Passive wireless temperature sensors for harsh environment

Temperature is the key parameter of the operating state in the power system. The occurrence of faults of high-voltage transformer, cable joint and other power equipment is often accompanied by abnormal temperature rise. Wireless monitoring of the temperature can effectively prevent accidents and ensure the safe and stable operation of the equipment. Here two kinds of passive wireless temperature sensors based on the effective localized surface plasmons or near-zero-index (NZI) medium have been demonstrated. The simulation results show that the passive wireless sensors can effectively perceive the temperature change and verify the feasibility of the sensors.