可完全印刷的无芯片RFID标签设计

摘要

In order to reduce the cost of traditional tags in radio frequency identification( RFID) system,and increase the data density and coding capacity of tag,a printable chipless RFID tag based on I-shaped slot is proposed. By adding slots of different lengths on the conductor board,and regularly arranging and combining the slots,information can be efficiently encoded. When the surface of the tag is irradiated with a plane electromagnetic wave,a backscattered signal of the tag can be obtained,and the coded information hidden in the tag is extracted using the radar cross section. Four resonators are fabricated on a 30 mm × 17 mm TLX-0 substrate. The simulation results show that each I-shaped slot of the tag corresponds to one resonant frequency. Frequency-shift coding is used, which combines on-off keying ( OOK) and pulse-position modulation ( PPM) ,only four resonators can achieve 8-bit encoding capacity,thus the encoding capacity is doubled. The costs of tag is lower,only one conductive layer can be printed directly on the ID card or even on paper,this lays the foundation for the application of the Internet of Things technology.%为降低传统无线射频识别(RFID)系统中标签的成本,增加标签的数据密度和编码容量,提出了一种基于I型缝隙的、可打印的无芯片RFID标签.通过在导体板上增加不同长度的缝隙,将缝隙有规律地排列组合,可有效地编码信息.当采用平面电磁波照射标签表面时,可获得标签的后向散射信号,并利用雷达散射截面提取隐藏在标签中的编码信息.在30 mm×17 mm的TLX-0基板上制作了4个谐振器.仿真结果表明,标签的每个I型缝隙对应一个谐振频率.采用脉冲存在编码(OOK)和脉冲位置编码(PPM)相结合的频移编码,仅4个谐振器就可实现8 bit的编码容量,使编码容量提升了一倍.该标签成本较低,仅有一个导电层,可直接印刷在ID卡甚至纸张上,为物联网技术的应用奠定了基础.