Suppression of Surface Currents at Microwave Frequency Using Graphene-Application to Microwave Cancer Treatment
Abstract
In this work we consider the problem of surface currents suppression
using graphene in the context of microwave cancer treatment. Most of the
research on graphene has been focused on its applications at terahertz
frequencies, and not at microwave frequencies. The use of microwave
cancer ablation technique using a coaxial slot antenna is being limited
because of the existence of surface currents which lead to the heating
of the healthy tissues along its outer surface. In this work we propose
to use graphene which is a single-atom sheet of carbon, as a solution to
prevent the propagation of surface currents on the outer conductor of
the coaxial antenna. We show that by properly designing and tuning the
conductivity of the graphene layer, we can not only suppress the surface
currents, but also control the amount of energy deposited in the
surrounding tissue.
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