A novel tunable patch antenna using graphene stacks array

With the ability of tuning chemical potential, the graphene conductivity can be dynamically adjusted over a wide range. In this paper, we theoretically demonstrate the novel tunable terahertz (THz) tunable patch antenna based on the graphene stacks array. According to the simulation results, the proposed antenna shows a perfect tunability on the reflection coefficient, from 2.8 to 3.4 THz when the chemical potential increase from 0.1 to 0.5 eV. What' more, the gain and directivity of antenna also display a adjusted phenomenon with the chemical potential. And we further discuss the structural parameters of graphene stacks array which also affect the tunable characteristic, and then analyze the results with the distribution of electric field on the top surface of antenna. These results could be very potential applications in other voltage-sensitive devices, tunable sensors and absorbers, switches.