Journal
NANOMATERIALS
Volume 12, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/nano12091395
Keywords
liquid metamaterial; temperature sensing; quality factor; figure-of-merit
Categories
Funding
- National Natural Science Foundation of China [61701082, 61971113, 61901095]
- National Key RD Program [2018YFB1802102, 2018AAA0103203]
- Guangdong Provincial Research and Development Plan in Key Areas [2019B010141001, 2019B010142001]
- Sichuan Provincial Science and Technology Planning Program of China [2020YFG0039, 2021YFG0013, 2021YFH0133, 2022YFG0230]
- Yibin Science and Technology Program-Key Projects [2018ZSF001, 2019GY001]
- Intelligent Terminal Key Laboratory of Sichuan Province [SCITLAB-0010]
- Guangxi Key Laboratory of Wireless Wideband Communication and Signal Processing [GXKL06200209]
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This paper presents an Hg-EIT-like metamaterial unit block that combines the high Q-factor feature of an EIT-like metamaterial unit and the large temperature-sensing sensitivity performance of liquid metals to achieve a high FOM, addressing the precision issue of metamaterial temperature sensors.
High-performance temperature sensing is a key technique in modern Internet of Things. However, it is hard to attain a high precision while achieving a compact size for wireless sensing. Recently, metamaterials have been proposed to design a microwave, wireless temperature sensor, but precision is still an unsolved problem. By combining the high-quality factor (Q-factor) feature of a EIT-like metamaterial unit and the large temperature-sensing sensitivity performance of liquid metals, this paper designs and experimentally investigates an Hg-EIT-like metamaterial unit block for high figure-of-merit (FOM) temperature-sensing applications. A measured FOM of about 0.68 is realized, which is larger than most of the reported metamaterial-inspired temperature sensors.
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