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Materials 2016, 9(10), 830;

A New Compact Double-Negative Miniaturized Metamaterial for Wideband Operation

Space Science Center (ANGKASA), Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
Department of Electrical, Electronic and Systems Engineering, Universiti Kebangsan Malaysia, 43600 UKM, Bangi, Selangor, Malaysia
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 1 September 2016 / Revised: 24 September 2016 / Accepted: 28 September 2016 / Published: 13 October 2016
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The aim of this paper is to introduce a compact double-negative (DNG) metamaterial that exhibits a negative refractive index (NRI) bandwidth of more than 3.6 GHz considering the frequency from 2 to 14 GHz. In this framework, two arms of the designed unit cell are split in a way that forms a Modified-Z-shape structure of the FR-4 substrate material. The finite integration technique (FIT)-based Computer Simulation Technology (CST) Microwave Studio is applied for computation, and the experimental setup for measuring the performance is performed inside two waveguide ports. Therefore, the measured data complies well with the simulated data of the unit cell at 0-degree and 90-degree rotation angles. The designed unit cell shows a negative refractive index from 3.482 to 7.096 GHz (bandwidth of 3.61 GHz), 7.876 to 10.047 GHz (bandwidth of 2.171 GHz), and 11.594 to 14 GHz (bandwidth of 2.406 GHz) in the microwave spectra. The design also exhibits almost the same wide negative refractive index bandwidth in the major region of the C-band and X-band if it is rotated 90 degrees. However, the novelty of the proposed structure lies in its effective medium ratio of more than 4, wide bandwidth, and compact size. View Full-Text
Keywords: dual band; double-negative metamaterial; effective medium ratio; wide bandwidth dual band; double-negative metamaterial; effective medium ratio; wide bandwidth

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Hasan, M.M.; Faruque, M.R.I.; Islam, S.S.; Islam, M.T. A New Compact Double-Negative Miniaturized Metamaterial for Wideband Operation. Materials 2016, 9, 830.

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