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Information × Registration Number 0222U001302, 0119U101221 , R & D reports Title Methods of research and models of processes of interaction of electromagnetic waves of microwave and terahertz ranges with radio-physical objects popup.stage_title Head Drobakhin Oleh O., Доктор фізико-математичних наук Registration Date 26-01-2022 Organization Oles Honchar Dnipro National University popup.description2 The object of research is the is the physical laws of interaction of electromagnetic waves of microwave and terahertz bands with objects in cutoff resonators, in dielectric Bragg structures, in antenna systems and microwave measurement methods. The purpose of the research is to establish the physical laws of the processes of interaction of electromagnetic waves of the microwave and terahertz bands in cutoff resonators, in dielectric Bragg structures, and improving measurement methods. Research methods - the method of wave scattering and transmission matrices; methods of Green's functions; discrete Fourier transform methods; experimental methods of measurements in the microwave range. A method for measuring the dielectric constant of gases using coupled biconical resonators has been developed. Requirements for the cylindricality and coaxiality of the investigated samples are formulated to ensure the required accuracy of measuring the dielectric constant of crystalline and glass-ceramic dielectrics. Conclusions on the applicability of EH211 mode for measuring the complex dielectric constant of solid dielectrics are formulated. It is established that the use of diffraction screens together with axisymmetric antennas can significantly reduce the level of side lobes. Step inhomogeneities in the waveguides of antenna arrays can reduce the loss of electromagnetic energy. Planar F-shaped antenna with L-shaped cut provides two operating frequency bands on which you can organize two telecommunications channels. The formation of the reflection response in the time domain by the Bragg structure, and the formation of a negative group delay in lossless Bragg structures associated with the property of minimal-phase is revealed.The results of the work can be implemented in such areas of technology as non-destructive testing, material diagnostics, radar, space and mobile communications, information and computer systems. Product Description popup.authors Yevchik Anton V. Andreev Mykhaylo V Drobakhin Oleh Olehovych Mahro Vakerii I Saltykov Dmytro Yu. popup.nrat_date 2022-03-09 Close