scholarly journals Numerical Method for Electromagnetic Wave Propagation Problem in a Cylindrical Anisotropic Waveguide with Longitudinal Magnetization

2019 ◽  
Vol 8 (4) ◽  
pp. 130-135
Author(s):  
E. Smolkin ◽  
M. Snegur
Keyword(s):  
Electromagnetic Waves ◽  
Dielectric Waveguide ◽  
Electromagnetic Wave Propagation ◽  
Physical Problem ◽  
Longitudinal Magnetization ◽  
Spectral Parameters ◽  
Transmission Eigenvalue ◽  
Wave Propagation Problem ◽  
Transmission Eigenvalue Problem ◽  
Anisotropic Waveguide

The propagation of monochromatic electromagnetic waves in metal circular cylindrical dielectric waveguide with longitudinal magnetization filled with anisotropic inhomogeneous waveguide is considered. The physical problem is reduced to solving a transmission eigenvalue problem for a system of ordinary differential equations. Spectral parameters of the problem are propagation constants of the waveguide. Numerical results are obtained using a modification of the projecting methods. The comparison with known exact solutions (for particular values of parameters) are made.

scholarly journals NUMERICAL METHOD FOR ELECTROMAGNETIC WAVE PROPAGATION PROBLEM IN A CYLINDRICAL INHOMOGENEOUS METAL DIELECTRIC WAVEGUIDING STRUCTURES

2017 ◽  
Vol 22 (3) ◽  
pp. 271-282 ◽  
Author(s):  
Eugene Smolkin
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Physical Problem ◽  
Dielectric Waveguides ◽  
Spectral Parameters ◽  
Transmission Eigenvalue ◽  
Wave Propagation Problem ◽  
Transmission Eigenvalue Problem

The propagation of monochromatic electromagnetic waves in metal circular cylindrical dielectric waveguides filled with inhomogeneous medium is considered. The physical problem is reduced to solving a transmission eigenvalue problem for a system of ordinary differential equations. Spectral parameters of the problem are propagation constants of the waveguide. Numerical results are found with a projection method. The comparison with known exact solutions (for particular values of parameters) is made.

scholarly journals Features of electromagnetic wave propagation in two- and three-layer cylindrical dielectric waveguides

2019 ◽  
Vol 30 ◽  
pp. 06006
Author(s):  
Alexander G. Shein ◽  
Tatiana S. Kharlanova
Keyword(s):  
Electromagnetic Waves ◽  
Dielectric Waveguide ◽  
Electromagnetic Wave Propagation ◽  
Azimuthal Angle ◽  
Transverse Magnetic ◽  
Cylindrical Shape ◽  
Dielectric Waveguides ◽  
Power Flux ◽  
Open Dielectric Waveguide ◽  
Layer Waveguide

Various characteristics of electromagnetic waves propagating in two- and three-layer open-dielectric waveguide structures of cylindrical shape are studied. Parameters of wave components in separate areas of the waveguide are considered. Electrodynamic characteristics and frequency dependencies for several values of layer dielectric permittivity obtained during the study are analyzed. The corresponding graphs of dependencies are presented. The dependencies of the power flux density of transverse magnetic (TM) waves in two- and three-layer waveguide structures in the absence of field dependence on azimuthal angle are considered.

scholarly journals Theory of Nonlinear Guided Electromagnetic Waves in a Plane Two-Layered Dielectric Waveguide

2017 ◽  
Vol 2017 ◽  
pp. 1-19 ◽  
Author(s):  
Valeria Yu. Kurseeva ◽  
Dmitry V. Valovik
Keyword(s):  
Electromagnetic Waves ◽  
Dielectric Waveguide ◽  
Guided Waves ◽  
Transverse Electric ◽  
Nonlinear Eigenvalue Problem ◽  
Discontinuous Coefficients ◽  
Wave Propagation Problem ◽  
Propagation Regime ◽  
Homogeneous Plane ◽  
Layered Dielectric

Propagation of transverse electric electromagnetic waves in a homogeneous plane two-layered dielectric waveguide filled with a nonlinear medium is considered. The original wave propagation problem is reduced to a nonlinear eigenvalue problem for an equation with discontinuous coefficients. The eigenvalues are propagation constants (PCs) of the guided waves that the waveguide supports. The existence of PCs that do not have linear counterparts and therefore cannot be found with any perturbation method is proven. PCs without linear counterparts correspond to a novel propagation regime that arises due to the nonlinearity. Numerical results are also presented; the comparison between linear and nonlinear cases is made.

Detection of delamination in composites by using electromagnetic penetrating radar

2014 ◽  
Vol 5 (2) ◽  
pp. 151-156
Author(s):  
Z. Mechbal ◽  
A. Khamlichi
Keyword(s):  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Wave Reflection ◽  
Image Features ◽  
Partial Reflection ◽  
Straight Path ◽  
Reflected Signal ◽  
Short Time ◽  
Intervening Factors

Composites made from E-glass/epoxy or aramid/epoxy are frequently used in aircraft and aerospace industries. These materials are prone to suffer from the presence of delamination, which can reduce severely the performance of aircrafts and even threaten their safety. Since electric conductivity of these composites is rather small, they can propagate electromagnetic waves. Detection of delamination damage can then be monitored by using an electromagnetic penetrating radar scanner, which consists of emitting waves having the form of short time pulses that are centered on a given work frequency. While propagating, these waves undergo partial reflection when running into an obstacle or a material discontinuity. Habitually, the radar is moved at constant speed along a straight path and the reflected signal is processed as a radargram that gives the reflected energy as function of the two-way time and the antenna position.In this work, modeling of electromagnetic wave propagation in composites made from E-glass/epoxy was performed analytically. The electromagnetic wave reflection from a delamination defect was analyzed as function of key intervening factors which include the defect extent and depth, as well as the work frequency. Various simulations were performed and the obtained results have enabled to correlate the reflection pattern image features to the actual delamination defect characteristics which can provide quantification of delamination.

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