Author/Authors :
Zarifi، D. نويسنده the Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran. , , Hosseininejad، S. E. نويسنده Department of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran. , , Abdolali، A. نويسنده Ph.D. Candidate, Department of Civil and Environmental Engineering, University of Roma Tre. Abdolali, A.
Abstract :
A dual-band artificial magnetic material and then a dual-band double-negative
metamaterial structure based on symmetric spiral resonators are presented. An approximate
analytical model is used for the initial design of the proposed structures. The
electromagnetic parameters of the proposed metamaterial structure retrieved using an
advanced parameter retrieval method based on the causality principle show its dual-band
nature at microwave frequencies. The proposed double negative metamaterial structure with
unit cells with transverse dimensions of 2.5 mm × 2.5 mm has two negative refractive index
regions around 6 GHz and 8 GHz. The designed structure can be scaled to other frequencies
and is also suitable for planar fabrication
