Graphene based series feed linear array antenna for terahertz short range wireless communication

This research article presents, a design of a graphene-based, octagonal shaped three element series feed terahertz (THz) linear array antenna is designed for very short-distance wireless communication applications. The antenna utilizes a four-layer structure comprising a gold ground plate and patch, with quartz (SiO4) serving as the substrate with a thickness of 140 mu m deposited on the gold ground plate. On this substrate, an octagonal three-element linear array patch made of gold is applied, and finally, a fourth layer of elliptical-shaped graphene, with a thickness of 10 nm, is deposited onto the gold patch plate. The THz linear array antenna demonstrates good performance, with a reflection coefficient value of less than - 10 dB in the 0.285-0.535 THz range, resulting in a substantial 250 GHz bandwidth and the peak realized gain value is 5.25 dBi. Further, the designed antenna employs material switching via change in the chemical potential of graphene to attain pattern reconfigurability and facilitates beam steering capabilities for wireless applications.