A new wide-band double-negative metamaterial for C- and S-band applications
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 me...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
MDPI AG, POSTFACH, CH-4005 BASEL, SWITZERLAND
2015
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| Subjects: | |
| Online Access: | http://eprints.um.edu.my/13870/1/A_New_Wide-Band_Double-Negative_Metamaterial_for_C.pdf http://eprints.um.edu.my/13870/ http://www.mdpi.com/1996-1944/8/1/57/htm |
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| Summary: | 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 x 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. |
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