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0223U000852,
0120U102213
,
Energy transformations of electromagnetic waves of the millimeter and terahertz ranges in diffraction processes on impedance structures.
Katrich Viktor O., Доктор фізико-математичних наук
20-01-2023
V.N. Karazin Kharkiv National University
The aim of the work is further development of numerical-analytical methods of research of ponderomotive action of electromagnetic waves on vibrator scatterers with distributed impedance, creation of integrated mathematical models based on them, which allow to study ponderomotive influence on mechanical motion of vibrator elements, development of effective methods of analysis and synthesis of slot transmission lines of millimeter and terahertz waves and development of recommendations for the creation of new elements and devices of such ranges. At the third stage of the work, the features of the ponderomotive action of electromagnetic waves on impedance fixed nanovibrators with a constant distributed impedance were studied during dynamic transformation of their geometric configuration. The forces acting on a thin metal vibrator in a waveguide are calculated. It has been established that, in addition to the longitudinal, the transverse force also acts on the vibrator. The problems of the motion of a vibrator with two fixed ends and with one fixed end under the action of continuous or pulsed radiation are solved. The research results can be used to solve the problems of controlling the position of a microtarget (vibrator) using microwave radiation. Natural oscillations of the aperture of a flat connection of a circular waveguide with a set of rectangular waveguides are studied. They play a decisive role in the generation of natural oscillations of more complex wave-like components containing the considered planar joints. It is shown that the real part of the oscillation frequency can be reduced by increasing the number of rectangular waveguides arranged in accordance with the rotational symmetry and/or their width. Natural oscillations can be shifted even below the cutoff frequency of the fundamental mode of a circular waveguide in the case of two wide rectangular waveguides. It is shown that when rectangular waveguides are located along concentric rings, the number of
Berdnyk Serhii L.
Kyrylenko Anatolii O.
Kokodiy Mykola H
Nesterenko Mykhailo V.
Pshenychna Svіtlana V.
Steshenko Serhii O.
2023-01-20
Updated: 2025-12-15
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