Specific Absorption Rate Analysis of a WLAN antenna using Slotted I-type electromagnetic bandgap (EBG) structure

Abstract

In this paper on body investigation has been done on microstrip patch antenna using Velcro as a substrate at 2.4 GHz and different parameters (gain, directivity, efficiency) were watched. Alongside this the estimation of SAR (Specific Absorption Rate) has been measured averaged over the 10 g of tissue. Gain and directivity were extraordinarily influenced in view of ingestion of radiation by the human body with efficiency of 40.81% while the estimation of SAR is 4.63 W/kg which is beyond the safe level of 2 W/kg as indicated by European IEC Standard. Slotted I Metamaterial surface is utilized as a ground plane for Microstrip patch antennadue to which the SAR is decreased from 4.63 W/kg to 1.23 W/kg i.e. 73.43% diminishment in SAR as indicated by the standard which is in the protected zone. In addition ithas enhanced the efficiency from 40.81% to 41.35%.This is because of its two important properties of suppressing the surface waves and in phase reflection. Simulations are accomplished in CST MWS.