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International Journal of Antennas and Propagation
Volume 2015, Article ID 424150, 8 pages
http://dx.doi.org/10.1155/2015/424150
Research Article

Towards Washable Electrotextile UHF RFID Tags: Reliability Study of Epoxy-Coated Copper Fabric Antennas

1Department of Electronic Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong
2Department of Electronics and Communications Engineering, Tampere University of Technology, 33720 Tampere, Finland

Received 16 October 2015; Accepted 8 November 2015

Academic Editor: Luciano Tarricone

Copyright © 2015 Shiqi Wang 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 investigate the impact of washing on the performance of passive UHF RFID tags based on dipole antennas fabricated from copper fabric and coated with protective epoxy coating. Initially, the tags achieved read ranges of about 8 meters, under the European RFID emission regulation. To assess the impact of washing on the performance of the tags, they were washed repeatedly in a washing machine and measured after every washing cycle. Despite the reliability challenges related to mechanical stress, the used epoxy coating was found to be a promising coating for electrotextile tags in moist conditions.