Wearable microstrip patch antenna with low SAR for WBAN applications

Abstract

The development of intelligent textile systems to raise the degree of protection for the wearer has revealed the need for wearable communication devices and motivated research in textile antennas. In this paper, a new fully textile microstrip patch antenna is designed for a central frequency of 5.8 GHz. a substrate made of polyester and cotton with a dissipation factor of tan = 0.02 and a dielectric constant of 1.6 was employed. Thanks to its high conductivity (0.02 Ohm/cm), the Stick E shield was chosen as a conductor material. The CST simulator version 2018 is used to simulate the suggested conception, and measured by Vector Network Analyzer Master MS2026C, the HFSS software was employed as a comparative tool. For wearable situations in the free medium and on the human body, promising results from simulation and experimental studies are presented. The suggested antenna might possibly be connected to the human body, requiring the calculation of the specific absorption ratio (SAR).Thus, the proposed antenna design permits to attain 0.087 W/kg for 1 g. SAR and 0.0321 W/kg for 10 g. Experimental and numerical results demonstrate excellent performance regarding return loss, VSWR. Finally, our results indicate that the suggested antenna performs as intended when situated within the vicinity of the human body, making it a good candidate for application in wearable technologies.