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Materials 2015, 8(1), 57-71; doi:10.3390/ma8010057

A New Wide-Band Double-Negative Metamaterial for C- and S-Band Applications

1
Space Science Center (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E. 43600, Malaysia
2
Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E. 43600, Malaysia
3
Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
*
Author to whom correspondence should be addressed.
Academic Editor: Jung Ho Je
Received: 26 September 2014 / Accepted: 25 November 2014 / Published: 25 December 2014
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

A new design and analysis of a wide-band double-negative metamaterial, considering a frequency range of 0.5 to 7 GHz, is presented in this paper. Four different unit cells with varying design parameters are analyzed to evaluate the effects of the unit-cell size on the resonance frequencies of the metamaterial. Moreover, open and interconnected 2 × 2 array structures of unit cells are analyzed. The finite-difference time-domain (FDTD) method, based on the Computer Simulation Technology (CST) Microwave Studio, is utilized in the majority of this investigation. The experimental portion of the study was performed in a semi-anechoic chamber. Good agreement is observed between the simulated and measured S parameters of the developed unit cell and array. The designed unit cell exhibits negative permittivity and permeability simultaneously at S-band (2.95 GHz to 4.00 GHz) microwave frequencies. In addition, the designed unit cell can also operate as a double-negative medium throughout the C band (4.00 GHz to 4.95 GHz and 5.00 GHz to 5.57 GHz). At a number of other frequencies, it exhibits a single negative value. The two array configurations cause a slight shift in the resonance frequencies of the metamaterial and hence lead to a slight shift of the single- and double-negative frequency ranges of the metamaterial. View Full-Text
Keywords: C-band; finite-difference time-domain (FDTD) method; double-negative (DNG) metamaterial; metamaterial unit-cell; metamaterial array; S-band C-band; finite-difference time-domain (FDTD) method; double-negative (DNG) metamaterial; metamaterial unit-cell; metamaterial array; S-band
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Hossain, M.I.; Faruque, M.R.I.; Islam, M.T.; Ullah, M.H. A New Wide-Band Double-Negative Metamaterial for C- and S-Band Applications. Materials 2015, 8, 57-71.

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