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Information × Registration Number 0210U001059, 0107U001340 , R & D reports Title Theoretical and experimental research of statistical characteristics of the surface and space radio communication systems antennas popup.stage_title Head Lobkova Lubov Mihailovna, Registration Date 20-01-2010 Organization Sevastopol National Technical University popup.description2 An object of research - diffraction antennas. A research objective - development of statistical model of the aperture antenna considering influence of constructive uncertainties and casual characteristics of atmosphere. Were used the method of the phase screen, turbulence's Gaussian model, the total field's mean value in a reception place was defined on the basis of Vvedensky's two-dimensional model. Novelty. The engineering technique for definition of characteristics of developed reflector antennas at propagation of radio-waves to the environment with a variable indicator of refraction taking into account underlying surface is offered. The technique is developed for two-dimensional apertures with big electric dimensions. Theoretical and experimental results: 1) the model of slow and fast fluctuations of wave angle arrival is offered. 2) formulas for an definition of the space coherence of antenna with inphase equal-amplitude distribution in its aperture are deduced. 3) the mathematical model of the transferring antenna's two-dimensional aperture radiation is presented. 4) research of the average radiation patterns taking into account influence of atmospheric turbulence is conducted, at various antenna aperture field's distributions. 5) the statistical model for a case when antennas are located near to uneven surface is offered. 6) the analysis of the signal spectrum width influence on aperture antenna radiation characteristics is carried out. 7) the antennas executed on the basis of spiral radiators are developed. 8) experimental researches of the spherical reflector antenna radiation patterns are spent. The range of application of the obtained results: Systems of a space and surface radio communication with mobile objects, radar guidance systems, radio navigation, radio astronomy, TV, measuring radio systems of a high precision. Product Description popup.authors Головін В.В. Лобкова Л.М. Лук'янчиков А.В. Тищук Ю.М. Троіцький О.В. popup.nrat_date 2020-04-02 Close