Scattering from a finite size grounded dielectric substrate excited by a plane wave or an elementary dipole source

2002 ◽  
Author(s):  
D.I. Kaklamani ◽  
N.K. Uzunoglu
Keyword(s):  
Plane Wave ◽  
Finite Size ◽  
Dielectric Substrate ◽  
Dipole Source

Radio propagation over a flat Earth across a boundary separating two different media

1953 ◽  
Vol 246 (905) ◽  
pp. 1-55 ◽  
Keyword(s):  
Plane Wave ◽  
Plane Waves ◽  
Angular Spectrum ◽  
Dipole Source ◽  
Radio Waves ◽  
Dual Integral Equations ◽  
Plane Wave Incident ◽  
General Complex ◽  
Infinite Conductivity ◽  
New Feature

A theoretical investigation is given of the phenomena arising when vertically polarized radio waves are propagated across a boundary between two homogeneous sections of the earth’s surface which have different complex permittivities. The problem is treated in a two-dimensional form, but the results, when suitably interpreted, are valid for a dipole source. The earth’s surface is assumed to be flat. In the first part of the paper one section of the earth is taken to have infinite conductivity and is represented by an infinitely thin, perfectly conducting half-plane lying in the surface of an otherwise homogeneous earth. The resulting boundary-value problem is initially solved for a plane wave incident at an arbitrary angle; the scattered field due to surface currents induced in the perfectly conducting sheet is expressed as an angular spectrum of plane waves, and this formulation leads to dual integral equations which are treated rigorously by the methods of contour integration. The solution for a line-source is then derived by integration of the plane-wave solutions over an appropriate range of angles of incidence, and is reduced to a form in which the new feature is an integral of the type missing text where a and b are in general complex within a certain range of argument.

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

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>

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

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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