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1.  Millimeter wave rotational spectrum of the lower excited vibrational states of CH3CF2Cl
O.I. Baskakov, V.V. Ilyushin, E.A. Alekseev
molecule, rotational spectrum, interacting states, Hamiltonian, HCFC-142b
Vestnik KhNU 712 Pages. 3-9

The millimeter rotational spectrum of CH3CF2CI 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 111, 171, 181, 171181 and 111 states have been obtained for both chlorine isotopic species. In addition, the 1111, 182, 101, 161, 91 and 111181 vibrational states have been studied for CH3CF235C1 molecule. It was found the interaction between 101 and 161, and 91 and 111 181 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 712 Pages. 8-16

The relationship between complex dielectric permittivity of two-component 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 712 Pages. 17-20

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 metal-dielectric structures
V.A. Katrich, D.V. Mayboroda, S.A. Pogarsky, I.I. Saprykin
automation complex, dielectric image guide, energetic characteristics
Vestnik KhNU 712 Pages. 21-24

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, multi-frequency antenna, slot system, multimode rectangular waveguide
Vestnik KhNU 712 Pages. 25-29

The problem of radiation of electromagnetic waves by the double-frequency 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 712 Pages. 30-32

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 712 Pages. 33-36

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 712 Pages. 37-41

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 self-admittance 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, TEM-wave, radiation
Vestnik KhNU 712 Pages. 42-46

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 TEM-wave 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 712 Pages. 47-51

Systems of integral-differential 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 3-D morphology
T.V. Tishko, V.P. Titar, D.N. Tishko
digital holographic interference microscope, erythrocyte, morphology, sphericity coefficient, diagnostics, micro-object
Vestnik KhNU 712 Pages. 52-55

Results on the digital holographic interference microscope for 3-D 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 3-D 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 dual-mode circular waveguide excited by dominant and higher-order modes simultaneously
A.V. Shishkova, N.N. Gorobets
microwaves, multimode waveguide, diffraction, higher-order modes, Weinstein rigorous technique, Wiener-Hopf technique, radiation pattern.
Vestnik KhNU 712 Pages. 56-61

On the basis of Weinstein rigorous solution to the problem of electromagnetic mode diffraction at an open-ended circular waveguide the characteristics of radiation from multimode waveguides excited by H11 dominant mode and. higher-order modes (E01, and H01) 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 higher-order 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 712 Pages. 62-66

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 parallel-plate 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 712 Pages. 67-70

The known results connected with Green function representation by elliptical theta-function 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 712 Pages. 71-75

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 712 Pages. 76-79

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 iris-loaded circular waveguide concerning its eigenmode mutual transformations
He Shi, S.K. Katenev, S.N. Shulga
dispersion, Brillouin diagram, mode transformation
Vestnik KhNU 712 Pages. 80-83

The mutual eigenmode transformations are considered of a periodic iris-loaded 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 712 Pages. 84-90

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 closed-form 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 Klein-Gordon equation
Yu Zheng, B. A. Kochetov, A.Yu Butrym
Klein-Gordon equation, FDTD, finite difference equation, Laguerre impulse
Vestnik KhNU 712 Pages. 91-94

A finite difference algorithm for solving inhomogeneous Kleine-Gordon equation in Time Domain with arbitrary waveform pointwise source is considered in the paper. The numerical results were compared with analytical so-lution 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 712 Pages. 95-99

Problem of harmonic electromagnetic wave diffraction on a resistive cone with longitudinal slots is considered. The boundary problem solution uses the Kontorovich-Lebedev integral transform and a semi-inversion 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 712 Pages. 100-110

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 712 Pages. 111-114

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 35-40 GHz

23.  GaAs-Gunn diodes with small levels of power constitution for mm-range oscillators
E.D. Prokhorov, A.V. Dyadchenko, N.E. Polyansky
Gunn diodes, microwave powers, efficiency, generators mm-range
Vestnik KhNU 712 Pages. 115-118

Experimentally investigated small level operating power GaAs generators mm-range. 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 10-3W

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 712 Pages. 119-122

Electronic processes are considered at course of a current through semi-conductor 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, UHF-noise
Vestnik KhNU 712 Pages. 123-126

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 high-field 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 UHF-noise

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 712 Pages. 127-131

Based on the model considerations it was shown that irradiation of liquids containing gas inclusions with electromagnetic fields of "slowly-convective" intensity is conducive to the changes in the inclusion size

founded: 26 result (s)
Development - V.N. Karazin Kharkov National university