Smart Radio Environments Empowered by Reconfigurable Intelligent Surfaces: How It Works, State of Research, and The Road Ahead
- M. Renzo, A. Zappone, S. Tretyakov
- Computer ScienceIEEE Journal on Selected Areas in Communications
- 20 April 2020
The emerging research field of RIS-empowered SREs is introduced; the most suitable applications of RISs in wireless networks are overviewed; an electromagnetic-based communication-theoretic framework for analyzing and optimizing metamaterial-based RISs is presented; and the most important research issues to tackle are discussed.
Analytical Modeling in Applied Electromagnetics
- S. Tretyakov
- Materials Science
- 30 June 2003
Thin layers and sheets interfaces with highly conducting materials periodical structures, arrays and meshes composite materials applications in metamaterials and artificial impedance surfaces.
Simple and Accurate Analytical Model of Planar Grids and High-Impedance Surfaces Comprising Metal Strips or Patches
- O. Luukkonen, C. Simovski, S. Tretyakov
- PhysicsIEEE Transactions on Antennas and Propagation
- 24 May 2007
Simple analytical formulas are introduced for the grid impedance of electrically dense arrays of square patches and for the surface impedance of high-impedance surfaces based on the dense arrays of…
Strong spatial dispersion in wire media in the very large wavelength limit
- P. Belov, R. Marqués, S. Tretyakov
- Physics
- 11 November 2002
It is found that there exist composite media that exhibit strong spatial dispersion even in the very large wavelength limit. This follows from the study of lattices of ideally conducting parallel…
Electromagnetics of bi-anisotropic materials: Theory and applications
- A. N. Serdyukov, I. Semchenko, S. Tretyakov, A. Sihvola
- Physics
- 2001
Synthesis of Polarization Transformers
- T. Niemi, A. Karilainen, S. Tretyakov
- PhysicsIEEE Transactions on Antennas and Propagation
- 11 March 2013
We study the possibility of analytically synthesizing different polarization-transforming devices realized as arrays of small particles. The proposed method is based on general relations between the…
Reconfigurable Intelligent Surfaces vs. Relaying: Differences, Similarities, and Performance Comparison
- M. Di Renzo, K. Ntontin, S. Shamai
- BusinessIEEE Open Journal of the Communications Society
- 23 August 2019
The present paper elaborates on the key differences and similarities between RISs that are configured to operate as anomalous reflectors and relays and illustrates numerical results that highlight the spectral efficiency gains of RISs when their size is sufficiently large as compared with the wavelength of the radio waves.
Thin perfect absorbers for electromagnetic waves: Theory, design, and realizations
- Y. Ra'di, C. Simovski, S. Tretyakov
- Physics
- 17 March 2015
In recent years we have learned to fabricate structures smaller than electromagnetic wavelengths, and to assemble them into metamaterials with exotic optical properties for previously unimaginable…
Perfect control of reflection and refraction using spatially dispersive metasurfaces
- V. Asadchy, M. Albooyeh, S. Tcvetkova, A. D'iaz-Rubio, Y. Ra'di, S. Tretyakov
- Geology
- 6 May 2016
Nonuniform metasurfaces (electrically thin composite layers) can be used for shaping refracted and reflected electromagnetic waves. However, known design approaches based on the generalized…
A Stepwise Nicolson–Ross–Weir-Based Material Parameter Extraction Method
- O. Luukkonen, S. Maslovski, S. Tretyakov
- BusinessIEEE Antennas and Wireless Propagation Letters
- 11 November 2011
Approaches of automated evaluation of electromagnetic material parameters have received a lot of attention in the literature. Among others, one method is to retrieve the material parameters from the…
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