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.
Browse
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 Antenna array development with non-linear signal processing(Видавництво Національного університету "Львівська політехніка", 2009) Lobkova, L. M.; Lukjanchikov, A. V.The method of build-up of antennas arrays with non-linear processing of received signals is offered, i.e. A correlation method which is applied not only to casual stationary processes, but also for the determined signals. Formulas for pattern diagram calculation are output.Item The broadband multichannel UHF transmitting TV antenna(Видавництво Національного університету "Львівська політехніка", 2009) Kudzin, V. P.; Sannikov, N. J.The broadband multichannel UHF transmitting TV antenna consisting of shunt dipoles is offered. The antenna works on several frequency channels simultaneously. The detailed numerical and experimental research is carried out and the geometry of the antenna is optimized. The structure of the antenna includes two orthogonal planes of radiators, the power divider and matching device. The industrial sample of the aerial is created.Item Interacting of the wire antennas which have been had in the near-field region, with the account underlaying surface(Видавництво Національного університету "Львівська політехніка", 2009) Chekan, S. A.Method of the integrated equations in thin-wire approach the problem of the analysis of agency of two wire antennas which have been had in the near-field region under the relation each other dares. The flat underlaying surface models or a semiconducting surface of the Earth, or a building roof on which antennas are had. Interacting of antennas is manifested in change of their antenna pattern, polarisation, coefficient of amplification and entrance resistance that it is necessary to consider at the organisation of communication centres.Item Antenna synthesis based on the ant colony optimization algorithm(Видавництво Національного університету "Львівська політехніка", 2009) Slyusar, V. I.; Ermolaev, S. Y.This report are described the versions and the synthesis results of new designs of electrically small antenna based on ant colony optimization algorithms. To study the parameters of the frame and non-loopback vibrators MMANA package was used. Geometric forms that were obtained might be used as contour lines of printed, slot antenna or as forming surface of the crystal dielectric resonator antenna. A constructive meta-heuristic search algorithm for optimization of the antennas forms using solutions of travelling salesman problem (TSP).Item Mathematical models of the radiating and waveguide structures with N-fold periodicity(Видавництво Національного університету "Львівська політехніка", 2009) Hoblyk, V. V.In present article the results of development of the mathematical models of the wide class of radiating and waveguiding structures of divisible periodicity of constructive parameters are represented.Item Modelling of street radio links as Microwave Multiports at work of system WIMAX in the conditions of the city(Видавництво Національного університету "Львівська політехніка", 2009) Strelnitskiy, A. A.; Tsopa, A. I.; Shokalo, V. M.The approached method of calculation of attenuation of radio-waves along street wave channels with the help canyon radio waves propagation (RWP) models and the Microwave Office packet of applied programs has been developed. The comparative analysis of the results of calculation and experiment for a case of WiMAX system operating in the central area of Kharkiv has been supplied.Item An excitation of the linear antenna by the relativistic charge in the circular waveguide(Видавництво Національного університету "Львівська політехніка", 2009) Prijmenko, S. D.; Rjabkova, E. P.Excitation of a linear impedance antenna is considered in a unlimited circular waveguide. The antenna is located in the waveguide axis and is excited by the relativistic point charge scattered at the antenna end-wall. The electric current distribution and the charge linear density distribution along the antenna are calculated. The delta-shaped representation of a current on one of the antenna ends at the initial instant of time is given. The Green's function of an unlimited circular waveguide, and also the direct and inverse Fourier transform in time domain are used.Item The electromagnetic waves diffraction by bounded and semi-infinite sequences of plane screens with slot(Видавництво Національного університету "Львівська політехніка", 2009) Kaliberda, M. E.; Pogarsky, S. A.; Phenichnaya, S. V.The diffraction problem of electromagnetic waves by the systems of plane screens with slot was considered. The operator approach was used. The possibility of eigenwaves propagation between screens was took into consideration. The dependencies of reflection and transmission coefficients of structure and excitation coefficient of plane waveguides from the distance between screens were investigated.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 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 A low phase noise microstrip push-push oscillator with third harmonic output(Видавництво Національного університету "Львівська політехніка", 2009) Kotserzhynskyi, B. O.; Omelianenko, M. U.; Tsvelykh, I. S.The results of the low noise microstrip oscillator design with 11 GHz output are presented in the paper. The oscillator is stabilized by the microstrip resonator and performed in the push-push circuit. In contrast to traditional even harmonics output, the third harmonic output is used, which is obtained by means of proposed 0-180° combiner unit at the oscillator‟s output. The use of third harmonic output signal made it possible to suppress even harmonics in the oscillator branches, which contributed to the phase noise reduction. Phase noise of the designed oscillator is measured to be no more than -92 dBc/Hz, -113 dBc/Hz, and -130 dBc/Hz at 10 kHz, 100 kHz, 1 MHz offsets from carrier, respectively.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 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 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 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 Combined antenna for a mobile system of radioacoustic sounding(Видавництво Національного університету "Львівська політехніка", 2009) Ulyanov, Y. N.; Misajlov, V. L.; Vetrov, V. I.Combined radar-acoustic horn-reflector antenna has been developed for a mobile radioacoustic and acoustic sounding system. The antenna beamwidths at acoustic and electromagnetic waves are equal. The system works according to the inclined radioacoustic method (IRAS) and is intended for measuring profiles of temperature, wind and atmospheric turbulence intensity at the heights of about 500 m.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 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 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.