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Information × Registration Number 0308U003023, 0107U000690 , R & D reports Title Еxcitation, scattering and radiation of electromagnetic fields with waveguide - slot and vibrator structures in matter popup.stage_title Збудження, розсіяння та випромінювання електромагнітних полів щілинними неоднорідностями в одномодових і багатомодових хвилевідних системах та імпедансними вібраторами Head Katrich V, Доктор фізико-математичних наук Registration Date 20-02-2008 Organization Kharkov National University named after V.N.Karazin popup.description2 The report on SRP: 62 p., 34 figures, 29 sources. Object of investigation - electromagnetic fields, diffraction phenomena, processes of excitation, radiation and scattering of electromagnetic fields by impedance dipole, waveguide-slot structures any geometrical dimensions in the material medium. The purpose of the project - revealing of multiple-parameter dependence of electro-dynamic characteristics of electromagnetic fields from the geometrical dimensions and material parameters of excitable volumes and radiating structures; development of the theory and construction of physical and mathematical models of the basic types of radiating systems and their optimization in view of electro-physical characteristics of the material medium and various modes of their excitation; investigation of wave processes and revealing physical conformities of formation of existential and amplitude-phase distribution of electromagnetic fields in near-field, intermediate and far zones of radiating systems; investigation offrequency-power characteristics and characteristics of directivity, spectra of frequencies, spatial, frequency, polarizing selection of excitable fields; miniaturization of radiators and multi-element systems of linear and circular (elliptic) polarization, calculation of their fields, including in a near zone, revealing of an possibility of spatial-power localization of fields in the material medium. Methods of investigation - theoretical investigations, the computer analysis, the experiment. The asymptotic solution of the integrate equation for a current in the thin impedance vibrator located in non-bounded homogeneous isotropic medium with losses and for the vibrator above the infinite perfectly conducting plane has been obtained and expressions for full fields of radiation of the vibrator are found; problems of excitation and radiation of the slot of an arbitrary length cut in a side surface of a rectangular waveguide and radiating into with losses medium have been solved; power characteristics and spatialdistributions of a near field of such slots have been investigated depending of parameters of material environments; the physical and mathematical model of a radiator as a radiator of the cross slots cut in the screen of a coaxial line, located in the medium with losses has been constructed; the system of the evolutionary equations which describes distribution of non-stationary electromagnetic waves in the infinite space, filled by the inhomogeneous non-stationary medium in longitudinal and inhomogeneous in cross directions has been obtained. ELECTROMAGNETIC FIELDS, DIFFRACTION, WAVEGUIDE-SLOT RADIATOR, DIPOLE RADIATOR, NEAR ZONE, ENVIRONMENT WITH LOSSES, THE NON-STATIONARY ELECTROMAGNETIC FIELD, MULTIELEMENT STRUCTURE, MICROWAVE HYPERTHERMIA. Product Description popup.authors popup.nrat_date 2020-04-02 Close