一种小型化定向辐射RFID阅读器天线设计  

A compact directional radiation ring antenna for UHF RFID reader application

作　　者：丘荣文 袁家德[1] QIU Rongwen;YUAN Jiade(College of Physics and Information Engineering,Fuzhou University,Fuzhou,Fujian 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：《福州大学学报（自然科学版）》2021年第1期39-43,共5页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2019J01638);福建省高校产学合作基金资助项目(2019H6007)。

摘　　要：设计一种应用于超高频射频识别(UHF RFID)阅读器的小型化定向性环形天线.天线由分别印制于两层介质板上的辐射贴片和接地面组成,辐射贴片为弯折的环形结构,两个矩形寄生单元放在环形内部通过探针短接到地,接地板内部开一圆环形槽.天线总体尺寸为0.275λg×0.275λg×0.05λg(λg为中心频率915 MHz对应的波长).实测结果表明,S 11≤-10 dB的阻抗带宽为10.2%(890~986 MHz),增益为4.4 dBi.该天线在接地面仅略大于辐射贴片情况下实现了较好的定向性,结构简单,尺寸小,适合应用于特定环境RFID系统中.In this paper,a compact directional radiation ring antenna for UHF RFID reader application is proposed.The antenna consists of a radiation patch and a ground surface printed on two dielectric plates.The radiation patch is a meandered ring structure with two rectangular parasitic patch placing inside the ring and connected to the ground by a probe,and a circular slot is opened inside the ground plate.The overall size of the antenna is 0.275λg×0.275λg×0.05λg(λg is the wavelength corresponding to the central frequency of 915 MHz).The measured results show that the impedance bandwidth of S 11≤-10 dB is 10.2%(from 890 to 986 MHz)and the gain is 4.4 dBi.The antenna is simple in structure and small in size,which is suitable for RFID system in specific environment.

关 键 词：射频识别(RFID) 天线小型化 定向辐射 环形天线 

分 类 号：TN822[电子电信—信息与通信工程]