A new reflection and transmission analysis of a finite size frequency selective subreflector due to a finite source; a plane wave spectrum approach

On the integration of reconfigurable intelligent surfaces in real-world environments

10.36227/techrxiv.16628260 ◽

2021 ◽

Author(s):

Ana Díaz-Rubio ◽

Sergei Tretyakov

Keyword(s):

Plane Wave ◽

Real World ◽

Finite Size ◽

Physical Optics ◽

Next Generation ◽

Reflection And Transmission ◽

Communications Systems ◽

Physical Optics Approximation ◽

Directive Antennas ◽

Uniform Plane

<div>The use of reconfigurable intelligent surfaces (RISs) for optimization of propagation channels is one of the most promising and revolutionizing techniques for improving the efficiency of the next generation of communications systems. In this work, we combine the physical optics approximation and the theory of diffraction gratings to study the scattering properties of finite-size metasurfaces mounted on partially reflecting walls and illuminated by directive antennas. We consider both reflective and refractive metasurfaces designed to control both reflection and transmission of waves. We start the analysis under the assumption of uniform, plane-wave illumination, and then discuss non-uniform illuminations by directive antennas.</div>

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On the integration of reconfigurable intelligent surfaces in real-world environments

10.36227/techrxiv.16628260.v1 ◽

2021 ◽

Author(s):

Ana Díaz-Rubio ◽

Sergei Tretyakov

Keyword(s):

Plane Wave ◽

Real World ◽

Finite Size ◽

Physical Optics ◽

Next Generation ◽

Reflection And Transmission ◽

Communications Systems ◽

Physical Optics Approximation ◽

Directive Antennas ◽

Uniform Plane

<div>The use of reconfigurable intelligent surfaces (RISs) for optimization of propagation channels is one of the most promising and revolutionizing techniques for improving the efficiency of the next generation of communications systems. In this work, we combine the physical optics approximation and the theory of diffraction gratings to study the scattering properties of finite-size metasurfaces mounted on partially reflecting walls and illuminated by directive antennas. We consider both reflective and refractive metasurfaces designed to control both reflection and transmission of waves. We start the analysis under the assumption of uniform, plane-wave illumination, and then discuss non-uniform illuminations by directive antennas.</div>

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Reflection and Transmission of a Plane Wave by an Array of Cavities in the Interface of Two Solids

Journal of Applied Mechanics ◽

10.1115/1.2899414 ◽

1992 ◽

Vol 59 (1) ◽

pp. 102-108 ◽

Cited By ~ 2

Author(s):

Yonglin Xu

Keyword(s):

Plane Wave ◽

Integral Equations ◽

Boundary Integral Equations ◽

Singular Integral Equations ◽

Boundary Integral ◽

Reflection And Transmission ◽

Transmission Coefficients ◽

Typical Cell ◽

Wave States ◽

Doubly Periodic Array

The reflection and transmission of a plane wave by a distribution of cavities in the interface of two solids of different mechanical properties are investigated. For the calculation of the reflection and transmission coefficients by a distribution of cavities, six auxiliary wave states are used in conjunction with the reciprocal identity. Specific results are presented for scattering by a doubly periodic array of cavities in the interface of solids of different elastic moduli and mass densities. For a typical cell, the boundary integral equations for scattering by a cavity at the interface of two solids are derived on the basis of continuity of displacements and tractions across the interface and by taking advantage of the geometrical periodicity. Solutions to the system of singular integral equations have been obtained by the boundary element method. Numerical results are presented as functions of the frequency for two angles of incidence.

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