Graphene as a Shielding Material for SAR Reduction in Human Head using Rectangular and Circular Patch Antenna

摘要

Nanomaterials pave the way for better performance in wireless applications due to their unique properties. Nowadays, these have been used as shield material in dipole antennas for a solution of reduction in SAR value. This work proposes the use of emerging graphene nanomaterial by comparing the performance for two different shapes of patch antenna namely rectangular and circular patch. With the growth in technology, the protection of human health is also mandatory so the work is planned to use graphene as a shielding material for SAR reduction in the human brain and it is proved that for rectangular and circular patch applicators it attains the minimum value of SAR as 0.35 W/Kg and 0.17 W/Kg respectively. Also, antenna parameters using the reconfigurable property of graphene at microwave frequencies are estimated and observed that gain of 8.74 dB and return loss value of -22 dB is achieved for circular patch antenna and gain of 4.28 dB and return loss value of -18 dB is obtained for rectangular patch antenna. The results validate good performance in terms of radiation efficiency and minimum SAR value in comparison to the previously used antennas for shielding purposes.