Metasurface Loaded Multi-Port Tunable Silicon-Graphene built Nano Antenna in THz Regime with Low-RCS and Low-Coupling Features

The design of a two-terminal antenna with decreased radar cross section (RCS) characteristics and polarization variety is shown in this work. By using stair-aperture feed to excite a cylindrical silicon rod, circular polarization is accomplished. An aperture arrangement that is mirror-oriented between terminal-1 and 2 improves isolation by 30 dB. A frequency selective surface based on a split-ring resonator (SRR) is positioned between and around the twin ports in order to reduce monostatic RCS (MRCS). The radiator functions between 2.45 and 3.35 THz, with a 3-dB axial ratio between 2.65 and 3.15 THz. In the operational band, the MRCS is lowered by around 30 dBsm. The suggested design is well suited for radar applications in THz regime due to its broadside radiation and advantageous diversity characteristics.