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Effective parameters of a metamaterial composed of dielectric coated conducting cylindrical rods

Published online by Cambridge University Press:  19 February 2020

Z. A. Awan Open the ORCID record for Z. A. Awan [Opens in a new window] ,
Hassan Ullah ,
Ahsan Ullah  and
Afshan Ashraf
Z. A. Awan*
Affiliation:
Department of Electronics, Quaid-i-Azam University, Islamabad, Pakistan
Hassan Ullah
Affiliation:
Department of Electronics, Quaid-i-Azam University, Islamabad, Pakistan
Ahsan Ullah
Affiliation:
Department of Electronics, Quaid-i-Azam University, Islamabad, Pakistan
Afshan Ashraf
Affiliation:
Department of Electronics, Quaid-i-Azam University, Islamabad, Pakistan
*
Author for correspondence: Z. A. Awan [email protected]
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Abstract

In the first part, the scattering characteristics of an isolated dielectric coated conducting rod have been investigated. The types of considered coatings for the scattering analysis are realistic materials including barium strontium titanate, magnetodielectric, gallium arsenide, and silicon carbide. It is found that the gallium arsenide coating can be used to significantly reduce the scattering from a thin perfectly electric conducting cylindrical rod at specific observation angles. In the second part, the effective permittivity and permeability of metamaterials composed of two dimensional periodic arrangements of these dielectric coated conducting cylindrical rods have been studied. An increase in the double negative (DNG) bandwidth of a metamaterial composed of barium strontium titanate coated conducting rods has been observed in contrast to the corresponding bandwidth of a metamaterial composed of only barium strontium titanate material rods. Also an additional plasmonic epsilon negative (ENG) bandwidth has been found in case of a metamaterial composed of barium strontium titanate coated conducting rods. It is further studied that the widest ENG, mu negative, and DNG bandwidths exist for a metamaterial composed of gallium arsenide rods.

Keywords

Scatteringmetamaterialcylindrical rodeffective permittivityeffective permeability
Type
Metamaterials and Photonic Bandgap Structures
Information
International Journal of Microwave and Wireless Technologies , Volume 12 , Special Issue 8: Special Issue EuMW 2019. Part II , October 2020 , pp. 797 - 808
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Copyright
Copyright © Cambridge University Press and the European Microwave Association 2020

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