A novel three dimensional tunable frequency selective surface based on graphene micro-ribbons

A novel type of three-dimensional (3D) frequency-selective surface (FSS) based on vertical graphene micro-ribbons is demonstrated to realize dynamic tunability of the frequency selectivity. The proposed structure is based on a two-dimensional array of vertical graphene micro-ribbons which are printed on the dielectric substrates with metallic ground planes placed at the bottom. A transmission line model of the proposed FSS is introduced. Additionally, according to the scaling law, the transmission zero frequency can be predicted rapidly and accurately. Based on the combination of the equivalent circuit model and scaling law, the transmission property of the FSS structure is analyzed. Finally, the effect of geometrical parameters on the performance of the FSS is studied.