A Flexible Millimeter-Wave Endfire Antenna Based on Spoof Surface Plasmon Polaritons
A Flexible Millimeter-Wave Endfire Antenna Based on Spoof Surface Plasmon Polaritons
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DOI：
10.1109/lawp.2023.3315521
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发表时间：
2024-01
影响因子：
4.2
通讯作者：
Qingfeng Fu;Leilei Liu;G. Luo
中科院分区：
文献类型：
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作者：
Qingfeng Fu;Leilei Liu;G. Luo
提出了一种基于欺骗表面等离子体激元的毫米波柔性端射天线。首先，由于SSPP具有很强的场约束，可以保证天线弯曲时的场分布几乎不变，从而使其阻抗特性保持相对稳定。然后，为了实现端射辐射，提出了一种由微带缝隙结构馈电的对称SSPPS传输线。最后，端射天线工作在30-50 GHz的频率范围内，天线的平均增益为14.9dBI，天线的总尺寸为9.2λ0×2.67λ0×0.016λ0。此外，该天线在弯曲时仍能保持良好的辐射性能，其最大辐射角与弯曲角成线性对应关系。当天线弯曲角度从0°变化到30°时，最大辐射角从0°增大到24°，增益波动在2分贝以内，表明柔性天线具有良好的稳定辐射性能。该天线具有带宽宽、体积小、灵活性强等优点，在未来的柔性电路和可穿戴系统中具有良好的应用前景。
A flexible endfire antenna based on spoof surface plasmon polaritons (SSPPs) is proposed at millimeter-wave band. First, due to the strong field confinement of SSPPs, it can ensure that the field distribution of the antenna is almost unchanged when it is bent, so that its impedance characteristics remain relatively stable. Then, to realize the endfire radiation, a symmetrical SSPPs transmission lines fed by a microstrip-slotline structure is proposed. Finally, an endfire antenna operates in the frequency range of 30–50 GHz, over which the average gain of this antenna is 14.9 dBi, and the overall size of this antenna is 9.2λ0×2.67λ0×0.016λ0. Besides, this antenna can still maintain good radiation performance in bending, and its maximum radiation angle changes with a linear correspondence of the bending angle. When the bending angle of the antenna changes from 0° to 30°, the maximum radiation angle increases from 0° to 24°, and the gain fluctuates within 2 dB, which shows that the flexible antenna has good stable radiation performance. The proposed antenna holds the advantages of wide bandwidth, small size and flexibility, and has a good prospect in the future flexible circuit and wearable systems.