Shielding Effectiveness of Ideal Monolayer Graphene in Cylindrical Configurations With the Method of Auxiliary Sources

Electromagnetic shielding is one of the most important branches of Electromagnetic Compatibility. Traditionally, metals were commonly used for shielding materials due to their high conductivity. Recently, however, increasing needs have emerged for lightweight, flexible, optical transparent, non-corrosive shielding materials to be used in flexible electronics, aerospace, and automotive manufacturing. For these reasons, carbon-based materials, such as graphene, have attracted increased attention for shielding applications. The main objective of this work is to evaluate ideal monolayer graphene as a shielding material for cylindrical configurations in the RF/microwave region. The numerical modeling of the involved structures is performed by the Method of Auxiliary Sources (MAS). Particularly, since the standard MAS suffers from numerical difficulties when applied in highly-conductive regions, a modified version of MAS is employed in which the graphene layer is replaced by an Impedance Matrix Boundary Condition (IMBC). The same condition is also applied for the case of a Few Layer Graphene (FLG) shield. The derived numerical results are found to be in excellent agreement with those obtained by FEM-based commercial software.