北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2022, Vol. 45 ›› Issue (5): 66-71.

• 论文 • 上一篇    下一篇

基于压电效应的低频无线通信机械天线

杨靖1,温习2,3,杨绍隆1,潘绪超2,毕科1   

  1. 1. 北京邮电大学 信息光子学与光通信国家重点实验室
    2. 南京理工大学 机械工程学院
    3. 中国人民解放军32381部队
  • 收稿日期:2021-10-28 修回日期:2021-11-23 出版日期:2022-10-28 发布日期:2022-11-01
  • 通讯作者: 毕科 E-mail:bike@bupt.edu.cn
  • 基金资助:
    中央高校基本科研业务费专项资金项目; 国家自然科学基金项目

Low-Frequency Wireless Communication Mechanical Antenna Based on Piezoelectric Effect

YANG Jing1, WEN Xi2,3, YANG Shaolong1, PAN Xuchao2,  BI Ke1 #br#   

  • Received:2021-10-28 Revised:2021-11-23 Online:2022-10-28 Published:2022-11-01
  • Contact: BI Ke E-mail:bike@bupt.edu.cn
  • Supported by:
    Fundamental Research Funds for the Central Universities; National Natural Science Foundation of China

摘要: 传统电天线的尺寸与其发射电磁波的波长相近低频电磁波(30 ~ 300 kHz)的波长达数公里,低频电天线存在尺寸过大隐蔽性差功耗大等问题为解决电天线尺寸和功耗大的问题,同时提高低频无线通信应用的灵活性,提出了一种基于压电效应的机械天线,机械天线是利用机械运动的电荷直接激励产生电磁波研究了压电机械天线工作的物理机理; 通过阻抗-频率曲线研究压电机械天线的阻抗特性; 利用无线通信系统对比了不同边长压电机械天线的低频辐射性能; 同时验证了压电机械天线辐射的磁场随无线通信系统接收端与压电机械天线距离的变化规律结果表明,压电机械天线在便携式低成本和高性能低频无线通信应用中具有巨大潜力

关键词: 压电, 机械天线, 无线通信, 低频

Abstract: The size of traditional electric antenna is proportional to the transmitted wavelength. Although the low-frequency electromagnetic wave (30 ~ 300 kHz) reaches several kilometers, the low-frequency electric antenna has some problems, such as excessively large size, poor concealment and high power consumption. To solve the problems of large size and power consumption of electrical antenna and improve the flexibility of low-frequency wireless communication applications, a mechanical antenna based on piezoelectric effect is proposed. Mechanical antenna generates electromagnetic waves by direct excitation of mechanical motion charges. The physical mechanism of the piezoelectric mechanical antenna is studied. The impedance characteristics of piezoelectric mechanical antenna are studied by impedance frequency curve. The low-frequency radiation performances of piezoelectric mechanical antennas with various side lengths are compared by using a wireless communication system. Meanwhile, the magnetic field radiated by piezoelectric mechanical antenna changes with the distance between the receiving end of wireless communication system and piezoelectric mechanical antenna, and its variation law is verified. The result shows that the piezoelectric mechanical antenna has great potential in portable, low-cost and high-performance low-frequency wireless communication applications.

Key words: piezoelectric, mechanical antenna, wireless communication, low-frequency

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