Towards Washable Wearable Antennas: A Comparison of Coating Materials for Screen-Printed Textile-Based UHF RFID Tags

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr class="thead"><td align="left">Coating</td><td align="center">Effect of soaking cycle on realised gain</td><td align="center">Notes</td></tr><tr><td class="thead-hr" colspan="3"><hr/></td></tr><tr><td align="left">Epoxy</td><td align="center">N/A</td><td align="center">No data, all the tags had broken t-match</td></tr><tr><td align="left">Acrylic</td><td align="center">−0.5 dB</td><td align="center"> </td></tr><tr><td align="left">Silicone</td><td align="center">+1 dB</td><td align="center"> </td></tr><tr><td align="left">Latex</td><td align="center">−2 dB</td><td align="center"> </td></tr><tr><td align="left">PVA1</td><td align="center">−1 dB</td><td align="center">Dissolves in water, rejected</td></tr><tr><td align="left">PVA2</td><td align="center">−3 dB</td><td align="center">Partially dissolves, potentially could wear out in repeated washing</td></tr><tr class="table-tr"><td colspan="3"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

International Journal of Antennas and Propagation

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Table 4

Table 4: Towards Washable Wearable Antennas: A Comparison of Coating Materials for Screen-Printed Textile-Based UHF RFID Tags 