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Wearable near‐field communication bracelet based on highly conductive graphene‐assembled films
Author(s) -
Li Siting,
Song Rongguo,
Zhang Bohan,
Huang Bangqi,
Zhao Xin,
He Daping
Publication year - 2021
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.22479
Subject(s) - graphene , materials science , optoelectronics , conductivity , electrical conductor , inkwell , nanotechnology , wearable computer , conductive ink , engraving , bandwidth (computing) , flexibility (engineering) , antenna (radio) , near field communication , computer science , electrical engineering , telecommunications , embedded system , composite material , sheet resistance , engineering , physics , statistics , mathematics , layer (electronics) , quantum mechanics , ultra high frequency
Benefiting from the high conductivity and superb flexibility, graphene‐based materials are promising to replace metal for near‐field communication (NFC) applications. Herein, we report a flexible NFC tag antenna based on high‐conductivity graphene‐assembled films (HCGAFs) and investigate how the performance of the antenna is affected by antenna design and human body effect. The fabricated prototype via a one‐step laser‐direct mold engraving method shows a 10 dB bandwidth of 2.5 MHz centering at 13.70 MHz with a quality factor ( Q ) of 9.19. The maximum read range of the HCGAF NFC tag is measured to be around 7.5 cm, comparable to the commercially available metal NFC tags. Moreover, the flexible nature of HCGAFs guarantees excellent mechanical stability and deformation insensitivity, especially when compared to commercial metal‐based counterparts. We further demonstrate the practical applications of the HCGAF tag as key card and electronic business card in the vicinity of human body.