Metasurface Antennas: Efficiency versus Bandwidth

Bodehou, Modeste;Faenzi, Marco;Gonzalez-Ovejero, David;Maci, Stefano;Martini, Enrica;et.al.
(2021) 15th EuCAP Conference 2021 — Location: Düsseldorf (Germany) (22.March.2021)

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Authors
  • Bodehou, ModesteUCLouvain
    Author
  • Faenzi, MarcoDepartment of Information Engineering and Mathematics, University of Siena, 53100 Siena, Italy
    Author
  • Gonzalez-Ovejero, DavidUniv Rennes, CNRS, Institut d’ ´ Electronique et de T´el´ecommunications de Rennes, UMR 6164, 35000 Rennes, France
    Author
  • Maci, StefanoDepartment of Information Engineering and Mathematics, University of Siena, 53100 Siena, Italy
    Author
  • Craeye, ChristopheUCLouvain
    Author
  • Martini, EnricaDepartment of Information Engineering and Mathematics, University of Siena, 53100 Siena, Italy
    Author
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Abstract
Two methods are proposed for the accurate and fast analysis of the efficiency of arbitrarily modulated metasurface (MTS) antennas. The surface current on the MTS is expanded into entire-domain basis functions. The first method uses a Fourier-Bessel basis and relies on the Poynting theorem, while the second approach is based on the calculation of the surfacewave residue with a Gaussian-Ring expansion for the current. Both methods allow one to compute the efficiency of MTS antennas in a few minutes, which represents a drastic reduction of the computation time in comparison with any commercial software. The algorithms are then used to analyze the frequency dependence of the efficiency of MTS antennas in two different cases: 1) anisotropic MTS with uniform periodicity, 2) anisotropic MTS with non-uniform periodicity. The latter case corresponds to an active region MTS and provides a larger bandwidth. Validation with commercial software and measurements data is provided.
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Bodehou, M., Faenzi, M., Gonzalez-Ovejero, D., Maci, S., Craeye, C., & Martini, E. (2021). Metasurface Antennas: Efficiency versus Bandwidth. Proceedings of the 15th EUCAP Conference 2021, 5. https://hdl.handle.net/2078.5/223079