Dielectrically-Loaded Cylindrical Resonator-Based Wireless Passive High-Temperature Sensor
1
Key Laboratory of Instrumentation Science & Dynamic Measurement, Ministry of Education, North University of China, Taiyuan 030051, China
2
Science and Technology on Electronic Test and Measurement Laboratory, North University of China, Taiyuan 030051, China
3
Department of Mechanical & Electrical Engineering, Xiamen University, Xiamen 361005, China
*
Authors to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Academic Editor: Stephane Evoy
Sensors 2016, 16(12), 2037; https://doi.org/10.3390/s16122037
Received: 14 August 2016
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Revised: 18 November 2016
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Accepted: 24 November 2016
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Published: 1 December 2016
(This article belongs to the Special Issue Resonator Sensors)
The temperature sensor presented in this paper is based on a microwave dielectric resonator, which uses alumina ceramic as a substrate to survive in harsh environments. The resonant frequency of the resonator is determined by the relative permittivity of the alumina ceramic, which monotonically changes with temperature. A rectangular aperture etched on the surface of the resonator works as both an incentive and a coupling device. A broadband slot antenna fed by a coplanar waveguide is utilized as an interrogation antenna to wirelessly detect the sensor signal using a radio-frequency backscattering technique. Theoretical analysis, software simulation, and experiments verified the feasibility of this temperature-sensing system. The sensor was tested in a metal-enclosed environment, which severely interferes with the extraction of the sensor signal. Therefore, frequency-domain compensation was introduced to filter the background noise and improve the signal-to-noise ratio of the sensor signal. The extracted peak frequency was found to monotonically shift from 2.441 to 2.291 GHz when the temperature was varied from 27 to 800 °C, leading to an average absolute sensitivity of 0.19 MHz/°C.
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Keywords:
temperature sensing; dielectric resonator; relative permittivity; high-temperature environment
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MDPI and ACS Style
Xiong, J.; Wu, G.; Tan, Q.; Wei, T.; Wu, D.; Shen, S.; Dong, H.; Zhang, W. Dielectrically-Loaded Cylindrical Resonator-Based Wireless Passive High-Temperature Sensor. Sensors 2016, 16, 2037. https://doi.org/10.3390/s16122037
AMA Style
Xiong J, Wu G, Tan Q, Wei T, Wu D, Shen S, Dong H, Zhang W. Dielectrically-Loaded Cylindrical Resonator-Based Wireless Passive High-Temperature Sensor. Sensors. 2016; 16(12):2037. https://doi.org/10.3390/s16122037
Chicago/Turabian StyleXiong, Jijun, Guozhu Wu, Qiulin Tan, Tanyong Wei, Dezhi Wu, Sanmin Shen, Helei Dong, and Wendong Zhang. 2016. "Dielectrically-Loaded Cylindrical Resonator-Based Wireless Passive High-Temperature Sensor" Sensors 16, no. 12: 2037. https://doi.org/10.3390/s16122037
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