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Robust FDTD Modeling of Graphene-Based Conductive Materials with Transient Features for Advanced Antenna

Pablo H Zapata Cano1, Stamatios Amanatiadis1, Zaharias D Zaharis1

  • 1School of Electrical and Computer Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.

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|February 11, 2023
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Summary

This study introduces a new method for modeling graphene materials in transient simulations, enabling the design of a novel graphene-oxide antenna. This advancement allows for enhanced antenna performance and real-time sensing applications.

Keywords:
FDTD methodsgas sensinggraphenegraphene oxide antennatransient phenomena

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Area of Science:

  • Electromagnetics and Materials Science
  • Computational Physics

Background:

  • Accurate modeling of frequency-dispersive materials, like graphene, is difficult with transient methods such as the finite-difference time-domain (FDTD).
  • Graphene's time-varying conductivity presents unique challenges for electromagnetic simulations.

Purpose of the Study:

  • To develop a novel algorithm for modeling graphene-based dispersive materials with time-varying conductivity.
  • To design and analyze a reduced graphene-oxide antenna operating at 6 GHz using the proposed method.
  • To explore the antenna's potential for sensing applications through real-time monitoring.

Main Methods:

  • Implementation of a piecewise linear recursive convolution (PLRC) scheme for transient modeling of graphene.
  • Incorporation of time-varying conductivity into the PLRC scheme.
  • Design and simulation of a 6 GHz reduced graphene-oxide antenna.

Main Results:

  • Successful modeling of frequency-dispersive graphene materials with time-varying conductivity.
  • Demonstration of a 6 GHz reduced graphene-oxide antenna.
  • Analysis of transient responses to conductivity variations and proposed enhancement strategies.
  • Validation of the antenna for real-time voltage variation monitoring in sensing applications.

Conclusions:

  • The developed PLRC scheme effectively models graphene's dispersive and time-varying properties.
  • The reduced graphene-oxide antenna shows promise for enhanced performance and versatile sensing applications.
  • Exploiting graphene's time-varying conductivity offers a new pathway for antenna design and optimization.