Microwave response of octagon-shaped parallel plates: Low-loss metamaterial

SABAH C.

OPTICS COMMUNICATIONS, vol.285, no.21-22, pp.4549-4552, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 285 Issue: 21-22
  • Publication Date: 2012
  • Doi Number: 10.1016/j.optcom.2012.06.043
  • Journal Name: OPTICS COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4549-4552
  • Keywords: Metamaterial, Fishnet, Parallel plates, Negative refraction, Single and double negative, Microwave, NEGATIVE-INDEX METAMATERIAL, REFRACTIVE-INDEX, PARAMETERS
  • Middle East Technical University Northern Cyprus Campus Affiliated: Yes

Abstract

A very low-loss metamaterial formed by a pair of homogeneous octagon-shaped parallel plates separated by a dielectric substrate is presented to achieve simultaneous negative permittivity and permeability in the microwave region. The double-negative behavior with a high figure of merit (FOM=vertical bar Re(n)/Im(n)vertical bar =80 at 24.7 GHz) leads to reduced losses in this proposed metamaterial. The high quality feature of the structure can make the applications of the negative refractive index metamaterial more efficient and applicable, such as perfect- or super-lenses at microwave frequencies since FOM approximate to 64.5, where the real part of the refractive index approximate to - 1 at 25.3 GHz. (C) 2012 Elsevier B.V. All rights reserved.