开槽无芯片RFID湿度传感器设计研究

发布时间：2018-05-26 18:24

  本文选题：射频识别 + 湿度传感器　； 参考：《电子测量与仪器学报》2017年07期

【摘要】：提出了一种基于RFID技术的无芯片湿度传感器标签。通过开槽蚀刻技术在覆铜FR4材料上制作缝隙散射体结构。标签结构分为两个单元:编码单元借助不同长度的缝隙组合存储ID信息;通过在缝隙表面覆盖硅纳米线沉淀层构成传感单元,用来感知湿度的变化。该方案结构简单、成本低,无任何后处理工艺。测试系统利用交叉极化的两台喇叭天线作为发射和接收天线,依据雷达电磁反向散射原理测量传输系数曲线进而获取标签的ID信息和外界湿度信息。实验测试表明在25℃温度及30%~90%的相对湿度范围内,该无芯片湿度传感器标签在215 MHz的频带范围内中心谐振频率与相对湿度呈现稳定的近似线性关系,其灵敏度超过2.9 MHz/%RH。
[Abstract]:A chipless humidity sensor label based on RFID technology is proposed. Slot scatters were fabricated on copper clad FR4 by slotted etching. The tag structure is divided into two units: the coding unit stores ID information with the combination of gaps of different lengths, and the sensing unit is formed by covering the surface of the gap with the silicon nanowire precipitation layer, which is used to sense the change of humidity. The structure of the scheme is simple, the cost is low and there is no post-treatment process. Two horn antennas with cross-polarization are used as transmitting and receiving antennas in the test system. According to the principle of radar electromagnetic backscattering, the transmission coefficient curve is measured and the ID information and the external humidity information of the tag are obtained. The experimental results show that in the temperature range of 25 鈩，

本文编号：1938395