A novel Mu-negative metamaterial with broad bandwidth

作者：Song, Yi-Chuan^*; Ding, Jun; Guo, Chen-Jiang; Zhang, Jia-Kai; Ren, Yu-Hui; Qu, Yan

来源：Journal of Modern Optics, 2014, 61(20): 1656-1664.

DOI：10.1080/09500340.2014.948513

• fan-shaped structure
• parametric investigation
• Mu-negative metamaterial (MNG)
• electromagnetic response characteristic
• broadband characteristic

A novel polarization-independent Mu-negative metamaterial with broad bandwidth named fan-shaped structure, composed of periodically arranged capacity-loaded fan-shaped patches symmetrically printed on the both side of a FR4 substrate, is theoretically and numerically investigated in this paper. First, the effective constitutive parameters are retrieved from the computed scattering parameters and are found having a negative permeability characteristic in the frequency range of 6.86-9.46GHz, which is much wider than conventional split-ring resonator. Second, simplified equivalent LC models based on detailed study of field and surface current distribution, which can account for the characteristics of its electromagnetic behaviour, are introduced. Expressions of magnetic and electric resonance frequencies, deduced from the LC models, are presented as well. Finally, the dependence of the negative permeability characteristic on the system's geometrical parameters is analysed through a parametric investigation. This study offers a potentially simpler approach to building optimized left-handed metamaterials with a broad bandwidth.

• 出版日期2014-11-28
• 单位西北工业大学