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The equivalent circuit model for electrostatic and magnetostatic biased tunable graphene as the absorption material

Graphene is being proposed as a new nano material for EMC shielding and absorption due to its tunable resistive characteristics. The surface conductivity of graphene can be flexibly tuned by the electrostatic and magnetostatic bias applied on the graphene surface. Hence, its absorption and radiation characteristics of graphene are changed accordingly. The static electric bias applied on the graphene patch can change the chemical potential and the surface conductivity of graphene. The static magnetic field can make the conductivity a dispersive and anisotropic tensor, which complicates most modeling methodologies. In this paper, a novel equivalent circuit model is proposed for graphene with the electrostatic and magnetostatic bias, respectively. It employs the equivalent circuit model that is derived from the electric field integral equation to analyze the wave propagation and absorption through graphene. It provides a general modeling approach for graphene's applications as the EMC materials.