Now a day’s importance of wearable textiles in the antenna segment has been increased due to the recent miniaturization of wireless devices. A wearable antenna is stands as a part of the clothing used for communication purposes, which includes tracking and navigation, mobile computing, public safety and wireless communication. By using Wireless Body Sensor Networks for healthcare and pervasive applications, the design of wearable antennas offers the possibility of ubiquitous monitoring, communication and energy harvesting and storage. Basic requirements for wearable antennas are a planar structure and flexible construction materials. Material’s several properties influence the working of the antenna. The permittivity and the thickness of the substrate determine the efficiency and band width of a planar microstrip antenna. This paper is mainly focused on the dielectric properties of normal fabrics. In general, textiles present a very low dielectric constant that reduces the surface wave losses and increases the impedance bandwidth of the antenna. Textile fabrics are porous and compressible materials whose thickness and density might change with low pressures. Therefore, it is important to know how these characteristics influence the behaviour of the antenna in order to minimize unwanted effects.Keywords: Wearable Antenna, textile materials, fibre, loss factor
