RCS analysis of finite graphene sheets through an enhanced frequency-dependent FDTD method

Graphene is a newly fabricated 2-D material that has attracted much interest due to its potential electronic applications. In this paper, a fully 3-D FDTD-based scheme is proposed for the simulation of electromagnetic interactions with graphene sheets. Graphene´s 2-D character is accounted for by a subcell technique, while its dispersive nature is treated with an auxiliary differential equation algorithm. The computational space is excited by a total-field/scattered-field algorithm and radar cross section diagrams of a finite-size graphene sheet are extracted with the implementation of a near-to-far field scheme. Due to its merits, the proposed model could be utilized for the simulation of real-world graphene structures encountered in more demanding applications.