Macroscopic Modeling of Anomalously Reflecting Metasurfaces: Angular Response and Far-Field Scattering

A. Diaz-Rubio, S. A. Tretyakov

Research output: Contribution to journalArticleScientificpeer-review

40 Citations (Scopus)
100 Downloads (Pure)

Abstract

In view of extremely challenging requirements on the design and optimization of future mobile communication systems, researchers are considering the possibilities of creating intelligent radio environments by using reconfigurable and smart metasurfaces integrated into walls, ceilings, or facades. In this novel communication paradigm, tunable metasurfaces redirect incident waves into the desired directions. To design and characterize such smart radio environments in any realistic scenario, it is necessary to know how these metasurfaces behave when illuminated from other directions and how scattering from finite-sized anomalous reflectors can be estimated. In this work, we analyze the far-field scattering of reflective metasurfaces and study the angular response of anomalous reflectors for arbitrary illumination angles. Using the surface-impedance model, we explain the dependence of the reflection coefficients of phase-gradient metasurfaces on the illumination angle and present numerical examples for typical structures. We also consider scattering from finite-sized metasurfaces and define a route toward including the full-angle response of anomalous reflections into the ray-tracing models of the propagation channel. The developed models apply to other diffraction gratings of finite size.

Original languageEnglish
Pages (from-to)6560-6571
Number of pages12
JournalIEEE Transactions on Antennas and Propagation
Volume69
Issue number10
Early online date2021
DOIs
Publication statusPublished - 1 Oct 2021
MoE publication typeA1 Journal article-refereed

Keywords

  • angular response
  • diffraction grating
  • far-field scattering
  • Impedance
  • Lighting
  • Metasurface
  • Metasurfaces
  • Optical surface waves
  • reflection coefficient
  • Scattering
  • Surface impedance
  • Surface waves

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