Chinese Journal of Liquid Crystals and Displays, Volume. 39, Issue 1, 17(2024)

Patch antenna adjustable in frequency based on polymer dispersed liquid crystal

Yibing CHU1, Ying XIANG1、*, Wenhui ZHANG1、**, Luguo HAO1, Botao JIANG1, Kai CHEN1, Yanzi GAO2, Yongchuan HU2, and Michal KOHOUT3
Author Affiliations
  • 1School of Information Engineering,Guangdong University of Technology,Guangzhou 510006,China
  • 2Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China
  • 3Department of Organic Chemistry,University of Chemistry and Technology Prague,CZ-16628 Prague,Czech Republic
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    Figures & Tables(14)
    Schematic diagram of liquid crystal molecule deflection of liquid crystal polymer film
    Schematic diagram of a 100 μm thick polymer film with 70% liquid crystal content(mass fraction).(a)Liquid crystal polymer films;(b)Before voltage applied;(c)After voltage applied.
    Polarizing microscope images of 50 μm thick liquid crystal polymer film.(a)Liquid crystal content 50%(mass fraction);(b)Liquid crystal content 60%;(c)Liquid crystal content 70%.
    Polarizing microscope images of a 100 μm thick liquid crystal polymer film.(a)Liquid crystal content 50%;(b)Liquid crystal content 60%;(c)Liquid crystal content 70%.
    Geometry of patch antenna
    Antenna physical image
    Antenna return loss of liquid crystal polymer film with thickness of 50 μm,liquid crystal content of 70%,60%,50%,respectively.
    Antenna return loss of liquid crystal polymer film with thickness of 100 μm,liquid crystal content of 70%,60%,50%,respectively.
    Variation of resonant frequency with bias voltage
    H-plane radiation pattern
    E-plane radiation pattern
    • Table 1. Performance of 50 μm thickness liquid crystal thin film antenna

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      Table 1. Performance of 50 μm thickness liquid crystal thin film antenna

      液晶含量/%谐振频率/GHz施加电压后频率/GHz频率偏移量/MHz驱动电压/V
      705.5585.4966248
      605.4805.4413951
      505.385.3671355
    • Table 2. Performance of 100 μm thickness liquid crystal thin film antenna

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      Table 2. Performance of 100 μm thickness liquid crystal thin film antenna

      液晶含量/%谐振频率/GHz施加电压后频率/GHz频率偏移量/MHz驱动电压/V
      705.5795.50772105
      605.4955.45045111
      505.3895.37217118
    • Table 3. Dynamic response time

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      Table 3. Dynamic response time

      天线调谐介质施加电压响应时间/s撤销电压响应时间/s
      E71.715
      液晶聚合物(含量70%)0.84
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    Yibing CHU, Ying XIANG, Wenhui ZHANG, Luguo HAO, Botao JIANG, Kai CHEN, Yanzi GAO, Yongchuan HU, Michal KOHOUT. Patch antenna adjustable in frequency based on polymer dispersed liquid crystal[J]. Chinese Journal of Liquid Crystals and Displays, 2024, 39(1): 17

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    Paper Information

    Category: Research Articles

    Received: Dec. 10, 2023

    Accepted: --

    Published Online: Mar. 27, 2024

    The Author Email: Ying XIANG (xiangy@gdut.edu.cn), Wenhui ZHANG (zwh83@gdut.edu.cn)

    DOI:10.37188/CJLCD.2023-0400

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