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 State-of-the-arts reconfigurable antennas – principles, devices, applications(Видавництво Національного університету "Львівська політехніка", 2009) Yashchyshyn, Y. M.The paper provides an overview of the state of the art the area of smart antennas, and is particular focused on the reconfigurable antennas as the devices the most quickly developing during in recent years. This article brings together in a review manner a comprehensive summary of high quality research contributions across basic and applied sciences. As a result a broad spectrum of topics is covered reflecting the areas in which Institute of Radioelectronics’s expertise is a worldwide recognized. The transdisciplinary nature of most areas aims to stress a sense of purpose in the work developed.Item Metamaterials on antenna solutions(Видавництво Національного університету "Львівська політехніка", 2009) Slyusar, V. I.This report describes the theory of metamaterials and its utilization for antenna's techniques. Metamaterials exhibit qualitatively new electromagnetic response functions that can not be found in the nature. The present report reviews basic historical aspects of the meta-environments theory development. Also the role of Veselago, the well-know theorist of negative refraction index metastructures whose 80 anniversary is celebrated in present year is emphasized as well as the role of other scientists.Item Direction of arrival estimation with sensor arrays(Видавництво Національного університету "Львівська політехніка", 2009) Czapska, J. M.; Yashchyshyn, Y.With recent increase of hardware capabilities, the application of sensor arrays in the Direction-Of-Arrival estimation is gaining more and more popularity. The behaviour of the array is the complex function of the geometry, sensor characteristic, signal and noise properties and other different factors. Before building the array it is essential to simulate its performance in different conditions with different algorithms. Most of the time the simulations are performed using custom ad-hoc created code. This code is error prone and difficult to maintain. Our goal was to create a reusable and extensible library that would provide the components used in the simulation process. In this paper we present the initial version of the library along with several illustrative examples.Item Compact multibeam reflector antenna for satellite TV signal receiving(Видавництво Національного університету "Львівська політехніка", 2009) Vesnik, M. V.A design concept of a compact multibeam reflector antenna for satellite TV signal receiving is proposed. Different reflector shapes are discussed. Results of trial calculation are presented.Item The linear polarized horn antenna with decreased effective scattering area(Видавництво Національного університету "Львівська політехніка", 2009) Manoilov, V. P.; Pavluk, V. V.; Sidorchuk, O. L.; Karashchuk, N. N.The linear polarized rectangular horn antenna with decreased effective scattering area construction is offered. The method of the horn antenna excitation by the longitudinal slot is proposed. Reduction of the effective scattering area is achieved by absorption of the higher wave modes excited by a falling wave.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 Development of the radiating part of an ultra-wideband tapered-slot antenna for GPR applications(Видавництво Національного університету "Львівська політехніка", 2009) Maksimovitch, Ye.; Mikhnev, V.; Vainikainen, P.This paper presents some techniques of improving characteristics of planar ultrawideband antennas based on the tapered slot line. Different antenna openings based on the elliptical taper with additional metal flares, smooth and corrugated bent blades had been studied. Several planar antennas with dimensions of 23 to 12 centimeters have been simulated using electromagnetic simulation software, and then designed, fabricated and tested. Results of computer simulations and measurements of the ultra-wideband antenna characteristics are presented.Item The research of antennas on the cold plasma(Видавництво Національного університету "Львівська політехніка", 2009) Ovsyanikov, V. V.; Jakimenko, S. V.; Moroz, S. M.The results of researches internal and external characteristics of loop and rod antennas on the basis of cold plasma gas discharge are presented. The rows of advantages of such antennas above the metallic ones have been pointed.Item A new approach to analysis of curvilinear conducting surface radiators(Видавництво Національного університету "Львівська політехніка", 2009) Dubrovka, F. F.; Tolkachov, O. V.We present a new approach to analysis of curvilinear perfect conducting surface radiators. The feature of this approach is a formulation of boundary value problem as a system of integral equations in regard to the complex electrodynamic vector potential and the scalar potential and simultaneous solution of this system for unknown distributions of current density vector and charge density using technique of parametrical mapping for representing curvilinear surface and the Galerkin’s method with boundary elements. Advantages of the approach in comparison with the Harrington integral equation on example of surface current distributions at the third order surface (Ferguson’spatches) are demonstrated.Item Circular polarization antenna for CW V-band radar(Видавництво Національного університету "Львівська політехніка", 2009) Kashin, S. V.Practical realization of the circular polarization antenna for CW V-band radar is described.Item Mutual interaction between Vee-dipoles placed over the interface between two media(Видавництво Національного університету "Львівська політехніка", 2009) Panchenko, Yu. A.A system of two Vee-dipoles with sinusoidal current distribution placed over a flat interface between two isotropic media which one of them is dissipative is considered. Each dipole arm as an independent radiator is considered. The method of induced EMF to find the mutual impedances between the dipoles arms is used. The voltages at the inputs of the dipoles arms are presented in a system of Kirchhoff’s equations which allows obtaining the mutual impedances between the dipoles. The computation results for the mutual impedances between two Vee-dipoles are given.Item An optimized MAS for solving scattering problems(Видавництво Національного університету "Львівська політехніка", 2009) Capozzoli, A.; Liseno, A.; Vinetti, P.; Curcio, C.; De Bono, G.; D’Elia, G.A new criterion driving the choice of the locations of the Auxiliary Sourcers (AS) is introduced with the aim to improve the performance of the Method of Auxiliary Sources (MAS) applied to the solution of the integral equations as those encountered in electromagnetic scattering. The approach is based on the optimization of the singular value behavior of the matrix relating the AS excitations and the scattered field values at the matching points on the scatterer boundary. The ill-conditioning of the problem of determining the AS excitations matching the boundary conditions is then significantly reduced and the accuracy of the estimated scattered field is improved. The performance of the method is numerically assessed, in a 2D scalar geometry, by discussing in the details the case of a circular perfectly conducting scatterer.Item The fast converging method of calculation of wire radiators in infinite planar phased antenna array(Видавництво Національного університету "Львівська політехніка", 2009) Kudzin, V. P.The effective fast converging method of calculation of wire radiators in infinite planar phased antenna array is developed. The method is based on use of Green’s function submitted as double series with accelerated convergence. The moment method is applied and piecewise sine basic and weight functions automatically satisfied to Kirchhoff’s current law are used. Expressions for impedance matrix elements consist of two series. Members of the series generated by spectral part of Green’s function are represented as the closed analytical expressions. Members of series generated by spatial part of Green’s function are calculated numerically by one-fold integration.Item Computational methods in mathematical and computer modeling of electromagnetic field distribution behind the grate of scatterers(Видавництво Національного університету "Львівська політехніка", 2009) Otdielnov, V. A.The paper is devoted to the modeling of electromagnetic field distribution behind the grating of scatterers. The electromagnetic directivity diagram is simulated by hardware. The mathematical and technical design of electromagnetic field distribution in presence of one and a few scatterers, also as with regulations changes of the last ones is realized. The results can be used and allowed for antenna industries, radio station elements and other radio technical facilities manufacturing.Item Research of multiantenna systems of telecommunication networks(Видавництво Національного університету "Львівська політехніка", 2009) Klimash, M. M.; Pelishok, V. O.; Yaremko, O. M.In the given work different types of multiantenna systems are investigated: with several aerials on transferring or on the reception party, and also on both parties simultaneously (MIMO, Multiple Input Multiple Output). Different kinds of processing of signals, as on transferring (STBC, Space-Time Block Coding) and on reciving to the party (BLAST, Bell Laboratories Layered Space-Time) are considered. Influence of multiantenna systems on the basic indicators of wireless neetworks (probability of occurrence of bit errors, speed of transfer data) is investigated.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 Polarization selective antennas for reflected wave depolarization determination(Видавництво Національного університету "Львівська політехніка", 2009) Averyanova, Yu. A.; Yanovsky, F. J.; Averyanov, A. A.In this paper the approach to estimate dynamic processes in the atmosphere with help of polarimetry as well as multi-antenna polarimetric radar system is considered. The requirements to polarization selective antennas parameters are discussed.Item Thin vibrators with arbitrary excitation and surface impedance(Видавництво Національного університету "Львівська політехніка", 2009) Nesterenko, M. V.; Katrich, V. A.; Dakhov, V. M.; Berdnik, S. L.The approximate analytical solution of the integral equation concerning the current in a thin straight vibrator with variable complex surface impedance has been obtained. The vibrator is located in unlimited space and is excited by the arbitrary field of impressed sources. For the case of vibrator’s excitation in the distinct from the centre point along its length the calculations have been carried out and the plots of electrodynamic characteristics of the vibrator, depending on the magnitude and the type of its surface impedance and location of the point of excitation, are presented.Item The process of recovery of cell membrane damage produced by the low-level microwave radiation(Видавництво Національного університету "Львівська політехніка", 2009) Pasiuga, V. N.; Shckorbatov, Yu. G.; Kolchigin, N. N.; Ivanchenko, D. D.; Bykov, V. I.The process of cell membrane recovery after the influence of microwave radiation (f = 36.64 GHz, E = 10, 100, 400 μW/cm2, irradiation time 10 s) on human buccal epithelium cells was investigated. The stainability of cells with indigo carmine (5 mM) or trypan blue (0,5 %) after 5 min of staining was investigated. It was shown irradiation to be induced decrease of percentage of unstained cells. Recovery of cell membrane permeability after microwave irradiation was shown. Cell recovery after microwave irradiation of low intensity (10 μW/cm2) was shown after 1 h. Microwave irradiation of higher intensity (100, 400 μW/cm2) induced more strongly effects of cell membrane permeability. Cell recovery after microwave irradiation of higher intensity was shown after 3 h. For the first time recovery of cell membrane after microwave irradiation of low intensity was shown.Item Shaping coverage using antenna arrays for load-balancing in cellular networks(Видавництво Національного університету "Львівська політехніка", 2009) Wu, J.; Dubrovka, R.; Bigham, J.; Jiang, P.In this article the authors investigate shaping coverage cooperatively in a macro-cell environment and evaluate the benefits using real antenna models. Each antenna in this proposed scheme is an adaptive array equipped with the capability to re-configure and shape power patterns through power pattern synthesis. Patterns are formed cooperatively to control coverage and balance and maximize overall network capacity. A range of antenna models are tested in this paper using an ideal optimal synthesizer and verified using a system-level WCDMA simulator. The results are.