Design and investigation on two port circularly polarized graphene-silicon based MIMO antenna with high isolation for THz wireless applications

In this article, a two-port aperture coupled silicon-graphene based THz radiator is structured and investigated. The focused points of given radiating structure are: (a) a suspended polarization convertor (metasurface) over dual port antenna produces the circular polarized (CP) waves from 5.65 THz to 5.85 THz; (b) designed metasurface also improves the isolation level to more than 30 dB; (c) coating of graphene makes the designed radiator frequency agile; and (d) computational time significantly reduced with the assistant of two different machine learning (ML) techniques i.e. Artificial Neural Network and Random Forest. With the help of CST/HFSS and ML prediction, it is confirmed that the designed antenna works effectively in between 5.1 and 5.9 THz. Stable Far-field patterns and diversity parameters makes the designed radiator suitable for THz based wireless applications.