Characterisation of layered dielectric medium using reflection coefficient

1998 ◽  
Vol 34 (12) ◽  
pp. 1207 ◽  
Author(s):  
Y. Huang ◽  
M. Nakhkash
Keyword(s):  
Reflection Coefficient ◽  
Dielectric Medium ◽  
Layered Dielectric

Transient fields of a vertical electric dipole on an M-layered dielectric medium

2003 ◽  
Vol 81 (6) ◽  
pp. 869-875 ◽  
Author(s):  
O M Abo-Seida ◽  
G M Sami
Keyword(s):  
Magnetic Fields ◽  
Electric Dipole ◽  
Short Pulse ◽  
Analytical Form ◽  
Dielectric Medium ◽  
Vertical Electric Dipole ◽  
Multilayered Medium ◽  
Finite Integral ◽  
Layered Dielectric ◽  
Explicit Derivation

A simple and explicit derivation for the vertical electric dipole excited by a short-pulse current and located above a layered dielectric medium is derived in an analytical form using the Cagniard–de Hoop method. The fields are expressed as the convolution of the exciting current with the layered medium response. This response is obtained directly from the integral representation for the magnetic fields in the frequency domain and is expressed as a finite integral. A modified Cagniard method is then used to derive closed-form expressions for the vertical dipole anywhere above a multilayered medium. The method is used to perform numerical calculations of the magnetic fields for applications to geo-radar operating on layered media. PACS Nos.: 41.20.Jb, 42.25.Bs, 42.25.Gy

Modified broadside-coupled strips in a layered dielectric medium†.

1976 ◽  
Vol 40 (4) ◽  
pp. 377-391 ◽  
Author(s):  
WILLIAM J. BARNES ◽  
JAMES L. ALLEN
Keyword(s):  
Dielectric Medium ◽  
Layered Dielectric

scholarly journals Антиклассическое приближение в задаче об отражении электромагнитной волны от неоднородной среды

2022 ◽  
Vol 92 (1) ◽  
pp. 5
Author(s):  
В.В. Шагаев
Keyword(s):  
Perturbation Theory ◽  
Reflection Coefficient ◽  
Analytical Solution ◽  
Numerical Solution ◽  
Layer Thickness ◽  
Electromagnetic Waves ◽  
Dielectric Medium ◽  
Quadratic Approximation ◽  
Reflection Coefficients ◽  
Inhomogeneous Layer

Expressions are derived for the reflection coefficients of electromagnetic waves with "p" and "s" type polarizations from a semi-infinite dielectric medium having an inhomogeneous layer. The influence of the layer was taken into account by the method of perturbation theory in a quadratic approximation of the layer thickness. A method is proposed for converting expressions derived using perturbation theory into other expressions that give more accurate values of the reflection coefficient. The angular dependences of the reflection coefficient obtained by the developed method are compared with those obtained by the numerical solution of electrodynamic equations. Requirements for the layer characteristics are formulated to minimize the error of the analytical solution.

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