Frequency reconfigurable circularly polarized high-gain graphene-silicon-based two-port array antenna for THz wireless applications

A frequency agile graphene-silicon ceramic-based dual-port radiator is structured and examined in this communication. Aperture is utilized to feed the silicon ceramic and 3-dB power divider is utilized to convert it into the array structure. Magnetic dipole-built feeding structure creates the HEM_11δ mode inside the silicon ceramic. The main features of designed radiator are: (i) designing of array structure improves the gain to 8.9 dBi; (ii) asymmetrical stair-shaped aperture stimulated CP waves in between the working band; (iii) by changing the chemical potential of graphene, the designed antenna acts as frequency reconfigurable; and (iv) an introduction of polarization diversity concept improves the isolation level to more than 25 dB. CST-MWS and HFSS EM simulators confirm that the proposed radiator works between 2.44 and 2.84 THz with a 3-dB axial ratio from 2.55 to 2.72 THz. Stable radiation properties and good diversity parameters make the radiator suitable for various applications in the THz regime.