Кафедра мікроелектроніки, електронних приладів та пристроїв (МЕЕПП)

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A High-Power Source of Optical Radiation with Microwave Excitation
(2019) Frolova, T. I.; Churyumov, G. I.; Denisov, O. G.; Wang, N.; Qiu, J.
For more than 50 years, interest to the microwave heating technology has not weakened. In addition to the traditional areas of its application, which described in detail in [1], recently there has been an expansion of technological possibilities for the use of microwave energy associated with the impact of electromagnetic waves of the microwave range on various materials (sintering of metal and ceramic powders) and media, including plasma [2]. One such new direction is the creation of high-power and environmentally friendly sources of optical radiation on the basis of an electrodeless sulfur lamp with microwave excitation [2, 3]. The purpose of this paper is to the further development of the theory and practice of microwave excitation by the electrodeless sulfur lamps, improvement the energy efficiency during energy conversion into the optical radiation and widening the application of new light sources in real practice. The results of the computer modeling of conversion process of the microwave energy into optical radiation energy are presented. The simulation results are compared with experimental data. It is shown that additional use of the solar panels for the reverse conversion of the optical radiation into DC energy with follow-up its using in the circuits of secondary power supply allows improving the energy efficiency of the light source.
A matrix electrodynamics as an analogue of the Heisenberg’s mechanics
(2008) Gritsunov, A. V.
A matrix approach to solving the electrodynamic problems is suggested. The specificity of one is treatment of an electrodynamic system (ES) as an oscillating system with a finite number of the degrees of freedom. The ES is considered as a set of spatially localized so-called partial oscillators (oscillets). Matrices of unit mutual pseudoenergies and unit mutual energies of the oscillators are evaluated. The eigenfrequencies and the eigenfunctions of the ES can be calculated basing on the lumped elements oscillating system matrix theory. A matrix second-order ordinary differential equation is solved for excited potentials of the ES instead of the D’Alembert equation. The main advantage of the matrix electrodynamics is substitution of the solving the partial derivative differential equations by the less computationally intensive linear algebra problems and the ordinary differential equation integration.
A Matrix Electrodynamics: A Similarity to the Heisenberg’s Mechanics?
(2008) Gritsunov, A. V.; Veryovkina, A.
A matrix approach to solving the electrodynamic problems is described. This specificity consists in the treatment of an electrodynamic system (ES) as an oscillating system with a finite number of the degrees of freedom. The ES is considered as a set of spatially localized partial oscillators (oscillets). Matrices of unit mutual pseudoenergies and unit mutual energies of the oscillators are evaluated. The ES eigenvalues, eigenfunctions and excited potentials can be calculated then basing on the lumped element circuit matrix theory. The main advantage of such approach is substitution of the partial derivative differential equations with the linear algebra problems and the ordinary differential equations.
A self-consistent potential formalism in the electrodynamics
(2009) Gritsunov, A. V.
An attempt is made to complete logically the potential formalism in the electromagnetic theory basing on treatment of the Minkowski space-time as an electromagnetic oscillating system with distributed parameters. The Lagrange function and the energy-pulse four-vector density for the system are written using no the electromagnetic field tensor. Some physical consequences of the offered mathematical tool implementation are considered.
Advanced design of re-entrant beam distributed-emission crossed-field tubes
(IEEE, 2000) Frolova, T. I.; Churyumov, G. I.; Gritsunov, A. V.; Terehin, S. N.
The computed and measured results for re-entrant beam, distributed emission, crossed-field tubes are presented. The computer modelling is carried out by a particle-in-cell method (PIC method) in quasi-periodic, single-mode and non-relativistic approximations. The PIC method provides an accurate means to accomplish the computer modelling of classical continuous-wave magnetron generators including the low-voltage magnetron as well as the millimeter wave magnetron. The 3D self-consistent mathematical model of the non-traditional magnetron generator (combined magnetron) is considered.
Analysis of electron-wave interaction in cathode driven crossed-field amplifiers by coupled-mode method
(1998) Frolova, T. I.; Churyumov, G. I.
In present paper the processes of electron-wave interaction in the cathode driven crossed-field amplifiers are studied. These tubes have a higher gain due to the use of the weakly coupled delay lines placed on the anode and negative electrode (cathode). As a result the r.f. signal of same frequency is applied to the input of a cathode delay line (or to the inputs of the anode and cathode delay lines) and after an amplification the signal is coming to the output of the anode delay line (the mode of cathode excitation)
Biological objects parameters meter based on microwave microscope with coaxial resonant sensor
(2010) Гордиенко, Ю. Е.; Бондаренко, И. Н.; Слипченко, Н. И.
The possibilities to use methods and tools of the nearfield microwave microscopy for studying small-dimension biological objects are analyzed. Methods for optimization of the resonant sensor structure with regard to the objects features are developed, the system of the information signals formation is proposed.
Cathodic vacuum arc multilayer coatings (TiZrSiY)N/NbN : structure and properties depending on the deposition interval of alternate layers
(2023) Beresnev, V. M.; Lytovchenko, S. V.; Azarenkov, M. O.; Maksakova, O. V.; Horokh, D. V.; Mazilin, B. O.; Kaynts, D.; Doshchechkina, I. V.; Gluhov, О. V.
Two series of multilayer coatings with different numbers of bilayers (268 and 536, respectively) were synthesised using the cathodic vacuum-arc deposition (CVAD) with the simultaneous sputtering of two different cathodes. The first cathode was made of the multicomponent TiZrSiY material, and the second one was made of technical niobium. The coatings were condensed in a nitrogen atmosphere at a constant negative bias potential applied to the substrate. The resulting coatings have a distinct periodic structure composed of individual layers of (TiZrSiY)N and NbN with the thicknesses determined by the deposition interval (10 or 20 s, respectively). The total thicknesses of the coatings determined by the number of bilayers were 11 and 9 microns, respectively. The formation of polycrystalline TiN and NbN phases with grain size comparable to the size of the layers has been identified for both series of coatings. The layers exhibit a columnar structure growth with a predominant orientation (111). The hardness of the experimental coatings depends on the thickness of the layers and reaches 39.7 GPa for the coating with the smallest layer thickness. The friction coefficient of the obtained coatings varies from 0.512 to 0.498 and also depends on the thickness of the layers. A relatively large value of the friction coefficient is due to high roughness and the presence of a droplet fraction on the surface as well as in the volume of the coatings.
Certificate
(2024) Babychenko, O.
Training certificate for the successful completion of “MENTORS’ SMART UP”course by Sigma Software University
“Chapter 5. Microwave Energy and Light Energy Transformation: Methods, Schemes and Designs”
(InTech, 2018) Frolova, T. I.; Churyumov, G. I.
Nowadays, electrodeless sulfur lamps with microwave excitation (ESLME) are finding ever-widening application in energy-efficiency lighting systems. A reason of increased interest to these lamps is due to high values of their parameters including a high light flux (120-145 klm), a light intensity (~ 9000 cd), a high value of light output (80-110 lm/W), color rendition coefficient (Ra ~ 90), as well as an application of environmentally friendly materials (argon and sulfur). This chapter presents a novel approach of creating an energy-efficiency lighting source on the basis of the ESLME. For an electrodynamic structure of the lighting system, one can propose to use an optically transparent (mesh) waveguide instead of a microwave cavity. It is shown that the use of proximity of the spectra of optical radiation generated by the sulfur lamp and solar radiation allows more efficiently (in comparison with other light sources) their application as the simulators of sunlight for testing photoelectric converters and solar cells. For extending application of the lighting systems on the basis of the sulfur lamp and further increasing an energy efficiency of these systems, their integration with other electron devices (for example, solar cells) is proposed.
Combined Solar Simulator for Testing Photovoltaic Devices
(2019) Frolova, T. I.; Churyumov, G. I.; Vlasyuk, V. M.; Kostylyov, V. P.
The paper discusses a combined solar simulator, consisting of an electrodeless sulfur lamp with microwave excitation and a halogen lamp. It is shown that the emission spectrum of such a design of the combined solar simulator is closest to the spectral distribution of solar radiation in the wavelength range of 400 ... 1100 nm and has an increased service life compared to the solar simulator based on a xenon arc lamp. The spectral irradiance data of the solar simulator based on ASTM E927-10 in the wavelength range of 400 ... 700 nm have been measured. An excellent correspondence has been found between the observed results and existing spectral distribution of sunlight in the visible optical range at the level of AM 1.5G in according to standard ASTM G173-03.
Computer modelling of the electron-wave interaction in combined magnetron
(IEEE, 2000) Frolova, T. I.; Churyumov, G. I.; Sergeev, G. I.
The classical magnetron generators are the most-used among the crossed-field tubes. Having high efficiency, low operating voltages as well as low weight, volume and cost the magnetrons are competitive tubes in the aggregate of the given parameters. Upgrading of requirements to the output parameters of the classical magnetrons as well as complication of their operating modes allowed the researchers to design new types of the magnetrons: coaxial and inverted coaxial magnetrons. These tubes have a different constructional features, but the similar mechanism of an electron-wave interaction. The basis of such a mechanism is the interaction a re-entrant electron beam with an electromagnetic field of the resonant delay line (traditional classical crossed-field systems). On the other hand there are electron-wave systems which feature the interaction of two re-entrant electronic beams with the electromagnetic field of a resonant delay line (non-traditional systems). Among the tubes of this type are the combined magnetron. In this paper the theoretical and experimental investigation results of the physical processes in the combined magnetron are discussed.
Creating of a remote-presence robot based on the development board Texas Instruments to monitor the status of infected patients
(2022) Chekubasheva, V. A.; Kravchuk, O. A.; Hlukhova, H.; Glukhov, O. V.
Statistics show that many infections of employees in medical institutions are associated with direct contact with patients. Furthermore, the deterioration of the patient’s condition in the intervals between doctor’s rounds was observed. Therefore, control and reduction of morbidity through introducing new monitoring methods without the direct involvement of human resources remains an urgent issue. This paper considers an alternative method for monitoring the state of infectious patients undergoing treatment. In this article, we have described the use of standard elements for scanning the medical state of people for the timely detection of pathologies with the implementation of instant notification of the attending physician. Based on the functionality of the Texas Instruments Robotics System Kit (TI-RLSK) developer board and additional sensors, an autonomous robot scanner was created. The considered embodiment of the model systemizes the provided recording recognition of a specific patient with the parameters of the health state in a database. In addition, the navigating system with an updated real-time map of the area enables the robot to deliver medicine to patients.
Creation of a Prototype of a Multi-function Remote Presence Robot for Physical Research in Electronics
(2021) Beresnev, V. M.; Chekubasheva, V. A.; Glukhov, O. V.; Kravchuk, O. O.
The article presents methods for constructing and implementing an automated electronic system for collecting and analyzing information about various physical parameters of the environment under conditions of long-term continuous measurements. The system is based on microprocessor devices using wireless technologies with the implementation of the EKF SLAM algorithm for localizing places with an uneven distribution of environmental parameters to minimize pollution of cleanrooms. Also, it can then transmit signals through the operator's computer to the control elements of the room. Thus, the minimization of environmental factors for physical diseases and high-precision equipment is carried out, thereby extending its service life.
Effective Application of Plasma Lighting Facility Based on Electrodeless Sulfur Lamp for Electrical Regeneration
(45th IEEE International Conference on Plasma Science (ICOPS 2018), 2018) Frolova, T. I.
Today, due to the intensive depletion of fossil resources on Earth, there is a need to use renewable energy sources. The most interesting is the photoelectric conversion of solar energy into electrical energy. Although the Sun is the largest source of energy on Earth and supplies 99.98% of the total energy of our planet, however, the intensity and spectral distribution of its radiation depends on geographical location, climatic, weather, and seasonal conditions, etc. Therefore, in the process of our life, artificial light sources are often used. Modern light sources must satisfy a number of parameters, combining high luminous efficiency and efficiency of generated radiation (a wide range of spectral distribution and color rendering), durability and environmental friendliness with low cost and variety of applications fields.
Electrodeless sulfur lamp on the basis of microwave excitation: estimation of spectral effectiveness of radiation for bio-objects
(Applied Radio Electronics: Sci. Journ, 2018) Frolova, T. I.
The paper considers a lighting system based on an electrodeless sulfur lamp with microwave excitation for bioobjects. As a result of the intensive development of new technologies in the field of lighting equipment (LED, HID lamps, and others) it is necessary to replace outdated lighting for a more energy-efficient one, by using new modern lamps of artificial radiation for biological objects (human, animals and plants). The parameters of optical radiation sources for different biological objects are different (for humans and some animals they are based on the sensitivity of the eye (photonic response curve), for plants – it is the photon flux density of photosynthetically active radiation (PAR) from 400 to 700 nm). High-pressure sodium lamps (HPSL) and metal halide lamps (MHL) are the most common among the artificial light sources used in greenhouses. However, at present, the most effective and promising are lighting systems based on LED lamps and the electrodeless sulfur lamp with microwave excitation. The latter is environmentally friendly (it does not contain mercury), with a high efficiency of PAR (72%) and durable (above 60,000 hrs.) Analysis of the spectral efficiency of radiation showed that the electrodeless sulfur lamp with microwave excitation has a high photosynthetic photon flux density (PPFD) (1440 μmol·s-1·m-2) in an optical range of 400-700 nm.
Electron-Positron Matter Waves as Oscillations of Minkowski Spacetime
(2014) Gritsunov, A. V.
An attempt is made to generalize the basic idea of the self-sufficient potential formalism in electrodynamics (interpretation of electromagnetic phenomena as natural or forced oscillations of the Minkowski spacetime treated as a distributed electromagnetic oscillating system) on the De Broglie waves. Both electrons and positrons are considered as excited modes (oscillations) of a distributed electronpositron oscillating system, not as "hard" particles. Thus, the matter waves are treated as real oscillations of the Minkowski spacetime, not as Born's "probability waves".
Energy states of particles in a quantum sized structure with a complex shaped band diagram
(ХНУРЕ, 2020) Pashchenko, A.; Gritsunov, O.; Babichenko, O.
The subject of research in the article is the energy spectrum of a multilayer quantum sized structure with an energy profile of a complex shape. The goal of this work is to study the interaction of quantum-confined and quasi- continuum energy states of particles under the action of an external stationary electric field applied perpendicular to the planes of quantum confinement. The following tasks were solved in the article: The spectrum of eigenfunctions and eigenvalues of particle energy is determined, both in the area of the quantum confinement and in the area of the quasi-continuum. The definition of the eigenfunctions takes into account the fact that the phase of the eigenfunctions changes due to the motion of particles over the quantum well. The following methods were used to solve the set tasks: quantum mechanical modeling of stationary states in a structure with an energy profile of a complex shape; methods of the theory of small perturbations for describing the interaction of particles in such a structure. The following results were obtained: the basic calculation relations of the mathematical model of the energy states of particles and quasiparticles in quantum-limited and quasi-continuum states were obtained within the framework of the quantum-mechanical approach. The interaction of energy states of particles and quasiparticles in each of the bands between quantum-confined and quasi-continuum states is described depending on the external influence. The theory of small perturbations is applied in the paper to assess the degree of interaction. Conclusions: Analysis of the results of modeling the energy spectrum of a structure with two quantum wells, calculated for an unperturbed state and for the case of external action in the form of a stationary electric field, leads to the following conclusions: in the absence of an external field acting on the considered quantum well structure, electrons and holes located above the separation barrier are characterized by a non-monotonically increasing spectrum of energy states. In this case, the particles are predominantly localized above the quantum wells; the action of a constant external electric field on the structure under consideration leads to the manifestation of the quantum-limited Stark effect both for solitary and for multilayer periodic quantum well structures. In this case, the delocalization of the wave functions and the shift of the corresponding energy levels (the lowest energy levels in the structure under consideration) is expressed as strongly as in multilayer symmetric structures. At the same time, the effect is almost invisible for the higher levels. This is especially pronounced for the energy levels lying above the separation barrier. Thus, it can be expected that an equidistant energy spectrum can be realized at a certain external field strength, which in turn should simplify significantly the attainment of the second harmonic generation mode if the structure under consideration is used in the active region of a semiconductor laser.
Evaluation of Unsteady Non-Harmonic Fields in Microwave Devices. I. Decomposition in the Partial Modes
(2005) Gritsunov, A. V.
Decomposition of electrodynamic line field in so-called partial modes is described. It can be useful for the matched lines, where decomposition in the line eigenmodes is unsuitable because of the continuality of their spectrum. In addition to avoidance of the Fourier integral over a continuum of the normal eigenmodes in matched lines, the partial modes are effective also in simulations of long and irregular lines. Due to the longitudinal localization of the partial modes, the field structure and the electrodynamic parameters of ones depend on the characteristic of a limited longitudinal part of the line. Therefore, only limited number of the partial modes can be taken into account in each transverse section of the line.
Evaluation of Unsteady Non-Harmonic Fields in Microwave Devices. II. Decomposition in the Partial Oscillators
(2005) Gritsunov, A. V.
Decomposition of electrodynamic system field in a set of coupled partial oscillators (oscillets) is described. This is a "large-scale" alternative to the FDTD and FETD methods, as the oscillet "lattice" spacing is determined by physical reasons (upper bound of considered wavenumbers) rather than computational ones. The lattice approximation is adaptable to anisotropic media, because the model of coupled partial oscillators is close to the physical mechanism causing this phenomenon (i.e., the atomic oscillations). The fields in a nonlinear or non-stationary medium also can be expanded in a set of nonlinearly coupled nonlinear or parametric oscillators.