A uniqueness theorem in the inverse problem for the integrodifferential electrodynamics equations
The reports of the scientific and technical conference reflected the results of theoretical and experimental research in the field of electrodynamics and microwave technology, microwave electronics, nanoelectronics, power electronics, semiconductor electronics, electric power engineering, systems of measuring and medical technology.The results of the study of resonator and slowing down systems, microwave devices, devices for vacuum, plasma and microelectronics, technological issues of manufacturing electronic products are presented.The collection includes three sections: microwave electronics, vacuum microelectronics and nanoelectronics; electrodynamics and microwave technology; technologies for the production of electronic devices, power electronics, applied aspects of electronic instrumentation.For specialists in the field of electronic engineering, electrodynamics and microwave engineering, microwave energy, control and measuring and medical technology, as well as teachers, students, undergraduates and postgraduates of radiophysical, electronic and energy specialties.
The effect of dielectric supports on the slowing factor and dispersion of the helical line in TWT is considered. A method for the calculation of the slowing down in the helical line with the complicated configuration of the dielectric supports is proposed. A procedure for the experimental study of dispersion in the helical slow_wave system is presented. The calculated results are compared with the experimental data.
A TWT model formed by a meta-magnetic plate and a metal screen is offered and analyzed. The dispersion equation of the model in the presence of a homogeneous electron beam filling the space between the plate and the screen is derived and solved. The coupling and depression coefficients are calculated by the method of differentiation the dispersion equation. The calculated characteristics are compared with the TWT models on a dielectric plate and an “impedance” comb.
A study of waveguide structures with magnetic walls that were based on mushroom-shaped metamaterials has been carried out. We used Ansoft HFSS to simulate waveguide filters with a forbidden frequency band. The results obtained showed that a magnetic wall made of periodic various sized unit cells can provide several forbidden frequency bands instead of only one in case of single sized elements. We also demonstrated that it is possible to control rejection bands of frequency-selective surfaces by varying the permeability of ferrite coating of the metamaterial.
Propagation of the short vector envelope solitons in a inhomogeneous medium with linear potential in coupled third–order nonlinear Shrodinger equations frame is considered. Explicit vector soliton solution is obtained. The explicit solution for the solitons trajectories is studied. In particular cases this solitons solution can be reduced as to the short scalar soliton solution on linear inhomogeneity profile, as to well – known Chen soliton solution.