissipative losses are shown to be negligible in the relevant range of frequencies and cuboid dimensions.

This is an Open Access article published by World Scientific Publishing Company. It is distributed under the terms of the Creative Commons Attribution 3.0 (CC-BY) License. Further distribution of this work is permitted, provided the original work is properly cited.

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