华南理工大学学报(自然科学版) ›› 2011, Vol. 39 ›› Issue (5): 1-5.doi: 10.3969/j.issn.1000-565X.2011.05.001

• 电子、通信与自动控制 •    下一篇

一种适用于多标准的宽带RFID标签天线

褚庆昕 曾锐华   

  1. 华南理工大学 电子与信息学院,广东 广州 510640
  • 收稿日期:2010-08-09 修回日期:2010-11-18 出版日期:2011-05-25 发布日期:2011-04-01
  • 通信作者: 褚庆昕(1958-),男,教授,博士生导师,主要从事射频电路与天线研究 E-mail:qxchu@scut.edu.cn
  • 作者简介:褚庆昕(1958-),男,教授,博士生导师,主要从事射频电路与天线研究
  • 基金资助:

    国家自然科学基金一广东省联合基金重点项目(U0635004);国家自然科学基金资助项目(60571056);广东省自然科学基金重点项目(07118061)

A Broadband Antenna for the Application toMulti-Standard UHF RFID Tag

Chu Qing-xin  Zeng Rui-hua   

  1. School of Electronic and Information Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2010-08-09 Revised:2010-11-18 Online:2011-05-25 Published:2011-04-01
  • Contact: 褚庆昕(1958-),男,教授,博士生导师,主要从事射频电路与天线研究 E-mail:qxchu@scut.edu.cn
  • About author:褚庆昕(1958-),男,教授,博士生导师,主要从事射频电路与天线研究
  • Supported by:

    国家自然科学基金一广东省联合基金重点项目(U0635004);国家自然科学基金资助项目(60571056);广东省自然科学基金重点项目(07118061)

摘要:

提出了一种宽带标签天线,该天线适用于多标准超高频射频识别(RFID)系统,由一个类偶极子辐射体和一个电感耦合馈电环构成。类偶极子辐射体包含两个变型弯折偶极子天线。这两个变型弯折偶极子天线的长度有差别,可以形成两个相近的谐振点,使得天线的阻抗(特别是虚部)在840~956MHz的范围内保持平稳,以获得与芯片阻抗在较宽频段内的良好的共轭阻抗匹配,从而使天线获得一个非常宽的带宽(816~988 MHz),该带宽足以覆盖全球超高频RFID频率范围,使得标签可以全球通用,大大减少了重复设计工作量,有效降低了成本。最后基于仿真模型,加工了一个天线实物,实物测量结果与仿真结果吻合良好。

关键词:

Abstract:

Proposed in this paper is a broadband antenna for the application to multi-standard UHF RFID ( RadioFrequency Identification) tag,which is composed of a dipole-like radiating body and a inductively-coupled feedingloop. The radiating body consists of two modified meandered dipole antennas different in length so as to form tworesonance points only slightly different in frequency. Thus,the antenna impedance,especially its imaginary part,keeps steady in the frequency range of 840 to 956 MHz,and good conjugate impedance matching to the RFID tagchip is obtained. The bandwidth of the antenna varies from 816 to 988 MHz,which is wide enough to cover theglobal ultrahigh-frequency RFID frequency range,so that the tags with the proposed antenna can be used globallywithout replicate design and the cost is greatly reduced. Finally,an antenna prototype is fabricated based on thesimulation model,with good accordance being found between the simulated and the measured results.

Key words: dipole antenna, receiving antenna, microstrip antenna, impedance matching, radio frequency identification