Minimization of thickness of nonuniform absorbing layer with specified modulus of reflection coefficient of monochromatic wave

1975 ◽  
Vol 14 (1) ◽  
pp. 120-124
Author(s):  
M. M. Machevariani ◽  
V. B. Mironova
Keyword(s):  
Reflection Coefficient ◽  
Monochromatic Wave ◽  
Absorbing Layer

scholarly journals Инварианты коэффициента отражения

2020 ◽  
Vol 128 (2) ◽  
pp. 266
Author(s):  
Л.А. Федюхин ◽  
А.В. Горчаков ◽  
Е.А. Колосовский
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Parallel Plate ◽  
Layer Structure ◽  
Direct Calculation ◽  
Reflection Factor ◽  
Monochromatic Wave ◽  
Material Parameters ◽  
Linearly Polarized ◽  
Analytical Expressions

A detailed analysis of the reflection coefficient of linearly polarized in plane of incidence of a plane monochromatic wave from a three-layer structure is carried out. Solved the reverse problem ellipsometry for a three-layer structure. The existence of two reflection factor invariants for the flat-parallel plate is shown. A set of three observable parameters not previously used is proposed, which allows to restore the material parameters of the layer. Analytical expressions are obtained both for the reflection coefficient and incidence angles for a number of important particular cases, and for the direct calculation of the dielectric constant and layer thickness from the measured values of the observed parameters.

The method of determining the metrological performance of unit reference standards of reflection coefficient in waveguides at millimeter waves

2020 ◽  
pp. 59-63
Author(s):  
A.S. Bondarenko ◽  
A.S. Borovkov ◽  
I.M. Malay ◽  
V.A. Semyonov
Keyword(s):  
Reflection Coefficient ◽  
Millimeter Waves ◽  
Primary Standard ◽  
Reference Standards ◽  
Measurement Scale ◽  
Current State ◽  
Coefficient Measurement ◽  
Mathematical Equations ◽  
Electrodynamic Modeling ◽  
Metrological Performance

The analysis of the current state of the reflection coefficient measurements in waveguides at millimeter waves is carried out. An approach for solving the problem of reproducing the reflection coefficient measurement scale is proposed. Mathematical equations, which are the basis of the reflection coefficient measurement equation are obtained. The method of determining the metrological performance of reflection coefficient unit’s reference standards is developed. The results of electrodynamic modeling and analytical calculations by the developed method are compared. It is shown that this method can be used for reproducing the reflection coefficient unit in the development of the State primary standard.

REFLECTION COEFFICIENT OF AN ELECTROMAGNETIC WAVE IN CONDUCTIVE MEDIA

2018 ◽  
pp. 100-106
Author(s):  
M. S. Sudakova ◽  
M. L. Vladov ◽  
M. R. Sadurtdinov
Keyword(s):  
Reflection Coefficient ◽  
Ground Penetrating Radar ◽  
Electromagnetic Waves ◽  
Water Contamination ◽  
Survey Design ◽  
Direct And Inverse Problems ◽  
The Difference ◽  
Ground Penetrating ◽  
Ideal Dielectric

Within the ground penetrating radar bandwidth the medium is considered to be an ideal dielectric, which is not always true. Electromagnetic waves reflection coefficient conductivity dependence showed a significant role of the difference in conductivity in reflection strength. It was confirmed by physical modeling. Conductivity of geological media should be taken into account when solving direct and inverse problems, survey design planning, etc. Ground penetrating radar can be used to solve the problem of mapping of halocline or determine water contamination.

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