Ашық рұқсат Ашық рұқсат  Рұқсат жабық Рұқсат берілді  Рұқсат жабық Тек жазылушылар үшін

Том 70, № 3 (2025)

Мұқаба

Бүкіл шығарылым

Ашық рұқсат Ашық рұқсат
Рұқсат жабық Рұқсат берілді
Рұқсат жабық Тек жазылушылар үшін

ОБЗОР

VORTEX ELECTROMAGNETIC WAVES: RADIATION, RECEIVING, PERSPECTIVES OF APPLICATION

Azarov M., Airapetian A., Kaloshin V., Lyalin K., Meleshin Y.

Аннотация

A review of achievements in the field of research of electromagnetic waves with spiral phase front and their applications is presented. Known methods of radiation and receiving of such waves are considered, as well as their application to increase the efficiency of frequency spectrum use in radio communication systems due to simultaneous transmission of signals on several vortex modes with different angular indices, to improve the performance of radar systems with synthetic aperture by obtaining additional information, methods of reducing backscattering of radar objects. The ways of further research are discussed.

Journal of Communications Technology and Electronics. 2025;70(3):187-208
pages 187-208 views
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СТАТИСТИЧЕСКАЯ РАДИОФИЗИКА

A method for calculating errors in measuring the angular coordinates of a radar target presented as a multipoint model

Gavrilov K., Zlobin S., Malashko Y.

Аннотация

The problem of determining errors in measuring angular coordinates (angular noise) of a radar target presented as a multipoint model is considered. A method for calculating errors in the angular coordinates of targets is proposed, which is based on determining the gradient of the phase field of the wave at the point of reception of reflected signals. Analytical relations have been obtained that make it possible to calculate the direction of arrival of waves with an arbitrary number and location of points in a multipoint target model. For various types of targets — low-flying, group and single targets with a different number of points, calculations of errors in the angles of arrival of radio waves were carried out. In this case, angular errors are understood as the deviation of the direction of arrival of reflected radio waves from the direction of the geometric center of the target. The analysis of the causes of abnormal errors in measuring angles for the considered cases of numerical calculations is carried out.

Journal of Communications Technology and Electronics. 2025;70(3):209-221
pages 209-221 views
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ТЕОРИЯ РАДИОТЕХНИЧЕСКИХ ЦЕПЕЙ

Parametric synthesis of matching four-poles in a feedback circuit of multistage amplifiers reflective type

Golovkov A., Golovkov V.

Аннотация

An algorithm has been developed for the parametric synthesis of reflective multistage amplifiers using reactive, resistive, mixed and complex matching four-poles connected to a feedback circuit. The possibilities of syn­thesizing such amplifiers using the reflection coefficient at the input and output of a radio device are con­sidered. The interrelationships between the elements of the classical feedback transmission matrix, optimal according to the selected criterion, are determined. The frequency dependences of the resistances of the two-pole part of the indicated types of four-pole resistances are obtained, which are optimal according to the criterion of en­suring the specified frequency characteristics. Dual permutations have been established that make it possible to determine the input resistances for structural circuits of the “nonlinear part — additional four-pole” type with known expressions for the output resistances of structural circuits of the “additional four-pole — nonlinear part” type and vice versa. In this case, the theory of four-poles, methods of matrix algebra, parametric synthesis of microwave control devices, decomposition and mathematical analysis of the frequency characteristics of ref­lective amplifiers are used.
Journal of Communications Technology and Electronics. 2025;70(3):222-235
pages 222-235 views
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PARAMETRIC SYNTHESIS OF MATCHING FOUR-POLES IN A FEEDBACK CIRCUIT OF MULTISTAGE AMPLIFIERS AND AUTOGENERATORS

Golovkov A., Golovkov V.

Аннотация

An algorithm for parametric synthesis of multistage amplifiers and autogenerators using reactive, resistive, mixed or complex matching four-poles included in a feedback circuit has been developed. The interrelationships between the elements of the classical feedback transmission matrix, optimal according to the selected criteria, are determined. The dependences of the resistances of a part of the two-pole of the indicated types of four-pole on the frequency optimal according to the criterion of providing the specified characteristics are obtained. In this case, the theory of four-poles, methods of matrix algebra, parametric synthesis of microwave control devices, decomposition and circuit analysis of radio devices are used. A comparative analysis of the theoretical results obtained by mathematical modeling in the MathCad system and the experimental results obtained by circuit modeling in the OrCAD and MicroCap systems shows their satisfactory agreement. In particular cases, the results of the work coincide with the known ones.
Journal of Communications Technology and Electronics. 2025;70(3):236-247
pages 236-247 views
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РАДИОФИЗИЧЕСКИЕ ЯВЛЕНИЯ В ТВЕРДОМ ТЕЛЕ И ПЛАЗМЕ

SELF-MODULATING QUASI-REGULAR AND CHAOTIC OSCILLATIONS IN A NONLINEAR SYSTEM OF TWO CONNECTED OSCILLATORS

Ivanov A., Shavrov V., Shcheglov V.

Аннотация

Self-modulating and chaotic oscillations in a system of two coupled oscillators excited by an external periodic force are considered. It is assumed that the first oscillator has cubic nonlinearity and is connected to the second oscillator by a quadratic coupling. Two examples of problems leading to such a model are given: the first task is the task of exciting powerful hypersound in a ferrite plate with magnetically elastic properties; the second is the task of exciting electromagnetic noise vibrations in a ferrite disk placed in an electrodynamic resonator. It is noted that both problems can be reduced to solving a simplified system of two shortened oscillatory type equations, the first of which corresponds to a magnetic oscillator, and the second to an elastic or electrodynamic one. Time-based oscillation scans, parametric portraits for the displacement and its derivative, as well as frequency spectra of excited oscillations in a wide range of excitation amplitude are obtained. Two main oscillation modes have been identified: mode No. 1 — multiharmonic regularized, mode No. 2 — multiharmonic quasi–chaotic, which, starting from regular, alternately replace each other as the level of excitation increases.
Journal of Communications Technology and Electronics. 2025;70(3):248-255
pages 248-255 views
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ЭЛЕКТРОННАЯ И ИОННАЯ ОПТИКА

PARAXIAL APPROXIMATION IN THE REGION OF FORMATION OF ELECTRON BEAM OF PLANAR GYROTRON

Sapronova T., Syrovoy V.

Аннотация

The flow structure and the Laplace field implementing this structure are investigated on models that include various options for specifying the beam axis and the potential on it, taking into account the asymptotics of the antiparaxial theory during emission in the T-mode. The problems of non-uniform distribution of parameters on the cathode surface and the formation of the ends of a ribbon beam with a cross-section deformed due to the drift velocity are discussed.
Journal of Communications Technology and Electronics. 2025;70(3):256-269
pages 256-269 views
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FORMATION OF THE ENDS OF RIBBON ELECTRON BEAMS

Sapronova T., Syrovoy V.

Аннотация

In the paraxial approximation, a solution of the external problem for the end region of cylindrical beams with a contour in the form of a rounded rectangle and parallelogram is constructed for emission in p - and T-modes.
Journal of Communications Technology and Electronics. 2025;70(3):270-273
pages 270-273 views
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NEW ELECTRONIC SYSTEMS AND ELEMENTS

Features of simulation of periodic steady-state in nonlinear networks with memristor devices

Rusakov S., Ulyanov S.

Аннотация

The numerical properties of applying the method to compute the periodic solutions in the analysis of circuits with memristor devices are considered. The modification of the iterative procedure is proposed, which ma­kes it possible to improve numerical properties in simulation of periodic modes by taking into account the cha­racteristics of memristors. Examples of simulation confirming the operability of the developed computational procedure are given.
Journal of Communications Technology and Electronics. 2025;70(3):274-286
pages 274-286 views
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