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Efficient 2-D leaky-wave antenna configurations based on graphene metasurfaces

Published online by Cambridge University Press:  09 May 2017

Walter Fuscaldo ,
Paolo Burghignoli ,
Paolo Baccarelli  and
Alessandro Galli
Walter Fuscaldo*
Affiliation:
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy. Phone: +39 320 7858896 Institut d’Électronique et de Télécommunications de Rennes 1, UMR CNRS 6164 Université de Rennes 1, 35000 Rennes, France
Paolo Burghignoli
Affiliation:
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy. Phone: +39 320 7858896
Paolo Baccarelli
Affiliation:
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy. Phone: +39 320 7858896
Alessandro Galli
Affiliation:
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, 00184 Rome, Italy. Phone: +39 320 7858896
*
Corresponding author: W. Fuscaldo Email: walter.fuscaldo@uniroma1.it
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Abstract

Different configurations of leaky-wave antennas (LWAs) based on graphene metasurfaces are studied. The electronic properties of a graphene metasurface in the low THz range are investigated in details in order to discuss the reconfigurability features of the presented structures. Simple exact formulas for evaluating the ohmic losses related to the surface plasmon polariton (SPP) propagation along a suspended graphene sheet, and the relevant figures of merit of SPP propagating over a generic metasurface are given. Such formulas allow us to explain the low efficiency of reconfigurable antennas based on SPPs along graphene metasurfaces. Then, the radiative performance and relevant losses of graphene Fabry–Perot cavity antennas (FPCAs) based on non-plasmonic leaky waves (LWs) are investigated and compared with previous solutions based on SPPs. In particular, a single-layer structure, i.e. a grounded dielectric slab covered with a graphene metasurface, and a multilayered structure, i.e. a substrate–superstrate antenna in which the graphene metasurface is embedded at a suitable position within the substrate, are considered in detail. The results show that the proposed LW solutions in graphene FPCAs allow for considerably reducing the ohmic losses, thus significantly improving the efficiency of the proposed radiators.

Keywords

Antenna designModeling and measurementsNew and emerging technologies and materialsLeaky-wave antennas
Type
Research Papers
Information
International Journal of Microwave and Wireless Technologies , Volume 9 , Special Issue 6: EuMW 2016 Special Issue , July 2017 , pp. 1293 - 1303
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2017 

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