适用于金属物体识别的L形无芯RFID标签设计

摘要

A L-shaped chipless RFID tag is proposed for used in the metallic background. The tag comprises six L-shaped scatterers of different sizes,which generate six separate resonant frequencies. The tag can be identified by the backscatter field in the?cross polarization direction. This paper studied the effects of varying the dimensions of the L-shaped scatterer on the tag recognition. Also,the effects of placement of additional metallic ground-plane have also been studied and the result shows that the proposed L-shaped chipless RFID tag can be also identified in the metallic background.%设计了一种L形无芯射频识别标签，该标签包含6个不同尺寸的L形散射单元，利用其交叉极化方向上的反向散射场进行识别。标签基于频域特征进行编码，每个标签可携带6 bit信息。使用CST仿真软件对所设计L形无芯RFID标签进行仿真，分析了L形散射单元的尺寸变化时对标签谐振特性的影响。此外，还仿真了标签的接地板尺寸增加后的情况，证明该标签可适用于金属物体的识别或金属背景下的物体识别。