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Abstract
The stability of wearable textile antennas after 20 reference washing cycles was evaluated by measuring the reflection coefficient of different antenna prototypes. The prototypes’ conductive parts were screen-printed on several textile substrates using two different silver-based conductive inks. The necessity of coating the antennas with a thermoplastic polyurethane (TPU) coating was investigated by comparing coated with uncoated antennas. It is shown that covering the antennas with the TPU layer not only protects the screen-printed conductive area but also prevents delamination of the multilayered textile fabric substrates, making the antennas washable for up to 20 cycles. Furthermore, it is proven that coating is not necessary for maintaining antenna operation and this up to 20 washing cycles. However, connector detachment caused by friction during the washing process was the main problem of antenna performance degradation. Hence, other flexible, durable methods should be developed for establishing a stable electrical connection.
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Details
1 Ghent University, Department of Textiles, Technologiepark 907, 9052 Zwijnaarde, Belgium; Polytechnic University of Tirana, Department of Textile and Fashion, Square ‘Mother Teresa’, No.4, Tirana, Albania
2 Ghent University, Department of Information Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium; Interuniversity Micro Electronics Center (IMEC), Kapeldreef 75, 3001 Leuven, Belgium
3 3Ghent University, Department of Information Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
4 Ghent University, Department of Textiles, Technologiepark 907, 9052 Zwijnaarde, Belgium
5 Ghent University, Department of Information Technology, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
6 Ghent University, Department of Electronics and Information Systems, Sint-Pietersnieuwstraat 41, 9000 Ghent, Belgium
7 Polytechnic University of Tirana, Department of Textile and Fashion, Square ‘Mother Teresa’, No.4, Tirana, Albania