Ray representation of the electromagnetic field in a circular hollow dielectric waveguide used as a facility for scattering measurements

1998 ◽  
Vol 46 (7) ◽  
pp. 1116-1117 ◽  
Author(s):  
V.K. Kiseliov ◽  
T.M. Kushta
Keyword(s):  
Electromagnetic Field ◽  
Dielectric Waveguide ◽  
Scattering Measurements ◽  
Hollow Dielectric Waveguide

Extinction and scattering of a guided beam in a hollow dielectric waveguide

2001 ◽  
Vol 18 (7) ◽  
pp. 1690 ◽  
Author(s):  
Taras M. Kushta ◽  
Kiyotoshi Yasumoto ◽  
Vladimir K. Kiseliov
Keyword(s):  
Dielectric Waveguide ◽  
Hollow Dielectric Waveguide

Analysis of mode structure in hollow dielectric waveguide fibers

2003 ◽  
Vol 67 (4) ◽  
Author(s):  
Mihai Ibanescu ◽  
Steven G. Johnson ◽  
Marin Soljačić ◽  
J. D. Joannopoulos ◽  
Yoel Fink ◽  
...  
Keyword(s):  
Dielectric Waveguide ◽  
Mode Structure ◽  
Hollow Dielectric Waveguide

scholarly journals Optimization of the method for exciting an inverted strip dielectric waveguide with metal plane

2019 ◽  
Keyword(s):  
Electromagnetic Field ◽  
Insertion Loss ◽  
Dielectric Waveguide ◽  
Wave Mode ◽  
Dielectric Constants ◽  
Dielectric Waveguides ◽  
Frequency Selection ◽  
Selection Mode ◽  
Functional Units ◽  
Dielectric Structures

Background. Currently, the application of various types of dielectric waveguides in the millimeter wavelength range is very promising, including metal-dielectric structures and functional units based on them. This is due to the simplicity and low cost of manufacturing dielectric waveguides and functional units based on them, the possibility of their integration with active elements, the use of various dielectrics and polymers having both a wide range of dielectric constants and a variety of mechanical properties (in particular, some dielectric materials have significant flexibility).Objectives. To optimize the method of excitation of one of its eigenwaves in a inverted strip dielectric waveguide with a metal plane through a series of physical experiments.Materials and methods. The studied electrodynamic structure belongs to the class of hybrid metal-dielectric structures. Its basis is a inverted strip dielectric waveguide with a metal plane. A feature of the used inverted strip dielectric waveguide is its composition: the main part of the waveguide rod adjacent to the metal plane is made of polystyrene, the second part is made of fluoroplastic. The evaluation of the excitation efficiency was carried out by the magnitude of the introduced attenuation into the tract. Using the method of a moving probe, the degree of concentration of the electromagnetic field near a complex compositional waveguiding rod was estimated. The fields were visualized using the contour method.Results. Based on a series of experimental studies, the method for exciting an inverted strip dielectric waveguide with a metal plane is optimized. The effect of optimal excitation was achieved through the use of the composite design of the dielectric waveguiding rod. With the optimal ratio of the material constants of the layers forming the waveguiding rod and the geometric parameters of these layers, it was possible to significantly expand the working frequency band, within which the level of insertion loss did not exceed the specified values. It was found that the electromagnetic field is concentrated mainly near the dielectric rod, providing a stable wave mode. It has been established that with a certain ratio of structure parameters, the frequency selection mode can be implemented in it. Conclusions. In the course of physical measurements, it was found that a inverted strip dielectric waveguide with a metal plane with the optimal choice of parameters is able to effectively maintain the wave mode with a low level of insertion loss. In general, a structure with a certain choice of parameters can operate in two regimes: waveguiding mode and frequency selection mode.

scholarly journals SPATIO-TEMPORAL STRUCTURE OF CHERENKOV RADIATION EXCITED BY A LASER PULSE IN AN IONIC DIELECTRIC WAVEGUIDE

2021 ◽  
pp. 74-77
Author(s):  
V.A. Balakirev ◽  
P.I. Markov ◽  
I.N. Onishchenko
Keyword(s):  
Electromagnetic Field ◽  
Laser Pulse ◽  
Electromagnetic Radiation ◽  
Frequency Spectrum ◽  
Dielectric Waveguide ◽  
Cherenkov Radiation ◽  
Temporal Structure ◽  
Mode Composition ◽  
Spatio Temporal

The process of excitation of Cherenkov electromagnetic radiation by a laser pulse in an ionic dielectric waveguide, is investigated. The frequency spectrum and mode composition of the Cherenkov radiation are determined. The spatio-temporal structure of the Cherenkov electromagnetic field is obtained and investigated.

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