Reconfigurable Fresnel Lens Based on an Active Second-Order Bandpass Frequency-Selective Surface
Reconfigurable Fresnel Lens Based on an Active Second-Order Bandpass Frequency-Selective Surface
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基于有源二阶带通选频面的可重构菲涅尔透镜
DOI：
10.1109/tap.2019.2948392
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发表时间：
2020
影响因子：
5.7
通讯作者：
Ran Lixin
中科院分区：
文献类型：
--
作者：
Li Huan;Ma Chao;Zhou Tianyi;Wang Jun;Ye Dexin;Sun Yongzhi;Zhu Weiqiang;Denidni Tayeb A.;Ran Lixin
在本次通信中，我们通过实验演示了一种基于有源二阶带通频率选择表面（FSS）的频率和波束可重构透镜天线。 FSS 透镜由三个非谐振金属层组成，这些金属层被两个薄介电基板隔开。通过在 FSS 单元中集成微波变容二极管，该带通 FSS 的中心频率可以通过直流 (dc) 偏置电压从 4.0 GHz 调谐到 5.8 GHz。基于这种宽带可调谐性，相位校正技术用于实现微波菲涅耳透镜。实验结果表明，所提出的一维透镜天线可以在1 GHz带宽内实现频率可重构波束控制。所提出的可重构透镜天线具有低成本和结构简洁的优点，具有广泛的应用前景。
In this communication, we experimentally demonstrate a frequency- and beam-reconfigurable lens antenna based on an active second-order bandpass frequency-selective surface (FSS). The FSS lens is composed of three nonresonant metallic layers separated by two thin dielectric substrates. By integrating microwave varactors in FSS unit cells, the center frequency of this bandpass FSS can be tuned from 4.0 to 5.8 GHz by a direct-current (dc) bias voltage. Based on this wideband tunability, the phase-correction technique is used to implement a microwave Fresnel lens. The experimental results show that the proposed 1-D lens antenna can achieve frequency-reconfigurable beam steering within a 1 GHz bandwidth. With advantages of low cost and concise structure, the proposed reconfigurable lens antenna can be potentially used in a wide range of applications.