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Information × Registration Number 0224U000912, 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 Head Berdnyk Serhii L., Доктор фізико-математичних наук Registration Date 14-01-2024 Organization V.N. Karazin Kharkiv National University 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 adequate 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 fields of application. 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 studied. The possibilities of controlling the characteristics of such structures by changing the geometric and electrophysical parameters of their elements are analyzed. 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 mathematical model of reconfigurable rectennas has been constructed and practical recommendations for the design and synthesis of reconfigurable rectennas used in various wireless energy transmission systems have been developed. Product Description popup.authors Dumin Oleksandr M. Zozulia Valerii О. Katrych Viktor О. Nesterenko Mykhailo V. Svezhentsev Oleksandr Е. popup.nrat_date 2024-01-14 Close