Lightweight and Flexible Graphene Film for Millimeter Wave FSS Application

This paper proposes a graphene film based flexible millimeter wave bandstop FSS. The graphene film has good flexibility and low-density of 1.81 g/cm
³
. The proposed graphene FSS works at 60 GHz with the -10 dB bandwidth of 58.33 GHz – 64.83 GHz, which indicates that more than 90% of electromagnetic energy is shielded. Furthermore, to expand the working bandwidth, a double layer graphene FSS with sandwich structure (FSS-Foam-FSS) is designed. The double layer graphene FSS has a wide working bandwidth of 52.78 GHz – 65.21 GHz and good angular stability.