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Information × Registration Number 0203U008103, 0100U003346 , R & D reports Title Investigation of physical peculiarities and mathematical simulating the radiating systems based on irregular and nonatationar diffraction structures popup.stage_title Head Gorobec N., Katrich V., Registration Date 22-04-2003 Organization Kharkov National University named after V.N.Karazin popup.description2 The object of investigations: electromagnetic fields, diffraction phenomena andb wave processes in case of scattering the waveguide waves both the one-slot irregularities and arrays of ones. Goal of investigations - designing and accurate definition of calculation methods, mathematical models and software for calculating the characteristics of linear, curvilinear, longitudinal regular and irregular slots and slot arrays. The technique of investigations - theoretical researches, computer analysis, experiment. Expressions of electromagnetic fields were obtained and energy and directional characteristics of curvilinear slots cut in wals of a rectangular waveguide were calculated. By the magnetic motive force method the energy characteristics of the radiator in form of two neighboured lohgitudinal slots situated on the wide walls of a rectangukar waveguide were investigated. The energy and directional characteristics of the electrically long longitudinal slots in wide and narrow walls ofthe one-mode and polymodal rectangular waveguides of slots. The energy characteristics of the inclined slot cut on all width of the narrow wall of a rectangular waveguide were calculated. Analytical expressions of scattering matrix elements of the slot joints of rectangular waveguides were obtained. The electrodynamic characteristics of the transvere and longitudinal slots situated in the common wall of two one-mode waveguides of equal sizes were investigated. The problem of synthesis of plane curvilinear arrays was investigated by numerically. It is shown the offered technique is more effective in comparison with other known methods: gradient and variational ones. The travelling wave antenna arrays with two-channel excitation which provide stability of directional and energy characteristics in more wide frequency band than linear antennas were investigated. The results the work will be recommended for use in Institute for Scientifical Research of the National Academy of Science of Ukraine and in the scientifical -industrial organizations designing the radioelectronic systems of communication, monitoring environment, radar and TV systems for solving problems of increasing the antenna efficiency. Product Description popup.authors popup.nrat_date 2020-04-02 Close