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A Low-Profile Wideband Metasurface Antenna With Fan-Beam Radiation
IEEE Open Journal of Antennas and Propagation Pub Date : 2022-06-29 , DOI: 10.1109/ojap.2022.3187378
Xue Ren 1 , Youpeng Bao 1 , Zehai Wu 2 , Quan-Wei Lin 3 , Hang Wong 3
Affiliation  

This work presents a design of a fan-beam metasurface with a low profile and a wide operating bandwidth. We introduce a new meta unit of four-loop structure which produces high refractive index over the wide operating bandwidth. The metasurface composes of impedance matching layers and core layers to contribute to the fan-beam radiation. A prototype working at X-band is designed, fabricated, and measured. The measured results agree well with simulated ones. The measured results exhibit a wide bandwidth of 51%. The measured fan-beam radiation performances show that the 3-dB beamwidths on E and H-plane are 17. and 45., respectively. The realized metasurface is with the height of about 0.24 $\lambda_{0}$ , where $\lambda_{0}$ is the wavelength at center frequency in free space. Measured realized gain is about 15.6 dBi at center frequency. In addition, the measured cross polarization discrimination is better than 25 dB across the entire bandwidth.

中文翻译:

具有扇束辐射的薄型宽带超表面天线

这项工作提出了一种具有低剖面和宽工作带宽的扇形光束超表面的设计。我们引入了一种新的四环结构元单元,它在宽工作带宽上产生高折射率。超表面由阻抗匹配层和核心层组成,有助于扇形束辐射。设计、制造和测量了在 X 波段工作的原型。实测结果与模拟结果吻合良好。测量结果显示出 51% 的宽带宽。测量的扇形波束辐射性能表明,E 平面和 H 平面上的 3 dB 波束宽度分别为 17. 和 45.。实现的超表面高度约为 0.24 $\lambda_{0}$, 在哪里 $\lambda_{0}$是自由空间中心频率处的波长。在中心频率处测得的实际增益约为 15.6 dBi。此外,测得的交叉极化鉴别在整个带宽上优于 25 dB。
更新日期:2022-06-29
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