Abstract
The design and manufacturing of several new textile-based rectangular-ring antennas for body area networks operating in the ISM-band (2.4 GHz-2.4835 GHz) is described. Fleece fabric is applied as antenna substrate, whereas the conducting antenna plane and ground plane are constructed based on a commercially available electrotextile called Flectron. We compare the characteristics of two prototypes that were assembled using different glueing techniques. The influence of bending on the characteristics is investigated. The proposed antennas are the first circularly polarised antennas that cover a bandwidth of more than 190 MHz, using a substrate material with a thickness less than 3 mm. The antennas provide sufficient antenna gain for use in practical wireless links. They allow direct integration into garments.
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