A chipless radio frequency identification (RFID ) sensor based on split ring resonator (SRR ) is designed for real-time monitoring in high temperature environments.It consists of double circular SRR and alumina ceramic substrate with dimensions of 25 mm ×25 mm ×0.5 mm.The working principle is that as the temperature sensitive material alumina (Al2O3 )ceramic substrate has characteristics of high temperature resistant and its permittivity varies with temperature,which results in the shift of resonant frequency of the whole sensor and establishes the relationship between temperature and resonant frequency meaning that real-time monitoring resonant frequency can obtain real-time temperature.Simulation results show that the designed temperature sensor can monitor 200～1000℃ corresponding to resonant frequency decreasing 380 MHz from 6.64 GHz to 6.26 Ghz with excellent sensitivity of 0.475 MHz/℃,which demonstrates the quasi-linear relationship between resonant frequency and temperature.The presented chipless RFID sensor has the advantages of wireless and passive,low cost and small size et al,which is extremely suitable for high temperature monitoring.
chipless RFID high temperature sensorsplit ring resonatoralumina ceramichigh sensitivity
万方数据
维普
