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Information × Registration Number 0303U001461, 0100U006421 , R & D reports Title Investigations of electromagnetic radiation of the Earth and planets of the solar system. Theory of difraction and propagation of electromagnetic waves. popup.stage_title Радіоспостереження планет-гігантів та накопичення даних. Створення ефективних алгоритмів розрахунку електромагнітих полів в задачах випромінювання та розсіювання хвиль при дослідженні провідних циліндрів, розташованих на шерехатій межі розподілу двох середовищ та мікрострічкових граток у магнітодиелектричному шарі. Head Lytvynenko Leonid Nikolaevich, Registration Date 18-03-2003 Organization Institute of Radio Astronomy of Sciences of Ukraine popup.description2 The new hardware for acousto-optic receiver was built, installed and tested at UTR-2. This device allow to perform observatons with higher sensitivity and lower confusion (correlation of two branches of this T-shaped array). This hardware be used for various programs in the future. In present time we have performed extensive obsevations of 20 candidate like Jupiter exoplanets during 40 winter nights of observation (providing good conditions with respect to man-made interference and ionosphere). About 1400 dynamic spectral acquisitions representing about 50 GB have been recorded in tht ranges 20-30MHz at UTR-2. We have developed a partly automated "single pulse detection" software for analysing UTR-2 dynamic spectra, including correlation of antenna response, interferense rejection, filtering, parametric dedispersion (DM=0 to 2 by step of 0.02). The efficiency of this software has been tested through simulations, and should enable us to reach a sensitivity of 10 milli Jansky with UTR-2. The problem ofradiation of line electric dipole arbitrary spaced near the slightly rough interface of two homogeneous half-spaces has been investigated. Two-dimensional electrical tensor Green's function has been built. This problem is a key one for diffraction problem of a metal cylinder placed near mentioned boundary when the method of integral equations is used. The perturbations of the boundary is taken into consideration in the boundary conditions only. By means of the Green function the integral equation in terms of a current are obtained in the case of H-polarized incident wave. The result is the scattered field characteristics with the influence of the rough surface. The mathematical model and algorithm of calculations for microstrip antenna arrays have been built in the case of rectangular metal radiators placed in multilayer dielectric substrate. This model is based on the spectral method and the given surface current approximation. The mutual coupling of patches is taken into consideration. The matching of elements with feeding lines is carried out. The influence of parameters of dielectric layers on radiating characteristics has been studied.5635 Product Description popup.authors popup.nrat_date 2020-04-02 Close