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Simple Link-Budget Estimation Formulas for Channels Including Anomalous Reflectors
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  • Sergei Kosulnikov ,
  • Cuesta Soto Francisco ,
  • Xuchen Wang ,
  • Sergei Tretyakov
Sergei Kosulnikov
Aalto University

Corresponding Author:[email protected]

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Cuesta Soto Francisco
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Xuchen Wang
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Sergei Tretyakov
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Abstract

Reconfigurable intelligent surfaces (RIS) are a promising tool for optimization of propagation channels for advanced  wireless communication systems. These tools are especially relevant for high-frequency (millimeter-band) links where directive antennas are used. RIS panels act as high-gain passive repeaters, whose reflected waves interfere with the waves reflected from the illuminated spots at  supporting walls, creating a complex field pattern in the far zone. In this work, we develop a simple link-budget model for non-line-of-sight channels via reflections from a finite size metasurface designed as a perfect anomalous reflector. The developed model takes into account diffraction at  the RIS panel edges as well as interference with reflections from supporting structures. We take into account realistic losses and confirm the validity of results by numerical simulations.
Jun 2023Published in IEEE Transactions on Antennas and Propagation volume 71 issue 6 on pages 5276-5288. 10.1109/TAP.2023.3264982