Multimode scattering matrix optimisation for the mitigation of harmonics in anomalous reflection metasurfaces

Elineau, Matthieu; Loison, Renaud; Méric, Stéphane; Gillard, Raphaël; Pagani, Pascal; Maze-Merceur, G.; Pouliguen, Philippe

doi:10.23919/eumc50147.2022.9784391

Cited by 1 publication

(2 citation statements)

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“…which is the generalized reflection law, written in (1), where θ m is the intended reflection direction after an illumination in the θ 0 direction. Performing anomalous reflection, with the help of the generalized reflection law, while setting the structure periodicity equal to the gradient periodicity is strictly equivalent to satisfy the m = 1 Floquet mode propagation condition.…”

Section: Expected Behaviormentioning

confidence: 99%

“…Metasurfaces [1,2] have made possible a great quantity of electromagnetic wavefront manipulation types over the last decade [3]. In the field of radar, they spread their capabilities over various applications such as camouflaging techniques or radar cross-section (RCS) reduction [4,5], backscattering enhancement [6], or anomalous reflection [7,8].…”

Section: Introductionmentioning

confidence: 99%

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RCS prediction and optimization for anomalous reflection metasurfaces using Floquet analysis

Elineau

Loison

Méric

et al. 2023

Int. J. Microw. Wireless Technol.

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Due to their periodic nature, metasurfaces used to perform anomalous reflection raise parasitic harmonic reflections. We show a classical synthesis example of such a structure and highlight its limitations. Floquet analysis and its associated simulation environment are exploited to understand the origin of these parasitic reflections and to mitigate them. The proposed method is based on the optimization of the metasurface periodic pattern: the supercell. A predictive method is built to calculate radar cross-section patterns from supercell Floquet simulation, avoiding dealing with heavy simulations. The proposed model, the optimization outputs, and the general results are exposed in details. Different cases are also discussed to prove the repeatability of the proposed method. An earlier version of this paper was presented at the European Microwave Conference and was published in its proceedings.

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Section: Expected Behaviormentioning

confidence: 99%