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Information × Registration Number 0212U000987, 0109U009071 , R & D reports Title Theoretical and experimental research of noise immunity of receiving antennas of the ground and space radiocommunication systems popup.stage_title Head Lobkova Ljubov Mihajlovna, Registration Date 24-07-2012 Organization Sevastopol National Technical University popup.description2 The report on research scientific work: 109 pp., 54 fig., 15 tab., 21 references. Object of research - ground both satellite communication channels and spiral antennas. The work purpose - development of statistical model of the diffraction antenna radiation field with the account of influence of turbulent atmosphere. In the report for 2011 y. following results are presented. 1. The Method of definition of floor-space ratio caused by influence of turbulent atmosphere, for the receiving antennas applied on ground and space lines of a radio communication. 2. Results of the analysis of influence of amplitude and phase fluctuations of an electromagnetic wave on distribution of mean intensity of a field in a focal plane of the receiving antenna. 3. The Approach to optimisation of the aperture of the horn used as an irradiator of the receiving parabolic antenna. 4. Results of the theoretical analysis of fields space coherence in a focal plane of the receiving antenna depending on peak and phase fluctuations of the field. 5. Results of the analysis of laws of field's distribution in the focal plane of the receiving antenna depending on the sizes of the aperture of the transmitting antenna, a condition of real turbulent atmosphere and length of a wireless link. 6. Laws of distribution for field envelope in the focal plane of the receiving antenna which will allow to define statistical characteristics of receivable signals and to estimate depth of fading of signal on the given wireless link. 7. Results of theoretical research of characteristics of the dual-lead in-phase regular cylindrical helix antenna. 8. Results of theoretical research of characteristics of the four-way irregular cylindrical helix antenna at quadrature feeding of helix irradiators. 9. Recommendations for choice of optimum geometrical parametres of the four-way irregular cylindrical helix antenna for formation of various modes of field radiation with circular polarisation. 10. Results of theoretical research of the triple conic spiral antenna with control of the radiation field polarisation. 11. Recommendations for choice of optimum geometrical parametres of the triple conic spiral antenna for control of the radiation field polarisation. 12. Results of an experimental research of characteristics of the irregular cylindrical helix antenna. 13. Model of the four-channel band quadrature phase shifter. 14. Results of designing of the stand for calibration of distributive system of the multiple-thread spiral antennas. Results of work can be used by development of diffraction antennas with the big electric sizes, intended for use in telecommunication systems, in a radar-location and radio astronomy. Product Description popup.authors Барашова Ольга Миколаївна Головін Владислав Вікторович Лук'янчиков Андрій Володимирович Тищук Юрій Миколайович Троїцький Олександр Вікторович popup.nrat_date 2020-04-02 Close