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一种宽频带RFID阅读器天线的设计
引用本文:彭章友,孟春阳,任秀方,李帅.一种宽频带RFID阅读器天线的设计[J].电子测量技术,2015,38(5):19-23.
作者姓名:彭章友  孟春阳  任秀方  李帅
作者单位:特种光纤与光接入网省部共建重点实验室 上海大学 上海200072
基金项目:上海市科学技术委员会重点支撑(12510500600)项目
摘    要:UHF RFID标签在密集布放环境下,会由于标签天线间的互相影响,使工作频率发生偏移,造成系统漏读.因而本文设计了一款新型的圆极化阅读器天线,该天线工作在UHF频段,具有小型化、高增益、宽频带的特点.其中主辐射圆形贴片通过4个探针与微带匹配网络上下相连,匹配网络的引入提高了天线的圆极化轴比和工作带宽.仿真结果表明,该天线在UHF频段的阻抗带宽和3 dB轴比带宽分别为13%和5%,增益高达9.4 dBi.在空旷的环境下,对密集布放的多个RFID标签进行读取测试.实验表明,运用宽频带的RFID阅读器天线可以有效地提高标签的读取率.

关 键 词:圆极化  宽频带  馈电网络

Design of a wide band RFID reader antenna
Peng Zhangyou,Meng Chunyang,Ren Xiufang,Li Shuai.Design of a wide band RFID reader antenna[J].Electronic Measurement Technology,2015,38(5):19-23.
Authors:Peng Zhangyou  Meng Chunyang  Ren Xiufang  Li Shuai
Affiliation:Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University
Abstract:When Ultra High Frequency Radio Frequency Identification (UHF RFID) tags in dense cloth environment, the work frequency of stacked RFID tags will be deviated by the mutual influence between the tag antennas, and the system read rate will be declined. This paper designed a new type of circular polarization reader antenna, which works in the UHF frequency band, has the characteristics of miniaturization, high gain, and wide band. In this antenna, the main radiation circular patch is connected up and down by four probes to the matching network, which can effectively improve the circular polarization axial ratio bandwidth and work bandwidth of antenna. The simulation results show the antenna has 13% bandwidth of impedance and 5% bandwidth of 3 dB axial ratio, and 9.4 dBi gain in the UHF frequency. In the open environment, we test the tag read rate of intensive multiple RFID tags. The experimental results show that the wide band RFID reader antenna is available.
Keywords:circular polarization  wide band  matching network
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