Graphene and its Nanocomposites based Microwave Non-Invasive Patch Applicators for Maximum Power Localization

The design of a non-invasive patch applicator using graphene and its nanocomposites is proposed here to address the issues of localized power deposition in the target site, faster heat generation and specific penetration depth. The graphene material and its nanocomposites, such as graphene oxide (GO) and reduced graphene oxide (RGO) offer several benefits when employed as an absorber at microwave frequencies. The nanomaterial strip when placed on a side layer of the patch applicator controls the radiation pattern of the antenna hence providing significant improvement in directivity and reduction of sidelobe power levels. Initially, the graphene and its nanocomposites-based patch applicators have been designed and performance enhancement of hyperthermia treatment planning is validated from the plots of maximum power deposition and specific absorption rate (SAR). Further, it is demonstrated that RGO based microwave patch applicators outperform with a maximum power deposition and SAR value of 30.1 W/cm
³
, and 113.4 W/Kg respectively. The realization of nanomaterial based patch applicator design in terms of faster heat generation is demonstrated by obtaining maximum temperature of 319° K in 10 minutes for RGO nanocomposite.