西安电子科技大学学报

• 研究论文 • 上一篇    下一篇

多阶阻抗匹配与宽频带天线的设计分析

王乐;赵志鹏;李亚楠;刘金海;尹应增;李晖   

  1. (西安电子科技大学 天线与微波技术重点实验室,陕西 西安 710071)
  • 收稿日期:2018-03-14 出版日期:2018-10-20 发布日期:2018-09-25
  • 通讯作者: 尹应增(1964-),男,教授,博士,E-mail:yzyin@mail.xidian.edu.cn
  • 作者简介:王乐(1993-),男,西安电子科技大学硕士研究生,E-mail:18792698502@139.com
  • 基金资助:

    国家自然科学基金资助项目(61501340,61701366);中国博士后科学基金资助项目(2016M602769)

Design and analysis of multi-tuned impedance matching and broadband antennas

WANG Le;ZHAO Zhipeng;LI Ya'nan;LIU Jinhai;YIN Yingzeng;LI Hui   

  1. (Science and Technology on Antennas and Microwave Lab., Xidian Univ., Xi'an 710071, China)
  • Received:2018-03-14 Online:2018-10-20 Published:2018-09-25
  • Contact: yzyin@mail.xidian.edu.cn

摘要:

为了实现天线的宽频带,从阻抗匹配的基本理论出发,将天线等效为单端口的微波谐振电路,通过多阶阻抗匹配网络来实现天线阻抗带宽的展宽.在具体的天线设计中,可以在天线的馈电网络上或者辐射体上进行多阶阻抗匹配.给出的两个实例验证了多阶阻抗匹配的可行性和有效性.研究结果表明,通过在弯折单极子天线引入阻抗匹配环,实现了二阶的阻抗匹配,其相对带宽从9.70%增加到46.80%;通过在套筒单极子天线引入4根匹配金属柱,实现三阶的阻抗匹配,其相对阻抗带宽从55.14%展宽到82.11%.

关键词: 阻抗匹配方程, 多阶阻抗匹配, 展宽阻抗带宽, 宽带天线

Abstract:

In order to broaden the impedance bandwidth of an antenna, the multi-tuned impedance matching technology can be utilized. An antenna can be equivalent to a single-port microwave resonant circuit according to the theory of impedance matching. In a practical antenna design, multi-tuned impedance matching can be performed on either the antenna feed network or the radiator. Two examples are given to validate the feasibility and effectiveness of the multi-tuned impedance matching technology. Experimental results show that a folded monopole achieves double-tuned impedance matching by introducing a loop, thus enhancing its fractional impedance bandwidth from 9.70% to 46.80%. In addition, a sleeve antenna obtains a triple-tuned impedance matching with the presence of four metal pillars, thus improving its band of operation from 55.14% to 82.11%.

Key words: impedance matching equation, multi-tuned impedance matching, improve the impedance bandwidth, broadbandantenna

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