Checkerboard Electromagnetic Band Gap (Ebg) Structured S-Shaped Antenna for Wearable Applications

Abstract

A miniaturized wearable antenna with a compact EBG with checkerboard structure is designed. The structure is placed on a denim jeans material with thickness of 0.7mmand having dielectric constant of 1.7 and a loss tangent of 0.02. The antenna operates at a frequency of 2.5 GHz and has 0.33GHz bandwidth and 13.2% impedance bandwidth for ISM band applications. The prototype is robust as well as compact and adheres to the wearable applications. The EBG is used to improve the gain and reduces the Specific Absorption Rate (SAR) which is an essential in wearable applications. The gain of 6.5dBi and SAR of 0.0312W/Kg is achieved, satisfying the required conditions of the antenna in the presence and absence of EBG to assess the changes caused in the performance of the antenna due to the insertion of EBG.