一款应用于UHF 频段RFID 系统的抗金属近场防伪标签.doc

文档介绍：
一款应用于 UHF 频段 RFID 系统的抗金属
近场防伪标签#
刘盈,李秀萍**
5
10
(北京邮电大学电子工程学院,北京 100876)
摘要:本文设计了一款应用于 UHF 频段 RFID 系统的抗金属近场防伪标签天线。天线由金
属覆盖区和由分段耦合谐振腔组成的近场区两部分组成。分段耦合谐振腔可保持电流同
相,因此在近场区能产生强且均匀的磁场。天线印刷在铜版纸上,大小为 150 × 58 ×
mm3。通过添加简单的匹配网络,天线就能够很方便的与芯片匹配,经过简单调整,就
可以匹配于其它不同输入阻抗的标签芯片。天线带宽为 912MHz~932MHz,远场增益小于
。
关键词:近场标签天线;超高频;抗金属;防伪;射频识别
中图分类号:TN822
15
AN ANTI-METAL TAG ANTENNA FOR UHF
NEAR-FIELD RFID ANTI-COUNTERFEITING
APPLICATIONS
Liu Ying, LI Xiuping
20
25
30
35
(School of Electronic Engineering ,Beijing University of Posts and munications,Beijing
100876)
Abstract: An Ultra-High Frequency (UHF) near-field tag antenna is proposed for radio frequency
identification (RFID) applications. The antenna is consisted of two parts, metal covering area and
the segmented line sections for near-field radiation. The proposed segmented line sections allow
current along the loop to maintain in phase to achieve a strong and uniform ic field in the
near-field region. The antenna is printed on copper-print paper with an overall size of 150× 58 ×
mm3. The antenna input impedance is conveniently matched to plex conjugate of the
RF IC chip impedance. The bandwidth of antenna is 912MHz~932MHz under the condition of
VSWR less than 2. In addition, the gain of the proposed tag antenna is less than .
Key words: near-field tag antenna; UHF; anti-metal; anti-counte