Industrial equipment in fields such as oil and gas exploration and metal smelting often operates under extreme high-temperature conditions.Therefore

real-time and accurate temperature measurement is essential.A temperature sensor suitable for harsh environments is proposed.The sensor employs a six-arm step-shaped snowflake structure as its surface metal pattern and integrates a slot antenna on the bottom side.This design enhances sensitivity and quality factor (

Q

-value)

enabling real-time and accurate temperature measurement under high-temperature conditions.Experimental results show that as the temperature increases from 25℃ to 1400℃

the resona

nt frequency shifts by 0.52478GHz

corresponding to an overall sensitivity of 379.67kHz/℃.The resonance curve remains sharp with a high

Q

-value

demonstrating the sensor’s capability to operate in extreme environments.The proposed microwave scattering temperature sensor with a six-arm snowflake configuration offers a new approach for the development of wireless passive high-temperature sensors.