Abstract
In this work, we present the impact of graphene layer in conventional copper antenna from microwave to terahertz (THz) by numerical simulations. The use of graphene sheet below the metal radiator as parasitic layer in metal antenna can make easier to tune the resonance frequency using electric field effect via DC bias voltage. The graphene has a variable conductivity, which can be increased with the increases of chemical potential by the application of external DC voltage. However, graphene has moderate conductivity with poor tunability in the microwave frequency range and excellent conductivity with good tunability in the THz frequency range. Due to poor tunability conductivity effect of graphene in microwave frequencies, there is no more frequency reconfiguration of microwave copper antenna with variation of graphene chemical potential. THz copper antenna enables frequency reconfiguration with variation of graphene chemical potential, because of good tunability conductivity effect of graphene in THz frequencies.
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