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

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Space Science Center (ANGKASA), Research Centre Building, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E. 43600, Malaysia
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Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, Bangi, Selangor D.E. 43600, Malaysia
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Department of Electrical Engineering, Faculty of Engineering, University of Malaya, Kuala Lumpur 50603, Malaysia
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Author to whom correspondence should be addressed.
Academic Editor: Jung Ho Je
Materials 2015, 8(1), 57-71; https://doi.org/10.3390/ma8010057
Received: 26 September 2014 / Accepted: 25 November 2014 / Published: 25 December 2014
(This article belongs to the Section Structure Analysis and Characterization)
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
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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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