Open AccessAnalysis of the power transfer and electrical performances of an embroidered textile loop antenna for near field communication (NFC) application
Author(s) -
Baptiste Garnier,
François Rault,
Philippe Mariage,
Savvas Vassiliadis,
Nikos Stathopoulos,
Stelios Α. Mitilineos,
Cédric Cochrane,
Vladan Konkar
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/827/1/012030
Subject(s) - antenna (radio) , electromagnetic coil , electrical engineering , inductance , electrical conductor , wireless power transfer , textile , acoustics , contact resistance , maximum power transfer theorem , mechanical engineering , power (physics) , materials science , engineering , voltage , composite material , physics , quantum mechanics , layer (electronics)
We present a new class of wearable textile antenna and analyse their performances through an electrical study. The developed prototypes have been realized by an embroidery process and are made of conductive twisted copper/polyester yarns on a cotton substrate. These antennas aim to transfer power and data thanks to the NFC technology, so the operating frequency is 13.56MHz and the maximal reading distance is around 10cm. The strong resistance of the yarn (4.20Ω/m) make us overlap three yarns to reach satisfactory electrical characteristics. Antennas are composed of a textile plan circular coil to which we add a usual capacitor. The study of coils electrical characteristics highlights a linear evolution of coil resistance and inductance in function of embroidery geometrical parameters. Also, these data show the feasibility of such antennas, especially through quality factor values reaching 45.