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Information × Registration Number 0218U002191, 0115U002390 , R & D reports Title Electromagnetic models of structures with resonant properties and holographic methods of measurements in the microwave range popup.stage_title Head Drobakhin Oleg Olegovich, Доктор фізико-математичних наук Registration Date 30-01-2018 Organization Oles Honchar Dnipro National University popup.description2 The object of the study is the regularities of the processes of scattering of electromagnetic waves in the microwave band by dielectric and metallic resonance structures. The purpose of the research is to detect the regularities of the processes of scattering of electromagnetic waves in the microwave band by dielectric and metal structures with resonant properties and to develop the theoretical foundations for the application of a holographic approach to measurements in the microwave band and the processing of signals in the time, frequency and spatial domains. The method of transfer matrices for the analysis of layered structures; method of least squares approximation by polynomials with non-integer powers; Cauchy's method and the method of selective interpolation of approximation by the relation of polynomials; methods of modern spectral analysis for approximation by the sum of exponential functions; the method of neural networks are used as research methods. New methods for approximating the frequency dependences of the elements of scattering matrices of waveguide inhomogeneities and approximating the inverse problem of microwave detection are developed. New parameters are proposed for transforming the shape of wave impulses, beams, and wave packets, which are implemented for analysis of Bragg resonance in quasi-periodic layered structures, in particular, with losses. The new local form of expansion with plane waves has extended the range of applicability with simultaneous reduction of computer costs. The method of synthesizing the aperture in combination with the Fourier-holography method for multifrequency signals in a wide frequency band using the generalized inverse filtering in the spatial domain has been experimentally implemented. The results of the research are used into the educational process carried out by the Department of Applied and Computer Radiophysics of the DNU. The results of the work can be used by research institutes and organizations of the electronic industry and implemented in such areas of technology as nondestructive testing, radiolocation, space and mobile communications, information and computer systems. Product Description popup.authors Євчик Антон Володимирович Андрєєв Михайло Вікторович Борулько Валентин Федорович Салтиков Дмитро Юрійович Філінський Леонід .Антонович popup.nrat_date 2020-04-02 Close