1. Millimeter wave rotational spectrum of the lower excited vibrational states of CH_{3}CF_{2}Cl O.I. Baskakov, V.V. Ilyushin, E.A. Alekseev molecule, rotational spectrum, interacting states, Hamiltonian, HCFC142b Vestnik KhNU ¹712 Pages. 39
The millimeter rotational spectrum of CH_{3}CF_{2}CI has been investigated. The rotational, centrifugal distortion and quadrupole coupling parameters have been determined for the vibrational states with energies below 600 cm^{1}. Parameters of the ground and 11^{1}, 17^{1}, 18^{1}, 17^{1}18^{1} and 11^{1} states have been obtained for both chlorine isotopic species. In addition, the 1111, 18^{2}, 10^{1}, 16^{1}, 9^{1} and 11^{1}18^{1} vibrational states have been studied for CH3CF235C1 molecule. It was found the interaction between 10^{1} and 16^{1}, and 9^{1} and 11^{1} 18^{1} couples. The transition frequencies calculated with the parameters obtained coincide with the measured ones within experimental uncertainties.
2. Complex dielectric permittivity of disperse heterogeneous systems and their components L.M. Atroshenko, N.N. Gorobets, L.P. Safronova complex dielectric permittivity, disperse system Vestnik KhNU ¹712 Pages. 816
The relationship between complex dielectric permittivity of twocomponent disperse system, its components' volume shares and dielectric permittivity has been obtained. The method for computation of volume shares and dielectric permittivity of water solution hydrated inclusions is suggested
3. Method of finding permittivity, volume characteristics and hydratation of components of water solutions L.M. Atroshenko, N.N. Gorobets, L.P. Safronova dielectric permittivity, bound water, hydration, specific volume, density Vestnik KhNU ¹712 Pages. 1720
A method for calculation of permittivity of bound water, hydration of substances, volume shares and specific volumes of water solution components, based on data of measurements of the complex permittivity and solution densities, was suggested
4. Multifunctional measuring platform for investigations parameters of metaldielectric structures V.A. Katrich, D.V. Mayboroda, S.A. Pogarsky, I.I. Saprykin automation complex, dielectric image guide, energetic characteristics Vestnik KhNU ¹712 Pages. 2124
The multifunctional automation measuring platform for ultra high frequencies parameters definition has been de signed. The basis of this complex is the controlled mechanical platform which allows to measure the field amplitudes along two orthogonal coordinates. The processing of measuring date realizes with the help of special software. The measuring of energetic characteristics of radiating module based on dielectric image guide has been carried out
5. Radiation of electromagnetic waves by the system of transverse and longitudinal slots in the wide wall of rectangular waveguide S.L. Berdnik antenna array, multifrequency antenna, slot system, multimode rectangular waveguide Vestnik KhNU ¹712 Pages. 2529
The problem of radiation of electromagnetic waves by the doublefrequency multielement slot array on a multimode waveguide was solved by the Galerkin's method. The radiating aperture is two systems of longitudinal and transverse slots in the wide wall of the rectangular waveguide. The power and directional characteristics of such structure were investigated. Thickness of the waveguide wall, interior and exterior interactions between slots were taken into account at calculations
6. Stochastic fields optimal processing in MPSAR A.V. Ksendzuk multiposition system, synthetic aperture, stochastic model, combined estimation Vestnik KhNU ¹712 Pages. 3032
This paper represents optimal combined estimation algorithm in multiposition synthetic aperture radar as signed for estimation of the parameters, contained in correlation function of the complex scattering coefficient; the most important special cases were presented
7. Telemetering methods, devices and their application in vertebrology S.N. Kulish, O.Y. Kagan radiotelemetring research, transmitter, radio channel, implant devices, spine, impellent segments Vestnik KhNU ¹712 Pages. 3336
In the given job the review and the analysis of existing telemetering methods of research and diagnostics of various diseases in medicine is resulted. It is offered to use means of radiotelemetering research for registration of mechanical parameters arising on contact and lateral surfaces of impellent segments of a backbone. The block diagram of multichannel telemetering system is resulted and the basic requirements shown to this system are described
8. Longitudinal slot radiators cut in circular waveguide E.Y. Belogurov, V.A. Katrich, V.A. Lyaschenko circular waveguide, axial slot, electromagnetic waves, radiation, slot antennas Vestnik KhNU ¹712 Pages. 3741
Using method of magnetomotive forces investigations of behaviors of longitudinal slots that were cut in wall of the circular waveguide were carried out. Expressions of internal selfadmittance and transfer conductance were de rived. The possibility of creation of a tapered illumination that forms radiation pattern with low side lobes on long slot cut in circular waveguide was shown
9. Radiation of transient fields from the open end of coaxial waveguide with shifted internal conductor N.N. Gorobets, A.N. Dumin, O.A. Dumina transient field, coaxial waveguide with shifted internal conductor, TEMwave, radiation Vestnik KhNU ¹712 Pages. 4246
The problem of the radiation from the open end of coaxial waveguide with shifted internal conductor excited with transient source is solved in time domain. The incident into the aperture TEMwave in coaxial waveguide with time dependence in form of gaussian pulse is considered as a source. The influence of a flange on radiated field characteristics is examined. The application of dielectric insertions into the aperture for the increasing of radiation along normal to aperture is studied
10. Scattering electromagnetic waves by coupling aperture of electrodynamic volumes in presence of finite sizes impedance body M.V. Nesterenko impedance vibrator, narrow slot, distributed surface impedance, rectangular waveguide Vestnik KhNU ¹712 Pages. 4751
Systems of integraldifferential equations concerning surface equivalent magnetic and electrical currents which are excited with impressed sources of electromagnetic field in the coupling aperture of electrodynamic volumes and in the finite sizes impedance body have been obtained. The approximate analytical solution of the equations system for the narrow transverse slot in the broad wall of rectangular waveguide with the thin impedance vibrator was represented. Also theoretical and experimental graphs of electrodynamic characteristics of such structure in dependence on the wavelength in the base oscillations band the waveguide was represented
11. Application of the digital holographic interference microscope for investigation of human red blood cells 3D morphology T.V. Tishko, V.P. Titar, D.N. Tishko digital holographic interference microscope, erythrocyte, morphology, sphericity coefficient, diagnostics, microobject Vestnik KhNU ¹712 Pages. 5255
Results on the digital holographic interference microscope for 3D imaging of native blood erythrocytes are presented. Blood samples of healthy people and patients with different pathologies were used. Three basic morphology kinds of blood erythrocytes were detected. A sphericity coefficient was used as quantitative characteristics of blood erythrocytes morphology. It is shown that, blood erythrocytes 3D morphology is very important diagnostics characteristics in medical practice. The digital holographic interference microscope is an effective device for the purposes of medical diagnostics
12. Radiation from dualmode circular waveguide excited by dominant and higherorder modes simultaneously A.V. Shishkova, N.N. Gorobets microwaves, multimode waveguide, diffraction, higherorder modes, Weinstein rigorous technique, WienerHopf technique, radiation pattern. Vestnik KhNU ¹712 Pages. 5661
On the basis of Weinstein rigorous solution to the problem of electromagnetic mode diffraction at an openended circular waveguide the characteristics of radiation from multimode waveguides excited by H_{11} dominant mode and. higherorder modes (E_{01}, and H_{01}) simultaneously are calculated and analyzed. The calculation of radiation from waveguide with dual mode excitation is carried out in the whole observation space and in wide frequency bandwidth, taking into account the higherorder mode transformation and currents leaking on the external surface of a waveguide.
13. Absorption of electromagnetic energy of dipole antenna of double layer dielectric sphere V.V. Radchenko wave absorption, double layer dielectric sphere, perfectly conducting spherical screen, radial dielectric dipole, dual series equations, method of analytical regularization Vestnik KhNU ¹712 Pages. 6266
Considered the problem of electromagnetic energy absorption by double layer sphere, which the simplified model of human head protected by the helmet with the dipole antenna. This investigation is interesting due to control of energy absorption in sensible parts of human head tissues. The problem is solved by method analytical regularization, which reduces the problem to the system of linear equations of Fredholm second kind which provides guaranteed convergence. Basic absorption characteristics are obtained and comparison of protection effectiveness for different sizes helmets are made
14. Integral representation of green function in parallelplate and rectangular waveguide, and in resonator as well V.A. Katrich, F.S. Novokhatsky waveguides, Green function, fundamental solution, radial function, elliptical teta function, image method, calculus of residues, integral transformation, grating, formal variative Vestnik KhNU ¹712 Pages. 6770
The known results connected with Green function representation by elliptical thetafunction are generalized. New representations of Green function for some widely used types of waveguides are obtained. Earlier, these Green functions are presented either in form of series with nonuniform convergence or in form of integrals containing Hancel functions, which are reduced to asymptotic expressions in far zone. On this work integral representations of Green functions are obtained for Cases where the quadrature formula exists. The method of analytical continuation with parameter is applied
15. Features of forming patterns of planar antennas arrays A.A. Bulgakova, N.N. Gorobets, V.A. Katrich, V.A. Lyashenko planar arrays, pattern, sidelobes, radiator elements, interference maximums triangular grid Vestnik KhNU ¹712 Pages. 7175
Computer analysis results of an influence of a radiating aperture form of the planar array on its pattern have been presented. It is shown that there is dependence of levels of interference lobes and also near and far sidelobes of pattern in one of main positions of observation planes on number and radiators in plane which is orthogonal to main observation plane
16. Modelling of holographic radar with discrete and continuous aperture B. Kochetov, A. Butrym holographic radar, method of maximum likelihood, point scatter Vestnik KhNU ¹712 Pages. 7679
Images of a point scatter are investigated that are obtained with a model of holographic radar with discrete and continuous aperture, under illumination with planar or spherical wave. Main features of the scatter image are revealed and their dependence on parameters of the radar (aperture dimensions, elements spacing in the gratings, type of illumination) are studied
17. The influence of the inner chanal of a periodic irisloaded circular waveguide concerning its eigenmode mutual transformations He Shi, S.K. Katenev, S.N. Shulga dispersion, Brillouin diagram, mode transformation Vestnik KhNU ¹712 Pages. 8083
The mutual eigenmode transformations are considered of a periodic irisloaded circular waveguide against variations or its inner radius, using BriUouin diagram characteristics. The specific features of the waveguide regular and periodicity modes of Eo,and asymmetric waves are pointed out
18. Analytical solutions in time domain for electromagnetic fields in a cavity with Debye medium M.S. Antyufeyeva dielectric, dispersion, Debye medium, electromagnetic fields in a cavity with a dielectric, evolutionary approach to electromagnetics, time domain Vestnik KhNU ¹712 Pages. 8490
The theoretical investigation of the properties of electromagnetic oscillations in a cavity with Debye medium is carried out. The problem is considered within the frame of the Analytical Approach to Electromagnetics in the Time Domain (TD), which allows obtaining closedform solutions in TD for a wide range of electrodynamical problems. For the description of electromagnetic properties of the medium is used representation of the constitutive relation in an integral form. The analytical solutions are obtained for the several excited functions in TD and they validity conditions are defined. Characteristics of electromagnetic oscillations are presented for different relaxation time and dielectric susceptibility
19. The finite difference scheme in time domain (FDTD) and analytical solution to KleinGordon equation Yu Zheng, B. A. Kochetov, A.Yu Butrym KleinGordon equation, FDTD, finite difference equation, Laguerre impulse Vestnik KhNU ¹712 Pages. 9194
A finite difference algorithm for solving inhomogeneous KleineGordon equation in Time Domain with arbitrary waveform pointwise source is considered in the paper. The numerical results were compared with analytical solution that was obtained using Laplace transformation in a convolution operator form. The results confirm validity of both the obtained numerical algorithm and the analytical solution
20. Electromagnetic wave detraction on a resistive unclosed cone V.A. Doroshenko, O.G. Litvinova diffraction, resistive, longitudinal slots, an integral transform, analytical solutions Vestnik KhNU ¹712 Pages. 9599
Problem of harmonic electromagnetic wave diffraction on a resistive cone with longitudinal slots is considered. The boundary problem solution uses the KontorovichLebedev integral transform and a semiinversion method. Analytical solutions are obtained for the cone with a lot of narrow slots and reactive impedance. Impedance and longitudinal slots effects on scattering field structure is studied
21. On experimental substantial of special relativity theory A.P. Volchenko competing hypotheses in the Lorentz transformations treatment, experiments in their testing Vestnik KhNU ¹712 Pages. 100110
Competing hypotheses in the Lorentz transformations treatment mentioned in works of H.Puankare have been considered. Experiments in such hypotheses testing have been commented upon. The conclusions are made about insufficient experimental substantiations of the competing hypotheses accepted in special relativity theory. Alternative definition of the Lorentz transformations and relativity mechanics equations have been specified.
22. Impedance of connected in series diodes with difference negative conductivity E.D. Prokhorov tunnel diode, negative conductivity, frequency range Vestnik KhNU ¹712 Pages. 111114
The impedance connected in series negative difference conductivity diodes in wide frequency range are analyses. There are frequency region that diodes combination work have been appeared. The operation frequencies for combination of tunnel diodes are 3540 GHz
23. GaAsGunn diodes with small levels of power constitution for mmrange oscillators E.D. Prokhorov, A.V. Dyadchenko, N.E. Polyansky Gunn diodes, microwave powers, efficiency, generators mmrange Vestnik KhNU ¹712 Pages. 115118
Experimentally investigated small level operating power GaAs generators mmrange. Samples of diodes made in Problem laboratory of semiconductor engineering of the Karazin Kharkov National University. GaAs Gunn diodes oscillators operated in continuous mode. The obtained experimentally operated powers made 10...30 mW, the useful microwave powers  0,1...0,3 mW at an efficiency of 1...2 % over the range frequencies of 60...75 GHz. Probably further reduction consumed by diodes and oscillators of power up to hundreds and tens 10_{3}W
24. Same question of modeling of tunnel contact semiconductor structure O.V. Botsula, E.D. Prokhorov tunnel cathode, negative differential conductivity, contacts, current  voltage characteristics, cathode, anode Vestnik KhNU ¹712 Pages. 119122
Electronic processes are considered at course of a current through semiconductor structure with the tunnel cathode. The approach to modelling the structures including as a component tunnel geterojunction is offered. Static characteristics of structures to a basis geterojunction GaAs/AIGaAs received with application of the offered technique are resulted
25. The spectrum of current oscillations of Gunn diodes with the impact ionization in moving domains D.V. Pavlenko, E.D. Prokhorov Gunn diode, impact ionization, UHFnoise Vestnik KhNU ¹712 Pages. 123126
The results of the numerical simulation of the GaAs Gunn diode with electric field strengths, enough for development of the impact ionization in the moving highfield domains, are presented. The form of current oscillations and frequency spectrums is in good agreement with experimentally measured data. It is shown that the Gunn diode, operating under conditions of the impact ionization, may be used as a source of wide spectrum UHFnoise
26. Stimulation of the size evolution of the gas includes in a liquid by electromagnetic waves B.G. Yemets electromagnetic waves, air bubbles in liquid, temperature field, convection Vestnik KhNU ¹712 Pages. 127131
Based on the model considerations it was shown that irradiation of liquids containing gas inclusions with electromagnetic fields of "slowlyconvective" intensity is conducive to the changes in the inclusion size
founded: 26 result (s)
