Frequency re-configurable metal-graphene hybrid MIMO patch antenna for terahertz communication

Abstract

This paper proposes a novel metal-graphene plasmonic antenna over a Si/SiO2 substrate, working in terahertz frequency band. Novelty of the work lies in the use of metal and graphene as a patch antenna, as this combination enhances the gain & the radiation efficiency of the whole structure. Besides the analysis provides detailing of graphene and its conductivity modelling using MATLAB. The antenna is analyzed using FDTD based CST software, conductivity of graphene used in CST is verified with the conductivity achieved using MATLAB. Further, a 3-element Multiple Input and Multiple Output (MIMO) antenna system using same single element antenna, is designed & analyzed. The metal-graphene hybrid patch antenna provides maximum directivity around 5.8 dBi, maximum gain around 5 dBi, and high radiation efficiency (approx. 80%) at resonant frequency of 1.8 THz. Besides, the 3-element MIMO antenna provides radiation efficiency around 77%, with directivity around 5 dB & diversity gain of around 10 dBi. The proposed metal-graphene hybrid MIMO patch antenna has the potential to be used in advanced THz communication systems.

Graphene-based quad-port MIMO reconfigurable antennas for SATCOM and 5G applications

“…Ideally, the final ECC value should be less than 1. ECC measurement criteria are actually considered Sparameters [4,5,21,24]. The ECC values of both graphene-based quad-port MIMO reconfigurable antenna structures are reported in Figs (7.a) and (8.a), respectively.…”

“…While their values are closer to zero. DG can also be evaluated [4,5,21,24]. In fact, the function of DG is that it caculates and estimates the reduction of transmission capacity.…”

“…The multiple and multi-port capability of this antenna allows networks to simultaneously transmit information through multiple transmitters and receivers, which leads to an increase in network capacity [18][19][20][21][22][23]. In general, the use of graphene-based quad-port MIMO reconfigurable antenna in 5G wireless networks can significantly improve the speed, coverage and capacity of networks and improve the user experience [24][25][26][27][28][29]. The effect of graphene-based quad-port MIMO reconfigurable antenna in SATCOM (satellite communications) is due to the following reasons: 1.…”