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

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 compar...

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Bibliographic Details
Published in:Journal of advanced dielectrics 2014-10, Vol.4 (4), p.1450032-1450032-8
Main Authors: Wu, W. M., Njoku, C. C., Whittow, W. G., Zagoskin, A. M., Kusmartsev, F. V., Vardaxoglou, J. C.
Format: Article
Language:English
Subjects:
antenna
cuboid
Dielectrics
Dipole moments
Electric dipoles
Inclusions
Magnetic permeability
Materials selection
orientation
Permeability
Permittivity
Substrates
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Summary: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.
ISSN:2010-135X
2010-1368
DOI:10.1142/S2010135X14500325