A Wearable, Low-Profile, Fractal Monopole Antenna Integrated with a Reflector for Enhancing Antenna Performance and SAR Reduction

In this paper, we propose and experimentally realize a low-profile, lightweight, flexible, fully textile, fractal-based monopole antenna integrated with a reflector for enhancing antenna performance and specific absorption rate (SAR) reduction in the human body. The proposed antenna shows a simulated bandwidth of 130 MHz (from 2.37 to 2.50 GHz) in the free space (FS) and 128 MHz (from 2.36 to 2.49 GHz) when it is mounted directly on a flat homogeneous phantom, which cover the targeted Industrial, Scientific, and Medical (ISM) band. High radiation efficiency (greater than 74 % in the FS and greater than 70% on a phantom in the ISM band), is combined with a low maximum 10 g averaged SAR of 0.0971 W/kg at net input power 0.1 W, so the proposed antenna can be a good candidate for use in the wearable devices.