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Information × Registration Number 0225U002345, (0122U001428) , R & D reports Title Formation and transformation of harmonic and non-stationary electromagnetic fields by multi-element structures of electric and magnetic type radiators using nonlinear elements popup.stage_title Оптимізація характеристик багатоелементних структур випромінювачів електричного і магнітного типів. Head Berdnyk Serhii L., Доктор фізико-математичних наук Registration Date 05-03-2025 Organization V.N. Karazin Kharkiv National University popup.description1 The purpose of the work is the further development of numerical-analytical methods for solving boundary-value problems of electrodynamics for multi-element radiating structures, carrying out multi-parameter modeling to determine the physical properties of radiating structures with new and improved functional characteristics for various fields of application; creation of a rigorous approach to the analysis of open microresonators consisting of radiators made of graphene; development of a nonlinear theory of systems for collecting, controlling and converting electromagnetic energy into direct current and determining the physical properties of reconfigured rectens for further improvement and implementation of technologies for constructing alternative energy sources. popup.description2  The purpose of the work is the further development of numerical analytical methods for solving boundary value problems of electrodynamics with nonlinear boundary conditions for multi-resonant, multi-element radiating structures; building on their basis mathematical models of emitters of various types; conducting effective multi-parameter modeling to determine the physical properties of radiating structures with new and improved functional characteristics for various applications. Mathematical models were constructed, and the energy characteristics of a multi-resonator slot structure based on resonant diaphragms in a rectangular waveguide, the electrodynamic characteristics of a Clevin radiator with a transverse slot in a rectangular waveguide with a tunable impedance monopole inside the waveguide were investigated and optimized. Designs of microstrip antennas and antenna arrays of linear and circular polarization for communication systems, electronic reconnaissance, and electronic warfare have been developed and optimized. A pulsed antenna array based on pulsed combined electric and magnetic antennas, which are an ultra-broadband analogue of the Clevin radiator, has been developed. Spatial, frequency and time characteristics of such array were analyzed. A mathematical model of the excitation of an open micro-resonator in the form of a dielectric rod with a finite lattice of surface rectangular-cylindrical emitters made of graphene, located on the surface of a circular dielectric cylinder, was constructed. A nonlinear mathematical model of reconfigurable rectennas was constructed and practical recommendations were developed for the design and synthesis of reconfigurable rectennas with optimal energy characteristics depending on the modes and conditions of their operation. Product Description popup.authors Antonenko Yevhenii O. Havrylenko Dmytro I. Homozov Andrii V. Didenko Valerii P. Zozulia Valerii O. Katrych Viktor O. Katrych Volodymyr V. Kovalenko Alina O. Kuznetsova Tetiana Yu. Masalov Serhii O. Nesterenko Mykhailo V. Polianskyi Mykola Ye. Pshenychna Kateryna V. Svezhentsev Oleksandr Ye. Starikov Oleksandr I. Shepilko Yevhen V. Shtoda Dmytro O. popup.nrat_date 2025-03-05 Close