Wireless Passive Temperature Sensors Using Integrated Cylindrical Resonator/Antenna For Harsh-Environment Applications

Keywords

Cavity resonators; high-temperature techniques; microwave sensors; slot antennas; temperature sensors

Abstract

Wireless passive temperature sensors for harsh-environment applications based on cylindrical microwave cavity resonators are presented herein. Slot antennas are integrated with sensors with zero additional volume. The resonant frequencies of the sensors are determined by the dielectric constants of the ceramic materials, which monotonically increase versus temperature. Silicoboron carbonitride (SiBCN) ceramic materials, which are very robust inside harsh environments featuring high temperatures and corrosive gases, are optimized in this paper to reduce dielectric losses and increase sensing ranges and accuracies. A robust interrogation antenna is developed to wirelessly measure the sensors up to 1300 °C. Two sensors based on Si6B1 and Si4B1 ceramics are measured up to 1050 °C and 1300 °C, respectively, with a sensitivity of ~0.78 MHz/°C at 1050 °C. This type of wireless, passive, and robust sensor can be used for many harsh-environment applications, such as gas turbines.

Publication Date

3-1-2015

Publication Title

IEEE Sensors Journal

Volume

15

Issue

3

Number of Pages

1453-1462

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1109/JSEN.2014.2363426

Socpus ID

84919820358 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84919820358

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