Absorption of High-Frequency Power by Using Graphene Films

Abstract

As a result of the growing use of wireless communication devices, high-frequency noise issues are becoming increasingly important. In this study, a graphene film is utilized as a high-frequency power absorber. Epoxy is mixed with the graphene to adjust its conductivity. The graphene film is deposited onto a microstrip line of FR4 substrates via screen printing technology. Experimental results show that graphene film is with a sheet resistance of 114 Ω/sq and a conductivity of 973 S/m and its power loss reaches 70% at 1.35 GHz.