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Graphene Microstrip Patch Ultrawide Band Antennas for THz Communications

Dashti, M and Carey, James (2018) Graphene Microstrip Patch Ultrawide Band Antennas for THz Communications Advanced Functional Materials, 28 (11), 1705925.

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Abstract

Future generation local communication systems will need to employ THz frequency bands capable of transferring sizable amounts of data. Current THz technology via electrical excitation is limited by the upper limits of device cutoff frequencies and by the lower limits of optical transitions in quantum confined structures. Current metallic THz antennas require high power to overcome scattering losses and tend to have low antenna efficiency. We show here via calculation and simulation that graphene can sustain electromagnetic propagation at THz frequencies via engineering the intra- and interband contributions to the dynamical conductivity to produce a variable surface impedance microstrip antenna with a several hundred GHz bandwidth. We report the optimization of a circular graphene microstrip patch antenna on silicon with an optimized return loss of -26 dB, a -10 dB bandwidth of 504 GHz and an antenna efficiency of -3.4 dB operating at a frequency of 2 THz. An improved antenna efficiency of -0.36 dB can be found at 3.5 THz but is accompanied by a lower bandwidth of about 200 GHz. Such large bandwidths and antenna efficiencies offers significant hope for graphene based flexible directional antennas that can be employed for future THz local device-to-device communications.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Dashti, M
Carey, JamesDavid.Carey@surrey.ac.uk
Date : 15 January 2018
Funders : EPSRC
Identification Number : 10.1002/adfm.201705925
Copyright Disclaimer : This is the peer reviewed version of the following article: M. Dashti, J. D. Carey, Adv. Funct. Mater. 2018, 1705925. https://doi.org/10.1002/adfm.201705925, which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1002/adfm.201705925/full. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Uncontrolled Keywords : graphene antennas, ultrawide band antennas, THz communications, dynamical conductivity, antenna modeling
Depositing User : Melanie Hughes
Date Deposited : 23 Jan 2018 10:21
Last Modified : 23 Mar 2018 12:56
URI: http://epubs.surrey.ac.uk/id/eprint/845666

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