Journal of South China University of Technology (Natural Science Edition) ›› 2011, Vol. 39 ›› Issue (5): 1-5.doi: 10.3969/j.issn.1000-565X.2011.05.001

• Electronics, Communication & Automation Technology •     Next Articles

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)

PDF

1812

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