• 文献标题:   Terahertz Graphene Based Metamaterial Transmitarray
  • 文献类型:   Article
  • 作  者:   ZAINUDDEEN SH, MABROUK AM, MALHAT H
  • 作者关键词:   graphene, metamaterial, transmitarray
  • 出版物名称:   WIRELESS PERSONAL COMMUNICATIONS
  • ISSN:   0929-6212 EI 1572-834X
  • 通讯作者地址:   Menoufia Univ
  • 被引频次:   3
  • DOI:   10.1007/s11277-018-5630-8
  • 出版年:   2018

▎ 摘  要

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 mu(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.