Compact and broadband antenna based on a step-shaped metasurface.
Compact and broadband antenna based on a step-shaped metasurface.
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DOI：
10.1364/oe.25.019023
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发表时间：
2017-08
期刊：
影响因子：
3.8
通讯作者：
Ximing Li;Jingjing Yang;Yun Feng;M. Yang;Ming Huang
中科院分区：
文献类型：
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作者：
Ximing Li;Jingjing Yang;Yun Feng;M. Yang;Ming Huang
超表面（MS）由于其固有的和独特的电磁特性而对于提高贴片天线的性能和减小其尺寸非常有用。在本文中，一个紧凑的和宽带的工作频率为4.3 GHz的阶梯形超颖表面（SMS）的基础上，这是由一个平面的天线馈电，并通过选择具有高选择性的SMS启用。SMS由位于MEMS下方的金属阶梯形单元电池阵列组成，可提供占地面积小型化和带宽扩展。数值计算结果表明，最大尺寸为0.42λ02（λ0为自由空间工作波长）的SMS天线具有22.3%的阻抗带宽（S11 < -10 dB）和大于7.15 dBi的通带增益。微波频率下的实验结果验证了所提出的天线的性能，表现出与仿真结果基本一致。因此，紧凑和宽带天线预测在现代无线通信系统中的许多潜在应用。
A metasurface (MS) is highly useful for improving the performance of patch antennae and reducing their size due to their inherent and unique electromagnetic properties. In this paper, a compact and broadband antenna based on a step-shaped metasurface (SMS) at an operating frequency of 4.3 GHz is presented, which is fed by a planar monopole and enabled by selecting an SMS with high selectivity. The SMS consists of an array of metallic step-shaped unit cells underneath the monopole, which provide footprint miniaturization and bandwidth expansion. Numerical results show that the SMS-based antenna with a maximum size of 0.42λ02 (where λ0 is the operating wavelength in free space) exhibits a 22.3% impedance bandwidth (S11 < -10 dB) and a high gain of more than 7.15 dBi within the passband. Experimental results at microwave frequencies verify the performance of the proposed antenna, demonstrating substantial consistency with the simulation results. The compact and broadband antenna therefore predicts numerous potential applications within modern wireless communication systems.