Broadband and compact double negative composite metamaterials with low losses

Article type: Research Article

Authors: Amiri, N.^a | Forooraghi, K.^{a; *} | Atlasbaf, Z.^a

Affiliations: [a] Electrical and Computer Department, Tarbiat Modares University, Tehran, Iran

Correspondence: [*] Corresponding author: K. Forooraghi, Microwave Lab., Electrical and Computer Department, Tarbiat Modares University, PO: 14115-11, Tehran, Iran. E-mail: keyvan_f@modares.ac.ir

Abstract: In this paper two novel left-handed composite metamaterials consisting of SRRs, wire and single sided S-shaped resonators are proposed. One of them is a reduced-size resonator which uses superposition hypothesis to achieve adjacent resonances for a much broader negative refraction passband. The other is a modified planar structure with improved electromagnetic coupling and reduced electrical size. Both structures are truly matched to free space in almost whole left-handed frequency band. It will be shown that these metamaterials are robust to the fabrication errors of misalignment printing on both sides of the substrate. The superior performance of these structures are investigated numerically and experimentally and compared with the other split ring resonators. Wedge shape simulation and experimental results confirm the left-handed passband.

Keywords: Metamaterial, double Negative, near zero index, left-handed material

DOI: 10.3233/JAE-131699

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 43, no. 3, pp. 271-281, 2013