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International Journal of Antennas and Propagation
Volume 2017 (2017), Article ID 1386017, 5 pages
https://doi.org/10.1155/2017/1386017
Research Article

3D-Printed Graphene Antennas and Interconnections for Textile RFID Tags: Fabrication and Reliability towards Humidity

BioMediTech Institute and Faculty of Biomedical Sciences and Engineering, Tampere University of Technology, P.O. Box 692, 33101 Tampere, Finland

Correspondence should be addressed to Han He

Received 7 April 2017; Accepted 15 May 2017; Published 5 June 2017

Academic Editor: Sanming Hu

Copyright © 2017 Han He et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present the possibilities of 3D direct-write dispensing in the fabrication of passive UHF RFID graphene tags on a textile substrate. In our method, the graphene tag antenna is deposited directly on top of the IC strap, in order to simplify the manufacturing process by removing one step, that is, the IC attachment with conductive glue. Our wireless measurement results confirm that graphene RFID tags with printed antenna-IC interconnections achieve peak read ranges of 5.2 meters, which makes them comparable to graphene tags with epoxy-glued ICs. After keeping the tags in high humidity, the read ranges of the tags with epoxy-glued and printed antenna-IC interconnections decrease 0.8 meters and 0.5 meters, respectively. However, after drying, the performance of both types of tags returns back to normal.