Abadal, S.; Llatser, I.; Mestres, A.; Lee, H.; Alarcon, E.; Albert Cabellos-Aparicio IEEE transactions on communications Vol. 63, num. 4, p. 1470-1482 DOI: 10.1109/TCOMM.2015.2406691 Data de publicació: 2015-02-24 Article en revista
Graphene is enabling a plethora of applications in a wide range of fields due to its unique electrical, mechanical, and optical properties. Among them, graphene-based plasmonic miniaturized antennas (or shortly named, graphennas) are garnering growing interest in the field of communications. In light of their reduced size, in the micrometric range, and an expected radiation frequency of a few terahertz, graphennas offer means for the implementation of ultra-short-range wireless
communications. Motivated by their high radiation frequency
and potentially wideband nature, this paper presents a methodology
for the time-domain characterization and evaluation of
graphennas. The proposed framework is highly vertical, as it
aims to build a bridge between technological aspects, antenna
design, and communications. Using this approach, qualitative
and quantitative analyses of a particular case of graphenna are
carried out as a function of two critical design parameters,
namely, chemical potential and carrier mobility. The results
are then compared to the performance of equivalent metallic
antennas. Finally, the suitability of graphennas for ultra-shortrange
communications is briefly discussed.
Llatser, I.; Albert Cabellos-Aparicio; Alarcon, E.; Jornet, J.M.; Mestres, A.; Lee, H.; Solé-Pareta, J. IEEE transactions on communications Vol. 63, num. 1, p. 324-333 DOI: 10.1109/TCOMM.2014.2379271 Data de publicació: 2015-01-01 Article en revista
Graphene is a promising material which has been proposed to build graphene plasmonic miniaturized antennas, or graphennas, which show excellent conditions for the propagation of Surface Plasmon Polariton (SPP) waves in the terahertz band. Due to their small size of just a few micrometers, graphennas allow the implementation of wireless communications among nanosystems, leading to a novel paradigm known as Graphene-enabled Wireless Communications (GWC). In this paper, an analytical framework is developed to evaluate how the channel capacity of a GWC system scales as its dimensions shrink. In particular, we study how the unique propagation of SPP waves in graphennas will impact the channel capacity. Next, we further compare these results with respect to the case when metallic antennas are used, in which these plasmonic effects do not appear. In addition, asymptotic expressions for the channel capacity are derived in the limit when the system dimensions tend to zero. In this scenario, necessary conditions to ensure the feasibility of GWC networks are found. Finally, using these conditions, new guidelines are derived to explore the scalability of various parameters, such as transmission range and transmitted power. These results may be helpful for designers of future GWC systems and networks.