Design of a Wireless Passive Temperature Measurement System

This paper presents a design scheme for a passive wireless temperature measurement system in high-temperature environments. A slotted cylindrical resonator is used as the sensor, and a high-gain horn antenna is used as the external excitation source. Simulation results show that the system can achieve a test distance of 58 mm and sensitivity up to 386.35 MHz ⁻¹ @17.8 GHz. The proposed temperature measurement system has a simple structure, high sensitivity, and long contact distance, and it can be used for temperature measurement from 25 °C to 700 °C in harsh environments.