基于三角形缝隙谐振器的无芯RFID标签设计

Design of chipless RFID tag based on triangle slot resonator

为降低传统射频识别系统中的标签成本,增加编码容量而不显著增大标签面积,基于导体自然谐振提出了一种单面紧凑、可完全印制的无芯片标签。标签由多个等边三角形缝隙环谐振器嵌套组成,通过在导电材料上增加或缺失不同长度的三角形缝隙可有效编码信息,得到各种编码的标签。采用平面电磁波照射标签获得标签的后向散射信号,再利用雷达散射截面(RCS)提取编码信息。将4个相同ID的标签对称放置在基板上,可增大雷达散射截面。在24 mm×22 mm的Taconic TLX-0基板上可实现12 bit的编码容量。仿真验证了标签结构的可行性,且标签数据的读取与入射波的极化方向无关。

In order to reduce cost of tags in traditional RFID system and increase coding capacity without significantly increasing label area,a single surface compact and completely printed chipless tag is presented based on the natural resonance of conductor. The tag is composed of multiple equilateral triangle slot ring resonators nest. By adding or missing triangular slot with different lengths on the conductive material,it can effectively encode information and get various coded tag. The back scattering signal of the tag is obtained by using the plane electromagnetic wave to illuminate the tag,and then the coded information is extracted by using the radar cross section（ RCS）. The RCS can be increased by placing 4 same ID tags on the substrate symmetrically. The coding capacity of 12 bit can be achieved on the 24 mm × 22 mm Taconic TLX-0 substrate. The feasibility of the tag structure is verified by simulation,and the reading of the tag data is independent of the polarization direction of the incident wave.