Studies on a Fabric Feed Line Sewn to a Flexible Slot Antenna

Authors: Kazuhiro Fujiwara, Hitoshi Shimasaki, Kazunari Morimoto

Source: FERMAT, Volume 16, Communication 1, Jul.-Aug., 2016

Abstract: A cavity-backed slot antenna (CBSA) made of conductive textiles was fabricated with a polyester fabric feed line and evaluated in bending tests. The substrate of the feed line was also a textile sheet rather than conventional material in order to make the antenna more flexible. The feed line was sewn directly to the CBSA to eliminate the gap between the feed line and the antenna. The reflection and radiation characteristics in the 2.4-GHz band were measured for two types of fixing methods: sewn and fixed with adhesive tape. And then, the characteristics of both antennas were compared when they were bent. The -10dB bandwidth for the sewn antenna was wider than for the taped antenna. Thus, the antenna characteristics can be improved by reducing unnecessary deformation of the feed line and the antenna.

Keywords: Conductive textile, microwave, cavity-backed slot antenna, feed line, polyester fabric, flexibility

View PDF

Studies on a Fabric Feed Line Sewnto a Flexible Slot Antenna