Highly Directive Graphene Based Hybrid Plasmonic Nanoantenna for Terahertz Applications

Abstract

To satisfy the necessity for elevated data
transmission rates in 5G and beyond networks, terahertz band
communication (0.1 - 10 THz) is envisaged as a crucial wireless
technology. Two-dimensional graphene nanomaterial is being
extensively integrated into the plasmonic antennas as it allows
them to resonate in the terahertz wave spectrum. A graphene
based hybrid terahertz plasmonic nano-scale antenna has been
modeled to acquire a maximum gain and directivity of 8.1 dB and
8.23 dBi, respectively, by varying the conductivity of graphene via
gate bias voltage. Moreover, a combination of several tailored
radiating layers of silver, SiO2 and graphene sheets is arranged in
the proposed nanoantenna in such a way that the return loss (S11)
of -26.595 dB and wider bandwidth of 1241.3 GHz are obtained. It
is evident that the proposed graphene-based hybrid plasmonic
nanoantenna could be considered an ideal candidate for terahertz
communication owing to its excellent radiation characteristics.