Terahertz Graphene Based Metamaterial Transmitarray

This paper introduces a graphene metamaterial (GMM) transmitarray designed for terahertz applications. The unit-cell element is a multilayered metamaterial structure of a graphene split ring resonator with two variable gaps. The metamaterial properties of the unit-cell element are investigated from...

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Bibliographic Details
Published in:Wireless personal communications 2018-06, Vol.100 (3), p.1235-1248
Main Authors: Zainud-Deen, Saber Helmy, Mabrouk, Ahmed M., Malhat, Hend Abd El-Azem
Format: Article
Language:English
Subjects:
Communications Engineering
Computer Communication Networks
Engineering
Graphene
High gain
Metamaterials
Networks
Signal,Image and Speech Processing
Unit cell
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Summary:This paper introduces a graphene metamaterial (GMM) transmitarray designed for terahertz applications. The unit-cell element is a multilayered metamaterial structure of a graphene split ring resonator with two variable gaps. The metamaterial properties of the unit-cell element are investigated from 0.74 to 0.94 THz for different conductivities of the graphene material. A parametric study of the transmission properties of the metamaterial unit-cell element is investigated. The radiation characteristics of 169 unit-cell elements of the three layers GMM transmitarrays are analyzed for different applied DC voltages. The gain and side-lobe level of the proposed transmitarray are improved by using an averaging process on the transmission phase used for array construction. The transmitarray introduces a high gain of about 18.5 dB at frequencies 0.83, 0.85 and 0.88 THz for chemical potentials μ c  = 0.4, 0.5 and 0.8 eV, respectively. A full wave simulation is used to design and analyze the radiation characteristics of the graphene based metamaterial transmitarray.
ISSN:0929-6212
1572-834X
DOI:10.1007/s11277-018-5630-8