Frequency-Reconfigurable Antenna Using Metasurface
Frequency-Reconfigurable Antenna Using Metasurface
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DOI：
10.1109/tap.2013.2288112
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发表时间：
2014
影响因子：
5.7
通讯作者：
Hailiang Zhu;Xianghua Liu;S. Cheung;T. I. Yuk
中科院分区：
文献类型：
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作者：
Hailiang Zhu;Xianghua Liu;S. Cheung;T. I. Yuk
提出并研究了一种基于超颖表面（MS）的频率可重构天线，该天线工作在5 GHz左右。频率可重构超表面（FRMS）天线由一个简单的圆形贴片天线和一个直径为40 mm（0.67 λ）的圆形MS组成，采用平面技术实现。MS直接放置在贴片天线的顶部，使FRMS天线非常紧凑和低剖面，厚度仅为3.048 mm（0.05 λ）。MS由在垂直和水平方向上周期性地放置的矩形回路单位单元组成。仿真结果表明，天线的工作频率可以调谐通过物理旋转的MS相对于贴片天线的中心。放置在贴片天线顶部的MS表现得像介电基板，并且旋转MS改变基板的等效相对介电常数，从而改变FRMS天线的工作频率。测量结果表明，该天线的调谐范围为4.76 ~ 5.51GHz，分数调谐范围为14.6%，辐射效率大于80%，实现峰值增益大于5dBi。
A frequency-reconfigurable antenna designed using metasurface (MS) to operate at around 5 GHz is proposed and studied. The frequency-reconfigurable metasurfaced (FRMS) antenna is composed of a simple circular patch antenna and a circular MS with the same diameter of 40 mm (0.67 λ) and implemented using planar technology. The MS is placed directly atop the patch antenna, making the FRMS antenna very compact and low profile with a thickness of only 3.048 mm (0.05 λ). The MS consists of rectangular-loop unit cells placed periodically in the vertical and horizontal directions. Simulation results show that the operating frequency of the antenna can be tuned by physically rotating the MS around the center with respect to the patch antenna. The MS placed atop the patch antenna behaves like a dielectric substrate and rotating the MS changes the equivalent relative permittivity of the substrate and hence the operating frequency of the FRMS antenna. Measured results show that the antenna has a tuning range from 4.76 to 5.51 GHz, a fractional tuning range of 14.6%, radiation efficiency and a realized peak gain of more than 80% and 5 dBi, respectively, across the tuning range.