Frequency Scanning Graphene Antennas with Plasmonic Control of the Radiation Pattern and Polarization of THz and IR Radiation

Using the CST MWS 2023 software package, the controllability of the characteristics (elements of the scattering matrix and radiation patterns) of reconfigurable plasmonic antennas based on rectangular graphene nanoribbons on metallized (PGA MS) and dielectric (PGA DS) substrates has been modeled and the results of frequency scanning have been obtained at the resonance frequencies of the fundamental and higher modes of surface plasmon-polaritons with a change in the chemical potential of graphene in the terahertz (THz) and far- and mid-IR ranges. The possibility of forming a multibeam PGA MS radiation patterns on plasmon resonances of the surface plasmon-polariton second-order mode in the far- and mid-IR ranges has been investigated. The possibility of radiation of the waves of two orthogonal polarizations by the PGA DS has been shown and methods for controlling the polarization of the THz and IR PGA radiation have been identified, which are based on the selection of the operating frequencies corresponding to the surface plasmon-polariton mode resonances at the p- and s-polarization of the exciting waves and metallization of the dielectric substrate.