Circularly Polarized Metamaterial Based Fractal Wearable Antenna for Wireless Applications

Abstract

The design of wearable fractal antenna on the spiral shaped Metamaterial (MTM) substrate suitable for Industrial, Scientific and Medical (ISM) (2.4-2.45GHz) frequency bands is presented in this paper. To reduce the SAR value a spiral metamaterial meander is introduced in the ground plane. High-Frequency Structure Simulator (HFSS) software was used to design the antenna. Maximum allowedSpecific Absorption Rate (SAR) value is 1.6 W/Kg which indicates that the wearable antennas are safe for human. Jeans substrate is used to design the antenna. The reflection coefficient of the antenna is -27 dB and the Voltage Standing Wave Ratio (VSWR) of the antenna is 1.05. The SAR value of the proposed antenna when placed on Phantom neck is 0.78 W/Kg, which makes it suitable for wearable applications.