| 孙 英,花赛月,刘乃源,周 严,翁 玲.变形工作状态下非等间距柔性 NFC 标签天线设计[J].电子测量与仪器学报,2022,36(5):57-66 |
| 变形工作状态下非等间距柔性 NFC 标签天线设计 |
| Design of non-equal spacing flexible NFC tag antennaunder deformed working states |
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| DOI： |
| 中文关键词: 柔性 NFC 天线 变形工作状态 镓铟合金液态金属 非等间距 |
| 英文关键词:flexible NFC tag antenna deformed working states gallium-indium liquid metal non-equal spacing |
| 基金项目:国家自然科学基金项目（52077052）资助 |
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| Author | Institution |
| Sun Ying | 1. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology,2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology |
| Hua Saiyue | 1. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology,2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology |
| Liu Naiyuan | 1. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology,2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology |
| Zhou Yan | 3. College of Science, Tianjin University of Commerce |
| Weng Ling | 1. Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability of Hebei Province, Hebei University of Technology,2. State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology |
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| 中文摘要: |
| 柔性 NFC 标签天线常处于变形工作状态,为解决该工作状态下易出现的频率偏移及偏移引起的工作性能下降问题,提
高其在人体无线健康监测应用领域的适用性,本文设计了一款可贴合人体皮肤且性能优良的柔性 NFC 标签天线。 该天线采用
镓铟液态金属作为柔性导电材料,与 PDMS 柔性衬底材料相结合,使其具有良好的可拉伸性和可弯曲性;基于小型化 NFC 天线
设计的原则,提出非等间距结构设计方案,提高其工作带宽,实现 NFC 标签天线在变形工作状态下依然保持相对稳定的电学参
数、谐振频率及通信距离,增强其工作稳定性。 通过仿真和实验测试结果表明,外形尺寸为 25 mm×25 mm 且线间距增长率为
200%的非等间距 NFC 标签天线,在-10 dB 以下工作带宽高达 0. 87 MHz,相较于具有相同面积的等间距天线,工作带宽最大增
幅高达 52. 6%;针对此柔性 NFC 标签天线应用环境的特殊性,通过不同变形状态下的工作性能稳定性测试显示,30%拉伸工作
状态时,天线的中心频率偏移率仅为 3. 2%;曲率半径为 5 mm 的弯曲工作状态时,天线的中心频率偏移率仅为 2. 4%,天线通信
距离始终不低于 30 mm,在变形工作状态下总体表现出良好的工作稳定性。 |
| 英文摘要: |
| Since the flexible NFC tag antenna is usually in a deformed working state, in order to solve the problem of frequency offset
and the performance degradation caused by the frequency offset in this working state, and to improve its applicability in the application of
wireless human health monitoring, a flexible NFC tag antenna with human skin adaptation and excellent performance is designed. The
antenna uses gallium indium liquid metal as a flexible conductive material, combined with PDMS flexible substrate material to enhance
the stretchability and flexibility of the NFC tag antenna. Based on the principle of miniaturized NFC antenna design, this paper proposes
a novel non-equal spacing structural design scheme to increase the working bandwidth of the antenna, maintain relatively stable electrical
parameters, resonant frequency as well as communication distance under different deformed states and improve the working stability. The
simulation and experimental results show that the working bandwidth below -10 dB of the non-equal spacing NFC tag antenna with an
external size of 25 mm× 25 mm and a line spacing growth rate of 200% can reach 0. 87 MHz. Compared with an equal line spacing
antenna with the same area, the maximum increase in working bandwidth is up to 52. 6%. Aiming to the particularity of the application
environment of this flexible NFC tag antenna, in the stretching working state with a stretching degree of 30% and the bending working
state with a curvature radius of 5 mm, the center frequency deviation of the antenna is 3. 2% and 2. 4%. The antenna communication
distance is always no less than 30 mm, and it shows good working stability under deformed working states. |
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