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A Reconfigurable Broadband Polarization Converter Based on an Active Metasurface

机译:基于有源超表面的可重构宽带极化转换器

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摘要

We propose an active metasurface whose functionalities can be dynamically switched among linear-to-linear, linearto-elliptical, and linear-to-circular polarization conversions in a wideband. The active metasurface is composed of butterflyshaped unit cells embedded with voltage-controlled varactor diodes. By controlling the bias voltage of the varactor diodes, the electromagnetic responses of the proposed metasurface can be tailored, leading to reconfigurable polarization conversions. The simulation results reveal that with no bias voltage, the proposed metasurface is able to reflect linear-polarization waves to crosspolarization waves in the frequency range from 3.9 to 7.9 GHz, with a polarization conversion ratio of over 80%; however, at the bias voltage of -19 V, the metasurface is tuned to be a circular polarization converter in a wideband from 4.9 to 8.2 GHz. Moreover, two equivalent circuits along the x- and y-directions are developed to elucidate the tunable mechanism. The experimental results are in a good agreement with the simulation results obtained from commercial software and from the equivalent circuit model.
机译:我们提出了一个有源超表面,其功能可以在宽带中的线性到线性,线性到椭圆形和线性到圆偏振转换之间动态切换。有源超表面由嵌有压控变容二极管的蝶形晶胞组成。通过控制变容二极管的偏置电压,可以调整建议的超颖表面的电磁响应,从而导致可重构的极化转换。仿真结果表明,在没有偏压的情况下,所提出的超颖表面能够将线性极化波反射为频率范围为3.9至7.9 GHz的交叉极化波,极化转换率超过80%。但是,在-19 V的偏置电压下,超颖表面被调谐为4.9至8.2 GHz宽带中的圆偏振转换器。此外,开发了沿x和y方向的两个等效电路,以阐明可调机制。实验结果与从商业软件和等效电路模型获得的仿真结果非常吻合。

著录项

  • 来源
    《Antennas and Propagation, IEEE Transactions on》 |2018年第11期|6086-6095|共10页
  • 作者单位

    Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic and Technology, Guilin, China;

    Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic and Technology, Guilin, China;

    Department of Radio Engineering, State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China;

    Department of Radio Engineering, State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China;

    Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing, School of Information and Communication, Guilin University of Electronic and Technology, Guilin, China;

    Department of Radio Engineering, State Key Laboratory of Millimeter Waves, Southeast University, Nanjing, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Polarization; Varactors; P-i-n diodes; Strips; Switches; Broadband antennas; Metamaterials;

    机译:极化;变容二极管;P-i-n二极管;带状;开关;宽带天线;超材料;

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