A chipless RFID tag for humidity sensing

Dong Yan; Yifei Chen; Shouqian Huang; Jing Gu

doi:10.1117/12.2635210

25 April 2022 A chipless RFID tag for humidity sensing

Dong Yan, Yifei Chen, Shouqian Huang, Jing Gu

Proceedings Volume 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022); 1224410 (2022) https://doi.org/10.1117/12.2635210
Event: 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 2022, Guilin, China

Abstract

Chipless RFID tags have greatly expanded the application range of sensors because of their advantages of passive wireless, and have become one of the research hotspots of sensors. Compared with traditional RFID tags, chipless RFID tags have smaller size and higher sensitivity, and they are also widely used in the field of humidity sensors. In this paper, a chipless RFID tag for humidity sensing is designed. It can be divided into three layers from top to bottom: humidity sensitive material layer, tag resonance unit and dielectric substrate. The humidity sensitive material layer covers the surface of the tag’s resonant unit, and the tag patch unit is placed on the upper surface of the dielectric substrate. The tag resonance unit adopts three nested "D" shaped resonance rings. The inner ring belongs to the sensing unit, which is responsible for detecting the environmental humidity, and the outer two rings belong to the encoding unit, which is responsible for the tag identity coding. The effective frequency of the tag is between 3~9GHz, the coding capacity is 4bits, and the frequency shift bandwidth is 100MHz. It has the advantages of no chip, low cost, miniaturization, strong anti-interference ability and so on.

Citation Download Citation

Dong Yan, Yifei Chen, Shouqian Huang, and Jing Gu "A chipless RFID tag for humidity sensing", Proc. SPIE 12244, 2nd International Conference on Mechanical, Electronics, and Electrical and Automation Control (METMS 2022), 1224410 (25 April 2022); https://doi.org/10.1117/12.2635210

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KEYWORDS

Computer programming

Humidity

Dielectrics

Sensors

Antennas

Environmental sensing

Network security

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