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Information × Registration Number 0223U000925, 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 21-01-2023 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; development of the nonlinear theory of systems for collecting, controlling and converting electromagnetic energy into direct current (reconfigured rectens) and determining the physical properties of reconfigured rectens for further improvement and implementation of technologies for the construction of alternative energy sources. The problem of diffraction of electromagnetic waves on a system of resonators in a rectangular waveguide connected by diaphragms with resonant slots is solved using the generalized method of the induced magnetomotive forces. A mathematical model for a Klevin radiator with a transverse slot in a wide wall of a rectangular waveguide and impedance monopoles is constructed. A pulsed ultra-broadband radiator of electric and magnetic type, an analogue of the Klevin emitter, has been developed, in which the necessary characteristics are provided by the strong interaction of its constituent parts. Optimization of its parameters and a comprehensive analysis of the directional, frequency and time characteristics of such radiator were carried out. 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 designing reconfigurable rectennas used in various wirele Product Description popup.authors Gomozov Andriy V. Hretskykh Dmytro V. Dumin Oleksandr M. Katrych Viktor О. Nesterenko Mykhailo V. Svezhentsev Oleksandr Ye. popup.nrat_date 2023-01-21 Close