Textile Material Substrate based Wearable Microstrip Patch Antenna for Wireless Applications

Abstract

In this paper a compact microstrip patch antenna having operating frequency of 2.45 GHz is analysed. Glass shaped patch geometry is used with partial ground plane for wider bandwidth coverage. The proposed antenna has a low-profile structure of 32mm

× 40 mm and hence can be easily integrated into wearable devices. The substrate of antenna is designed with the help of textile materials such as Curtain Cotton, Denim, Fleece, Felt and polyester, while the conducting layers are made from copper foil tape (CFT). Specific Absorption Rate (SAR) analysis of all designed antennas is performed to ensure the use of antenna in the vicinity of human body. Bending analysis of antenna is performed to determine influence of antenna around its performance parameters in different parts of body for wireless body-area network (WBAN) scenarios. Measured results obtained from VNA showed good match with simulated results in terms of resonant frequency, return loss, bandwidth and gain. The antenna designed using denim substrate achieved maximum bandwidth of 770 MHz, 2.39 dB gain and -16.1 dB value of S11 parameter. Voltage Standing Wave Ratio (VSWR) for all five antennas is less than 2. Hence Denim based proposed antenna can be a suitable candidate of wearable as well as wireless applications.