一种基于双谐振结构的新型宽带标签天线  

A Novel Broadband Tag Antenna Based on Dual Resonant Structure

作　　者：周晔晔 华昌洲 陆振君 ZHOU Ye-ye;HU A Chang-zhou;LU Zhen-jun(Faculty of Electrical Engineering and Computer Science,Ningbo University,Ningbo 315211,China;Shangyang RFID Technology,Yangzhou 225002,China)

机构地区：[1]宁波大学信息科学与工程学院,宁波315211 [2]上扬无线射频科技扬州有限公司,扬州225002

出　　处：《无线通信技术》2021年第3期33-38,共6页Wireless Communication Technology

基　　金：宁波市自然科学基金(2019A610071)。

摘　　要：本文提出了一种新型宽带标签天线,其工作频段完全覆盖了欧洲、中国等其他地区的超高频RFID频段。采用T-match结构进行馈电,激励标签天线产生高低频双谐振模式。利用空间折叠方法,标签天线的主体结构弯折成U型,来实现天线的小型化。同时,使用Ansoft HFSS软件进行仿真,产生的两个谐振频点分别为850MHz和920MHz;-10dB阻抗带宽为110MHz(从830MHz~940MHz),达到了宽带RFID标签天线的要求。对T-match结构中水平和垂直匹配支节进行优化,使标签天线和RFID芯片(13.5-j145Ω)达到共轭匹配,实现最大功率传输与最高辐射效率(850MHz为96.9%,920MHz为97.4%)。本文提出的标签天线,尺寸为102mm×70.5mm×0.15mm,集成在厚度为0.6mm的介质基板上。This paper proposes a new type of broadband tag antenna whose operating frequency band completely covers the RFID frequency band of Europe,China,and other regions.The tag antenna is fed by a T-match structure to generate high and low-frequency dual resonance modes.Using the spatial folding method,the main structure of the tag is bent into a U-shape to realize the miniaturization of the antenna.At the same time,Ansoft HFSS software is used for simulation,and the two resonance frequency points are 850 MHz and 920 MHz respectively;-10 dB impedance bandwidth is 110 MHz(from 830 MHz to 940 MHz),which meets the requirements of broadband RFID tag antenna.The horizontal and vertical matching stubs in the T-match structure are optimized to make the tag antenna and RFID chip(13.5-j145Ω)obtain conjugate matching and achieve the maximum power transmission and maximum radiation efficiency(96.9%at 850 MHz and 97.4%at 920 MHz).The proposed antenna is 102 mm×70.5 mm×0.15 mm in size and integrated on a dielectric substrate with a thickness of 0.6 mm.

关 键 词：宽带 T-match 共轭匹配 超高频RFID频段 

分 类 号：TN82[电子电信—信息与通信工程]