Design of Graphene-Based Tunable Plasmonic Antenna for Multiband Terahertz Application Systems.

This article presents a systematic technique for designing a novel multiband plasmonic antenna based on graphene with a silicon nitride (SiO3N4) dielectric substrate in the terahertz band frequencies. Higher conductivity values are found in the 1–5 THz ranges when the graphene conductivity values are measured at these band frequencies. Based on this, graphene chemical potential (μc) values between 0.0 and 1.0 eV are implemented to derive the fundamental antenna parameters. According to the simulated results, the proposed antenna operates at dual-band frequencies when μc is less than 0.3 eV and at triple-band frequencies when it is greater than that. Furthermore, for terahertz applications, the chemical potential value of 0.5 eV appears more reliable as the suggested antenna is operated at a tri-band frequency of 0.855, 3.760, and 4.650 THz with a gain of 3.06, 7.65, and 7.53 dB and fraction bandwidth of 32.4%, 5.21%, and 4.24%, respectively. Furthermore, the advancement of the current work was evident when comparing the obtained results with those previously achieved by other researchers, particularly in terms of antenna size, gain, and bandwidth values. Finally, it can be concluded that the recommended antenna offers good frequency tunable features and is suitable for high-speed indoor wireless applications. [ABSTRACT FROM AUTHOR]