Теорія та техніка антен (ICATT 2009). – 2009 р.
Permanent URI for this collectionhttps://ena.lpnu.ua/handle/ntb/3740
Матеріали 7-ої Міжнародної конференції
У книзі зібрано матеріали конференції, присвяченої проблемам у галузі розробки і впровадження антен.
Теорія та техніка антен = Antenna theory and techniques : матеріали 7-ої Міжнародної конференції, 9–12 червня 2009 року, Львів, Україна. – Львів : Видавництво Національного університету "Львівська політехніка", 2009. – 400 с. : іл.
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Item Control of directional diagram of the inphase array for radiators of supershort radio impulses(Видавництво Національного університету "Львівська політехніка", 2009) Shostko, I. S.The method simultaneous excitation is considered of microwave oscillations in linear arrays of spark radiators. It is based on the voltage multiplication circuit’s usage. The influence is studied of the growing voltage along of antenna array and the switching time of dischargers in the array on performances of the directional diagram. The method of control directional diagram array is based on short-duration pulse shape properties. The beam direction depends on pulse radiators excitation parameters. The parameters experimental probing results are given for linear antenna array of spark radiators.Item The new method of electronic scanning(Видавництво Національного університету "Львівська політехніка", 2009) Khludneva, A.; Mikhailov, M.; Paslyon, V.We investigate the possibility of using the reversing mediums in the antenna engineering that gives us the ability to improve characteristics of the antenna systems; particularly we can receive the adjusted form and width of the directional diagram in the microwave range and we can also command the directional diagram while scanning within the adjusted rule.Item Plasmon antenna with complex profile of dielectric permittivity change(Видавництво Національного університету "Львівська політехніка", 2009) Hoblyk, V. V.; Nychai, I. V.; Liske, O. M.In given paper the results of development of the mathematical model of the plasmon antenna with complex profile of dielectric permittivity change are represented. The model is presented by some class of the branched continual fractions and describe the electrodynamics characteristics of such kind antenna's as functions of parameters of their construction. The results of the numerical and experimental researches of the antenna’s electrodynamics characteristics are resulted.Item Kravchenko-Rvachov probability distribution in the problems of analysis and synthesis for linear arrays(Видавництво Національного університету "Львівська політехніка", 2009) Kravchenko, V. F.; Kravchenko, O. V.; Safin, A. R.For the first time an applications of probability densities constructed on the atomic functions (AF) theory for analysis and synthesis for linear arrays are considered. Average characteristics of linear arrays with random phase errors are studied such as average directional diagram (DD), average directive gain (DG), beam width (BW), and side lobe level. Introduced errors correlation coefficient based on AF and the law of errors distribution is Kravchenko-Rvachov distribution. Correlation field characteristics are constructed for the cases when the probability densities of envelopes DD are Kravchenko-Rayleigh and Kravchenko-Gauss distributions. In this case a far-field boundary of antenna with random errors in gain-phase source distributions is defined. Thus a far-field is defined for two characteristics of antennas which are average DD and correlation fluctuations function of complex field An executed numerical experiment for the Gaussian and Kravchenko-Rvachov distribution as well as Kravchenko-Gauss has shown efficiency of introduced approach.Item Synthesis of 2D directional diagrams of antennas with arbitrary aperture based on atomic and R-functions(Видавництво Національного університету "Львівська політехніка", 2009) Kravchenko, V. F.; Kravchenko, O. V.; Safin, A. R.In this report problems of synthesis 2D directional diagram (DD) of antennas with arbitrary apertures on atomic and R-functions (V.L. Rvachov functions) are considered. A new approach for 2D DD synthesis based on generalized N-th dimensional Kravchenko-Kotel’nikov Theorems is offered. The theory of R-functions allows edge effects are appear in singularity points by synthesis and analysis of 2D antenna arrays with arbitrary forms. In this work was carried out comparison with well-known the following methods: Whittaker-Kotel’nikov-Shannon – series expansion, Fourier – series expansion, Chebyshev – series with series generalized Kravchenko-Kotel’nikov-Levitan.