2002, volume 7, ¹ 1
QUASI-OPTICS OF MILLIMETER AND SUB-MILLIMETER WAVE RANGES IN IRE NASU, KHARKOV: FROM IDEAS TO APPLICATION SYSTEM
A. Kostenko, A. Nosich
9-35
Basic stages of initiation and development of research into quasi-optics in IRE NASU are reviewed. The results of many years of work of the team of department of quasi-optics are published for first time. They have been conducted in line with some of the most important USSR programs in science and technology. The review covers timeliness, scientific impact, technical, specificity, and the working conditions in the time of this development. It starts from the discussions on basic ideas and end up with application of developed methods, devices and system in today physical experiment and instrument making. The paper is based on IRE archives, technical reports on research projects done in the quasi-optics department, publications and interviews of team members.
THE MODE-MATCHING TECHNIQUE AS THE BACKGROUND FOR GENERALIZED SOLUTION OF THE INTERNAL BOUNDARY‑VALUE PROBLEMS (OUTLINE)
A. Kirilenko, D. Kulik, V. Tkachenko
36-44
A new generalized mode-matching (GMM) approach to both mode bases and S-matrices calculation of complicated waveguide circuits is to present. Development of the GMM procedures makes it possible to realize totally automatic algorithms for a wide set of configurations avoiding a specialized analytical treatment of each new boundary-value problem. Moreover, the background for linking up the interface tools of a circuit geometry specification and editing is provided by the GMM approach together with the special algorithms for recognizing the object configurations and for data preparation. The class of objects that can be calculated by the suggested approach includes any WG circuits with metal boundaries specified in the Cartesian coordinate system or with the smooth boundaries that may be replaced by a staircase surface. The corresponding electromagnetic solvers are closer to the software based on the mesh methods in generality, in the same time saving the high accuracy and computation speed typical for highly specialized mode-matching procedures.
POLARIZATION PROPERTIES OF A SCREENED CHIRAL LAYER WITH A DIFFRACTION GRATING
S. B. Panin, A. Ye. Poyedinchuk
45-55
The present paper considers polarization characteristics of the reflecting structure like a chiral layer combined with a dielectric layer, both in between a diffraction grating and a screen. Due to the analytical regularization procedure, the correspondent diffraction vector problem is solved in the form available for effective numerical treatment. It is shown that an incident plane-polarized field can be totally converted into the regularly reflected cross-polarized field. The character of the polarization conversion is influenced by the grating and by the resonance properties of the grating-screen volume. The laws of the polarization conversion have been established as well as the possibilities for the enhancement of the structure efficiency and broadbandness.
MODELING OF RADAR CLUTTER SIGNAL WITH NONGAUSS DISTRIBUTION
G. P. Kulemin, E. A. Goroshko, A. A. Kyrekin
56-67
The algorithm of clutter formation with nongaussian probability density of the signal instantaneous values is analyzed. It is shown that the satisfactory results are obtained for method of nonlinear transformations with preliminary correction of the power spectrum. The results of simulation for clutter with a composite normal distribution are presented.
ELECTROMAGNETIC DISPLAY OF GEODYNAMIC OBJECTS OF EARTH CRUST
Yu. A. Bogdanov, V. I. Voronin, A. M. Chernyakov, V. N. Uvarov
68-76
The link between geologic structure of entrails and impulse electromagnetic radiation on a daylight surface of the Earth is explored. The conclusion about higher selfdescriptiveness of electromagnetic radiation from comparison of transmittances of the boundary rock sphere - atmosphere for acoustic and electromagnetic oscillations is made.The mechanism of origin of acoustic-electromagnetic radiation of entrails at a friable - plastic deformation of soil as a result of a relaxation of mechanical tensions of tectonic genesis is proposed. The existence of an inconvertible correlation of local pulsed electromagnetic radiation on a daylight surface with a fissile depth fault allows to explain usage of this mechanism. The conclusion about existence of invisible extending up to a daylight surface tracks of the buried fault from comparison of a reference length of a radiate propagation with seismical depth damping of these structures is made.
A STUDY OF BICONICAL HORN ANTENNA
A. L. Teplyuk, G. I. Khlopov
77-81
The features of development of a biconical horn antenna with omnidirectional power pattern in E-plane and axial coax to waveguide transition is considered. The comparison of various types of transitions was done, the calculation of power pattern in vertical plane developed and showed that such antenna has amplitude and phase distribution with separable variables, when the horn radius is essentially more than wavelength. Experimentally measured characteristics of radiation pattern are in good agreement with the calculation results.
MEASUREMENT OF THE IONOSPHERE PARAMETERS BY MEANS OF CORRELATION PROCESSING OF THE INCOHERENT SCATTER SIGNAL
V. N. Lysenko
82-88
A new method of the correction of the correlation functions of the incoherent scatter signal is presented. It is shown that this method provides the measurement of electron concentration, ionic and electronic temperatures in the broad band of heights at exploration of the ionosphere with 1 ms pulse signals.
NONLINEAR SPATIAL CHARGE WAVES IN AN ELECTRON BEAM MOVING THROUGH A SEMICONDUCTOR
Averkov Yu. O., Yakovenko V. M.
89-94
The nonlinear oscillations of a semiconductor plasma with a low-density electron beam in the strong longitudinal magnetic field are considered within the framework of hydrodynamic approach. An electron beam is assumed to be nonrelativistic and monoenergetic. The case when the electron plasma frequency is much less then the electron relaxation frequency in semiconductor is investigated. 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 with a sharp leading edge.
ON INTERACTION OF CHARGED PARTICLES FLOW WITH TWO-DIMENSIONAL GAS
V. M. Yakovenko, I. V. Yakovenko
95-99
A theory of interaction of charged flow with plasmons existing in two-dimensional (2D) electron gas is constructed. 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 plasmom field is described by the Schrodinger equation. In the present work an equation is obtained characterizing the change of the plasmon field and the instability increment is found.
NONLINEAR DYNAMICS OF PHONON STIMULATED SHF EMISSION DUE TO THE SELF-ORGANIZATION OF SPIN-PHONON MOTIONS IN THE NONAUTONOMOUS PHASER
D. N. Makovetskii
100-109
A new kind of nonlinear low-frequency resonances (
-resonances) leading to self-organization in the nonautonomous ruby
phaser is experimentally revealed and theoretically interpreted on the basis of
the Tang-Statz-deMars model of stimulated emission. The typical -resonance manifests itself by manifold narrowing of the phonon SHF
spectrum and by regular, unusually slow (with period more than 100 s),
highly correlated pulsations of the SHF modes of phonon stimulated emission.
The analytical estimations of the -resonance frequencies demonstrate satisfactory agreement with
experimental ones for small detunings of magnetic field from the inversion line
center. For the case of large detunings a role of magnetic nuclear subsystem
(formed by the Al27 nuclei of the ruby crystal matrix) as possible
inertial component of self-organized dissipative phaser system is discussed.
THE OPTIMIZED MICROWAVE PLASMATRON WITH NONEQUILIBRIUM PLASMA
S. P. Martynyuk, A. P. Motornenko, K. Schünemann, I. G. Skuratovskiy
110-114
The conditions of the maximal input of power in a microwave plasmatron with a flow of strongly nonequilibrium stationary plasma are investigated at atmospheric pressure of gas (argon). The waveguide-coaxial design of a microwave plasmatron with two movable plungers is used. The efficiency of absorption of microwave power (10 GHz CW) in a torch of plasmatron at excitation power up to 12W is higher than 99%.
HIGH FREQUENCY PROPERTIES OF CO/CU MULTILAYER STRUCTURES IN MILLIMETER WAVELENGTHS BAND
V. N. Derkach, S. V. Nedukh, A. G. Ravlik, I. G. Shipkova, S. T. Roschenko, S. I. Tarapov
115-118
The results of property investigations (ferromagnetic resonance response and the non-resonance one) thin magnetic Co/Cu multilayers at the frequency bands 20-80 GHz and 140 GHz are presented in the paper. It is shown that the magnetization saturation of the structure under study depends on the Cu-interlayers thickness. The high-frequency magnetoimpedance behavior in the structures under study near the small external magnetic field values was analysed. It is shown that the module of high-frequency impedance has weak dependence on the frequency for millimeter wavelength band.
THE MAGNETOSTATICS SYSTEM TO DIRECTION THE ELECTRON BEAM
Afanas’ev V. I.
119-122
The small mirror creates for simultaneously deflection end focalizes of the electronic beam with help inhomogeneous of the magnetic field. The lens is made of the two samarium-cobalt disk and paraboliñ of the pole point of the magnetically soft material. She has magnetic induction of the axial component 180 mT on the surface pole point.
EMPIRIC METHOD FOR DETERMINATION OF ELECTRON BEAM STATIC CROSS-SECION PULSATIONS AMPLITUDE IN DRG
E. V. Belousov, V. N. Zheltov, A. I. Tsvyk
123-126
The empiric method for determination of amplitude of static pulsation of electron beam (EB) that has been made in DRG and in other electron microwave devices has been proposed. The formulas for high accuracy calculation of amplitude of thickness static pulsation of ribbon EB for diode electron gun has been obtained by means of this method. The theory results satisfactory agree with experimental ones.
A SMALL-VOLUME PACKETIZED DRO WITH ISOCHRONIC DIFFRACTION GRATING
V. K. Korneenkov, B. K. Skrynnik
127-132
There is presented a small-volume packetized diffraction radiation oscillator (DRO) intended for the long-wave end of the millimeter range (f = 35,5¸39 GHz). The diffraction grating DRO uses is an isochronic double one with the period continuously decreasing by 5% over the length of the electron flow intensive deceleration. On wavelength l = 8,5 mm and at accelerating voltage U ³ 4 kV and focussing magnetic field B = 0,4 T, the output power in continuous mode is as high as Pout = 96 W with efficiency h = 0,12. Using a small-volume open resonator for the DRO oscillation circuit makes it possible to extend the half the power range of electronic frequency tuning to D0,5Pout » 80 MHz; the spectral bandwidth is ~40 kHz under accelerating voltage fluctuations within D = 0,05 V at U = 4 kV.
A HYPERHIGH-FREQUENCY LASER INSTALLATION FOR BIOMEDICAL RESEARCH
V. K. Kiseliov, E. M. Kuleshov, V. P. Radionov, N. F. Dachov, M. S. Yanovsky, V. I. Makolinetz, O. P. Timoshenco, B. N. Shevtzov, T. N. Grashchenkova
133-136
A submillimetre HCN discharge laser for biomedical investigations in clinical conditions is described. This laser is handy, simple and foolproof. The gas discharge excitation is realised with the original electrodes placed outside the waveguide type guasi-optical resonator. It is pumped by alternating current freguency 50 Hz. The laser radiation parameters at wavelength of 337 mkm are presented. The results of medical research are presented.
BROADBAND ECHO-BOX OF MILLIMETER WAVE BAND FOR LONG-LIVED DELAY OF PULSING MICROWAVE SIGNAL
E. M. Ganapolskii
137-141
A small-sized device intended for long-lived keeping of an energy of a millimeter wave band pulsing microwave signal is described. The principle of activity of the device is based on the use of a quasioptical spherical cavity resonator, inside which the ruby ball is located unsymmetrical. The presence of the ball in the cavity results to a removal of degeneration and formation of a dense spectrum of eigen-frequencies. Due to the high quality factor of the resonator the device has ability of long-term keeping of a microwave signal energy. For a short pulsing signal, breadth of which spectrum exceeds the distance between the next lines of a dense spectrum of resonator, the device has a wide effective transmission band. Parameters of the device: central frequency is 36 GHz, duration of signal keeping is not less than 5 ms at potential 100 dB, transmission band is 2 GHz, device volume is 50 cm3, weight is 300 g. The device can be used in a system for automatic calibration and check of potential of receiving - transmitting equipment intended for measuring of the characteristics of microwaves propagation in various mediums.
CONSTRUCTION OF NON REDUNDANT APERTURES OVER A HEXAGONAL GRID BY THE METHOD OF RANDOM SEARCH
Yu. V. Kornienko
142-153
A computer experiment was performed to construct non-redundant configurations with the maximal possible number of elements k on the square grid. Some results are obtained for the squares of dimension n from 5 to 20 grid nodes on the side. Dependence of k, on n is shown on fig. 2, and the configurations obtained are displayed on fig. 3 – 9. A conclusion is drawn that in some cases a random search can provide better results than the known regular methods.
MEASUREMENT OF COMPLEX PERMITTIVITY OF AQUEOUS SOLUTIONS ON HIGH-FREQUENCY BAND
A. V. Vichkan, P. A. Melyanovsky
154-157
Impedance method measurements of permittivity and absorption loss of aqueous solution of salt on high-frequency band is considered. Complex permittivity solutivus of different densities are measured. Use of method for measurement of dielectric parameters of good conductive aqueous media are demonstrated.
INFLUENCE OF POWERFUL PULSING FIELDS TO SOME BIOLOGICAL OBJECTS AND MEDIUMS
V. V. Starostenko
158-161
The results of action of powerful pulsing electrîmagnetic fields of a microwave - gamut on water, on a miscibility in water of calcium carbon and magnesium are given. The results of influence of a forage on water, labilized by a pulsing electrîmagnetic field, on morphological and of the reproduction performance of drosopfila and also results of immediate action of pulsing electrîmagnetic fields on aspidiotus californiens are given.