Journal
TEXTILE RESEARCH JOURNAL
Volume 88, Issue 8, Pages 913-921Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/0040517517690626
Keywords
conductive thread; textile coil; embroidered antenna; wireless power transfer; magnetic resonance
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The paper presents a wearable textile antenna embroidered on a fabric for wireless power transfer systems. A planar spiral coil was generated with the conductive thread on a cotton substrate, and was connected to a rectifier circuit fabricated on flexible polyethylene terephthalate film to constitute a bendable receiver by the magnetic resonance. At a resonance frequency of 6.78MHz, the proposed system could achieve -5.51dB transfer efficiency and 12.75 mW power transmission at a distance of 15cm. It was also demonstrated that the resonance frequency and transmitted power of the proposed system could be maintained as the same even when the system was bent conformingly to the surface curvature of the human body model for a bending radius up to 50mm or larger.
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