基于方形螺旋谐振器的紧凑型RFID标签天线  

Compact RFID tag antenna based on square spiral resonator

作　　者：戴利斌 许志猛[1] 袁家德[1] DAI Libin;XU Zhimeng;YUAN Jiade(College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学物理与信息工程学院,福建福州350108

出　　处：《物联网学报》2024年第1期147-152,共6页Chinese Journal on Internet of Things

基　　金：福州市科技重大项目(No.2022-ZD-002)。

摘　　要：设计了一种小型化超高频(UHF,ultra-high frequency)射频识别(RFID,radio frequency identification)标签天线。该天线由内外两个方形螺旋谐振器短接构成,通过改变外圈螺旋谐振器的边长和内外圈螺旋谐振器的间距,可以有效调节标签天线的谐振频率。仿真结果表明,标签天线阻抗匹配良好,频带范围覆盖整个超高频频段(840~960 MHz),总尺寸为7.60 mm×7.60 mm×0.05 mm,比传统螺旋谐振器(SR,spiral resonator)天线小96%。测试结果表明,在4 W有效全向辐射功率条件下,标签天线在910 MHz处读取距离达到最大。所提小型化超高频射频识别标签天线具有尺寸小、频带宽、成本低和易于批量制作的特点,适用于对尺寸要求较小的应用环境。A miniaturized ultra-high frequency(UHF)radio frequency identification(RFID)tag antenna was designed.The antenna was composed of two square spiral resonators shorted inside and outside.By adjusting the edge length of the outer ring spiral resonator and the spacing between the inner and outer ring spiral resonators,the resonant frequency of the proposed tag antenna could be effectively tuned.The simulation results show that the proposed tag antenna has good impedance matching and the frequency band range covers the whole UHF band(840~960 MHz).It has a dimension of 7.60 mm×7.60 mm×0.05 mm,which is 96%smaller than the traditional spiral resonator(SR)antenna.The measure result shows that the proposed tag antenna achieves the maximum reading distance at 910 MHz in 4 W effective isotropic radiated power.The proposed UHF RFID tag antenna has some advantages of small size,wide frequency band,low cost and easy batch fabrication,and is suitable for applications with small size requirements.

关 键 词：超高频 射频识别 螺旋谐振器 小型化 标签天线 

分 类 号：TN828.4[电子电信—信息与通信工程]