Towards Chipless RFID Based Temperature Sensing for IoT Applications

This paper presents a novel technique to measure temperature by using a chipless RFID tag and smart material in view of loT application. The proposed technique incorporates a unique design of a chipless RFID resonator and a novel chipless technique for sensing temperature by combining ETFE fluroploymer with the resonator. The simulated material is placed on the top of the tag and dielectric parameters are varied. Initially, the original RCS response of the resonator is simulated which is then observed while varying the values of permittivity to obtain a correlation between different frequencies and dielectric constants. This correlation is further compared with the dielectric parameters of the material and the corresponding temperatures found from the literature. Finally, a calibration curve obtained where any temperature within the range can be measured by simply mapping the frequency of operation of the chipless resonator.