Performance Analysis of Textile Substrates adopted in Wearable Antennas: A Review

This article is presented with the review of various textile substrates material that has been utilized in designing wearable textile antennas. The existing review articles presented had analysed several frequently used textile substrates like Jeans, Denim and Cotton. In this article, the performances of peculiar textile substrates like Silk, PF4 foam, Polyester, Felt and other unique substrates like Polydimethylsiloxane (PDMS), Polytetrafluoroethylene (PTFE), Tween, Lycra, etc. are studied in detail through the significant parameters of textile antenna such as gain, radiation efficiency and Specific Absorption Rate (SAR) value. For detailed analogy, along with these substrates several frequently used substrates like Denim, Jeans, Cotton and Polymide are also considered. After comparison of various textile substrates in recent research articles, it is noted that Felt exposes excellent performance in ISM band. The maximum gain and radiation efficiency exhibited by the Felt material in ISM band is 9.2dBi and 83% respectively; minimum SAR value obtained by the Felt material is 0.014 W/Kg for one gram capacity of tissue and 0.47 W/Kg for ten gram capacity of tissue which is under the limit according to standards.