西安邮电大学自动化学院
纸质出版:2024
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王博, 李有为. 无芯片RFID高温传感器设计[J]. 传感器与微系统, 2024,(6):81-83+87.
王博, 李有为. 无芯片RFID高温传感器设计[J]. 传感器与微系统, 2024,(6):81-83+87. DOI: 10.13873/J.1000-9787(2024)06-0081-03.
设计了一种用于高温环境实时监测的基于开口环谐振器(SRR)的无芯片射频识别(RFID)传感器。传感器由双开口圆环谐振结构和氧化铝(Al
2
O
3
)陶瓷基板构成,尺寸为25 mm×25 mm×0.5 mm。其工作原理是:Al
2
O
3
陶瓷基板作为温度敏感材料,具有耐高温的特性,而且介电常数随温度变化而改变,使得整只传感器谐振频率偏移,建立起温度与谐振频率之间的关系,实时监测谐振频率即可获知实时温度。仿真结果表明:设计的温度传感器可以实现200~1 000℃监测,对应谐振频率从6.64 GHz下降至6.26 GHz
偏移380 MHz
传感器灵敏度0.475 MHz/℃表现很好,证明了传感器的谐振频率和温度之间存在着准线性关系。设计的无芯片RFID传感器具有无线无源、制作成本低和尺寸小等优点,非常适合应用于高温环境温度检测。
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