超高频（UHF）小型无源抗金属射频识别RFID天线设计

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超高频（UHF）小型无源抗金属射频识别RFID天线设计

摘要： 设计了一款应用于超高频（UHF）频段的小型无源抗金属射频识别（RFID）电子标签天线。在一端端口封闭式小型微带天线的基础上，基板采用介电常数为22的微波介质陶瓷可以进一步减小天线尺寸，馈电方式为一端通过短路片接地的插入式馈电，通过对辐射贴片另一端加载短路片来实现宽频带。使用HFSS仿真软件进行天线设计，天线尺寸约为32 mm×24 mm×4 mm，置于200 mm×200 mm的金属板上，在860~960 MHz的工作频段内，S11<-15 dB，阻抗匹配极好，MATLAB仿真的读取距离约为7 m。标签天线的整体设计满足小型化、抗金属、宽频带、低成本的设计要求。

关键词：射频识别抗金属标签天线小型化

中图分类号： TN827+.2

文献标识码： A

DOI：10.16157/j.issn.0258-7998.180563

中文引用格式： 景裕文，崔英花. 一种小型无源UHF抗金属标签天线的设计[J].电子技术应用，2018，44(11)：13-16.

英文引用格式： Jing Yuwen，Cui Yinghua.Design of a small passive UHF anti-metal label antenna[J]. Application of Electronic Technique，2018，44(11)：13-16.

Design of a small passive UHF anti-metal label antenna
Jing Yuwen，Cui Yinghua
College of Computer，Beijing Information Science & Technology University，Beijing 100101，China

Abstract： This paper designs a UHF band and small passive anti-metal RFID electronic tag antenna. On the basis of one end port enclosed small micro-strip antenna, the substrate uses dielectric constant in 22 of the microwave dielectric ceramic to further decrease the size of the antenna. Insert-fed is adopted，in which one end grounds through short-circuit patch，and the other end of the radiation patch loads short-circuit patch to redize broadband. Using HFSS simulation software for antenna design, the size of the antenna is about 32 mm×24 mm×4 mm, which is placed on a 200 mm×200 mm metal plate. In the working band of 860～960 MHz, S11 is less than -15 dB, impedance matching is excellent, and the reading distance of the simulation of MATLAB is about 7 m. The overall design of the tag antenna meets the design requirements of miniaturization, anti-metal, broadband, and low cost.

Key words : radio frequency identification；anti-metal；tag antenna；miniaturization

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