Electromagnetic-wave sounding in a conducting half-space containing thin inclusions: Nondestructive testing theory

1992 ◽  
Vol 27 (3) ◽  
pp. 295-299
Author(s):  
Z. T. Nazarchuk ◽  
O. I. Ovsyannikov
Keyword(s):  
Electromagnetic Wave ◽  
Nondestructive Testing ◽  
Half Space ◽  
Testing Theory

The outgoing time-harmonic electromagnetic wave in a half-space with non-absorbing impedance boundary condition

2019 ◽  
Vol 53 (1) ◽  
pp. 325-350
Author(s):  
Sergio Rojas ◽  
Ignacio Muga ◽  
Carlos Jerez-Hanckes
Keyword(s):  
Boundary Condition ◽  
Electromagnetic Wave ◽  
Asymptotic Analysis ◽  
Radiation Pattern ◽  
Half Space ◽  
Existence And Uniqueness ◽  
Radiation Condition ◽  
Impedance Boundary Condition ◽  
Impedance Boundary ◽  
Time Harmonic

We show existence and uniqueness of the outgoing solution for the Maxwell problem with an impedance boundary condition of Leontovitch type in a half-space. Due to the presence of surface waves guided by an infinite surface, the established radiation condition differs from the classical one when approaching the boundary of the half-space. This specific radiation pattern is derived from an accurate asymptotic analysis of the Green’s dyad associated to this problem.

Reflection of waves at an interface in a streaming plasma

1968 ◽  
Vol 2 (3) ◽  
pp. 381-393
Author(s):  
P. C. Clemmow ◽  
E. Ott
Keyword(s):  
Electromagnetic Wave ◽  
Half Space ◽  
Cold Plasma ◽  
Plane Electromagnetic Wave ◽  
Plasma Stream ◽  
Relativistic Velocity ◽  
Reflected Wave ◽  
First Approximation ◽  
Transmitted Waves ◽  
The Face

A uniform, unbounded, cold plasma stream, with relativistic velocity (0,U, 0), traverses a vacuum half-spacey> 0 and a dielectric half-spacey< 0. A plane electromagnetic wave in the plasma stream iny> 0 is incident obliquely on the face of the dielectric. The criterion for determining which characteristic waves are present in each half space is discussed, and it is shown that, for the polarization in which B is parallel toy= 0, there is one reflected wave and three transmitted waves. One of the latter can be an amplifying wave. A first approximation to the transmission and reflexion coefficients is found in the case when the density of the stream is low.

scholarly journals REFLECTION OF ELECTROMAGNETIC WAVE FROM THE BORDER OF ELASTIC ENVIRONMENT FROM PIEZOACTIVE MATERIAL

2020 ◽  
Vol 6 (5) ◽  
pp. 2-5
Author(s):  
M.V. Belubekyan ◽  
◽  
V.G. Garakov ◽  
Keyword(s):  
Electromagnetic Wave ◽  
Piezoelectric Material ◽  
Half Space ◽  
Plane Electromagnetic Wave ◽  
Dielectric Medium ◽  
Hexagonal Symmetry ◽  
Reflection And Refraction ◽  
Elastic Shear ◽  
Transparency Condition ◽  
Wave Incidence

A plane electromagnetic wave incident on the interface of a dielectric medium made of a piezoactive material leads to the excitation of elastic shear waves. Piezoelectric material is assumed to have 6mm class hexagonal symmetry. The case of a half-space and a finite layer is considered. Coefficients of reflection and refraction are determined. In the problem of an electromagnetic wave incidence on a half-space made of a piezoelectric material of hexagonal symmetry, class 6 mm, the nature of the piezoelectric effect influence on the transparency condition is established. In the case of reflection from a finite piezolayer, reflection coefficients are determined for different variants of boundary conditions.

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