Y.K. Sirenko and L.G. Velychko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
Time-Domain Methods in the Study of Composite
Open Resonance Structures
The paper discusses the methodological questions arising
in the study of open quasi-optical devices with resonance
structures as selective elements. The spread in characteristic dimensions
of the efficient scatterers and the requirements imposed on the frequency
band being standard for such electrodynamic objects give no way of solving
adequately the analysis and synthesis problems with the help of one isolated
method. It is just this domain of theoretical radio physics that involves complete
resources of both the frequency-domain and time-domain methods along with
the physical results of the resonant wave scattering theory.
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R.I. Belous, Y.G. Makeyev, and A.P. Motornenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
Characteristics of Symmetrical H0ïð Oscillations in a Waveguide-Dielectric
Resonator with a Double-Layer Dielectric Element
Expressions for calculating the eigen frequencies f, the partial
(Q1, Q2, Q3)
and the eigen (Q0) Q-factors of symmetrical H0ïð
oscillations of the resonator based on a below-cutoff waveguide with a double-layer coaxial dielectric element are obtained.
The computations of f and Q are conducted for the H011-oscillation
in the centimeter and millimeter wavelength ranges. The influence of physical and geometrical parameters
of the structure on the resonance frequency and the inherent Q-factor of the waveguide dielectric resonator
is demonstrated.
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Yu.M. Penkin
Kharkov National Pharmaceutical University of Ukraine
47, Pushkinskaya St., Kharkov, 61002, Ukraine
Radiation characteristics of a narrow dielectric-filled slot
on a perfectly conducting sphere
Analitic equations for the radiation field and self-conductance of the narrow
finite dimension dielectric field slot where obtained using the Green functions
for a homogeneous infinite spase outside the perfectly conducting sphere.
Note that the slot field is approximated by the cross-component of the fundamental mode
of the rectangular waveguide with a cross-section which is
equal to the aperture of the slot radiator.
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V.A. Katrich, S.A. Martynenko, and L.P. Yatsuk
V. Karazin National University of Kharkov,
4, Svoboda Sq., Kharkov, 61077, Ukraine
Inclined Slot in the Narrow Wall of Rectangular Waveguide
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A.V. Yevdokimov and V.V. Kryzhanovsky
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
Experimental Investigations into Optocontrolled Elements of a Millimeter-Wave Antenna Array on Surface Waves
The findings of investigations into the reflecting
and absorbing properties of optocontrolled plates
made of high-resistivity monocrystalline silicium featuring
different lifetimes of minority charge carriers and dissimilar
levels of bulk resistance over the 8-mm wave band.
A study has been made of the IR illumination effect upon
the properties of the waveguide system. A variety of
electrodynamic diagrams of optocontrolled antenna
arrays are optimized. A ~ 100% maximum efficiency of transforming
a slow waveguide mode to the radiating one is attained. The spatial and
polarization characteristics of scattered fields have been explored.
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Y.Y. Volkolupov, M.A. Krasnogolovets, O.G. Lebedev, M.A. Ostrizhnoy, and V.I. Chumakov
Kharkov National University of Radio Engineering and Electronics,
14, Lenin Ave, Kharkov, 61166, Ukraine
On the determination of time characteristics of radiating antennas
Pulse characteristics of the broadband antennas that are approximated
by bandpass filter with oscillation frequency characteristics are presented.
The time-domain analysis enables to estimate the nature of radiation of non-sinusoidal signals by a linear antenna.
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A.V. Sulima1 and V.I. Chebotarev2
1A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
2V. Karazin National University of Kharkov, 4, Svoboda Sq., Kharkov, 61077, Ukraine
Input Impedance of a Cavity-Backed Slot Antenna
A new approach to the input impedance calculation of a cavity-backed slot antenna is proposed.
The approach is based on a rigorous solution of a 2D scattering problem and a transmission
line model of the antenna. Comparison of the results of numerical simulation and experimental data has shown the good agreement.
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Yu.M. Penkin and R.I. Klimovitch
National Pharmaceutics University of Kharkov
47, Pushkinskaya St., Kharekov, 61002, Ukraine
Analysis of the Field Radiated by a
Monopole Located on an Impedance Hemispherical Bulge Above a Screen
The Green function technique is used to determine the radiation field from a thin radial monopole.
The monopole is placed on a hemispherical bulge above a screen and is excited near its mounting
point by a delta-impulse generator. The plane infinite screen is assumed to be perfectly conducting,
while the surface of the hemispherical bulge is characterized by a distributed complex-valued impedance.
The radiation characteristics of the structure are analyzed numerically in dependence on its geometric
and electric parameters.
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V.M.Yakovenko and I.V.Yakovenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
On Interaction of Charged Particles Flow with 2D Electron Gas
A theory of interaction of charged particles flow with plasmons existing in two-dimensional
(2D) electron gas is developed. It is supposed that electrons in the flow that crosses a
localization region of 2D gas represents a wave packet the energy width of which is small
as compared with plasmon energy. Therefore their interaction with the plasmon field is described by the
Schrodinger equation. An equation for the change of the plasmon field and the instability
increment are obtained in the paper.
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Yu.O. Averkov and V.M. Yakovenko
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
Nonlinear Spatial Charge Waves in an Electron Beam Moving Through a Semiconductor
The nonlinear oscillations of semiconductor plasma with a low-density electron
beam in a strong longitudinal magnetic field are considered in the context of a
hydrodynamical approach. An electron beam is assumed to be nonrelativistic and monoenergetic.
The case frequency is studied when the electron momentum relaxation frequency in the
semiconductor is much greater than the electron plasma. The numerical analysis of this case
with the help of the methods of the phase plane shows that the electric field distribution in an
electron beam looks like a shock wave.
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V.V. Starostenko
Tavriya National University,
4, Yaltinskaya St., Simpheropol, 95022
Current Characteristics of Heterogeneous
Conducting Microstructures of Integrated Circuits on Exposure to Electromagnetic Fields
In the paper the current density distributions have been
obtained for heterogeneous conducting microstructure elements being included
in an integrated circuit chip on exposure to electromagnetic fields. The influence
of parameters of metallic film heterogeneity on the value of the current flowing in the
metallization has been found out. The dependence of the threshold current density
on the pulse duration has been obtained for microregions of a heterogeneous structure in the metallization.
The influence of adjacent microstructure elements and boundary conditions
on the character of this dependence has been determined.
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S.A. Zuev, V.V. Starostenko, and A.A. Shadrin
Tavriya National University,
Yaltinskaya 4, Simpheropol, 95022
Boundary Estimation
of Ballistic Transport in the GaAs
Devices with Submicron Dimensions
The dominating mechanisms of dissipation in a semiconductor structure based on
GaAs have been considered. Time dependences of the free path velocity for the different
parameters of the material and the results of estimation of the optimal velocity and
the maximal length in which electrons move in the ballistic regime are represented.
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Ye.P. Taran, V.V. Starostenko, and Ye.V. Grigor'ev
Tavriya National University,
Yaltinskaya 4, Simpheropol, 95022
Effect of Heterogeneity Parameters of Conducting Microstructures
of Integrated Circuits on the Wunsch-Bell Curve
On the strength of the numerical model of the pulse electromagnetic
field impact on the microelectronic IC, the impulse-duration dependences
of specific threshold power (the Wunsch-Bell curve) have been obtained
for microregions of heterogeneous conducting film. The influence of geometric
dimensions of heterogeneous microregions on the threshold intensity value
of the pulse electromagnetic field has been revealed.
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V.P. Titar and O.V. Shpachenko
V. Karazin National University of Kharkov,
4, Svoboda Sq., Kharkov, 61077, Ukraine
Ñîîrdinate-Free Holographic Method
for Estimating the Polarization Characteristics of the Reflected Laser Radiation
Using the generalization of the Fedorov and Stokes methods the coordinate-free
holographic method of estimating the polarization characteristics of the reflected
laser radiation forming a multi-aspects polarization hologram which is recorded
with the reference wave set having different polarization states, is proposed.
It is shown, that the designed holographic method allows to determine optical
features both isotropic and anisotropic reflected surfaces of the objects understudy.
On digital simulation and experimental grounds it was shown that for isotropic substances
the method proposed allows to distinguish not only metals, dielectric, and semiconductors but
to categorize metals according to the type of their crystal lattices and Fermi's surface of the conductivity electrons.
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Yu.E. Kamenev and A.A. Filimonova
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
The Vacuum and Solid-State Electronics HCN Laser with Combined Pumping
An HCN laser with HF plus DC or AC pumping has been investigated.
The results obtained support the conclusion that using the pumping in the form
of HF plus low frequency alternating current have good prospects.
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V.A. Kashpur, O.V. Khorunzhaya, A.A. Krasnitskaya, V.Ya. Maleyev, and M.A. Semenov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
EHF Dielectric Permittivity and Structural Changes of Liver DNA of Rats Irradiated in Chernobil Zone
Hydration shell and alterations in the structural state of DNA isolated from the liver of rats irradiated
in the Chernobyl zone have been examined. Complex dielectric permittivity in the millimeter band
was found to change suggesting that DNA exposed to radiation is characterized by the reduced
ability of ordering the structure of water shell as compared to native DNA. The observed decrease
in the degree of DNA hydration is explained by significant radiation-induced changes in its secondary
structure, as judged from the analysis of IR spectra and pronounced DNA disintegration revealed by electrophoresis.
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B.I. Makarenko, V.V. Malakchov, G.I. Doroshenko, and G.A. Chukanova
Kharkov Medical Academy of Post-Graduate Education,
Kharkov, Korchagintsev, 58
Pulse-Modulated Information Wave Therapy in Complex
Treatment of Cerebral Atherosclerosis Patients with Minimal Neurological Deficiency
The group of 118 cerebral atherosclerosis patients with minimal neurological deficiency
has been involved in comparative study of the effect of basic pharmacological therapy
(cavinton, essentiale, nootropil) and complex treatment based on pharmacotherapy
complemented with electromagnetic signal generated via pulse modulation of carrier frequency
(ranging from 1.2 to 1.3 GHz) by periodic sequence of rectangular pulses. The pulse frequency
was changed saw-toothly within the range from 1 to 300 kHz. Power flux density was 10-6 W/cm2.
The results obtained provide evidence for antinociceptive and sedative action of electromagnetic
signal and its ability to improve the variables of cerebral hemodynamics in the group of patients being examined.
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V.V. Starostenko
Tavriya National University,
Yaltinskaya 4, Simpheropol, 95022
The Influence of Powerful Pulse Electromagnetic Fields on Biological Objects and Media
The results of influence of powerful microwaves pulse electromagnetic fields
on water and water solubility of calcium and magnesium carbonate have been represented.
The results of influence of feed based on water activated by a impulse electromagnetic field,
on morphological and reproductive nature of drosophila have been shown and also the results
of immediate influence of impulse electromagnetic fields on San Jose scale have been presented.
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N.V. Dreval, T.Yu. Shchegoleva, V.G. Kolesnikov, A.P. Belozorov, and E.I. Milyutina
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine
12, Academician Proskura St., Kharkov 61085, Ukraine
Application of EHF-Dielectrometry Method in Studying Growth Phases of E.Coli Cells
The EHF-dielectrometry method involving the millimeter wavelength
band has been employed to examine the culture of E.coli cells of different ages. Significant changes
in dielectric permittivity parameters of cell structures of bacteria being grown using some antibiotic have been shown.
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L.O. Aver'yanova
Kharkov National University of Radio Engineering and Electronics,
14, Lenin Ave, Kharkov, 61166, Ukraine
Peculiar Features of Interaction between Physical Fields
and Human Bone Tissue
An overview of the results obtained in studying the interaction between the physical fields
of different origin and human bone tissue is given from the standpoint of their clinical application.
The data presented in the above overview can be utilized in physical and technical studies when
developing therapeutic-diagnostic equipment.
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