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Investigation of electrical properties of photosensitive structures of reduced dimension based on silicon coated with rare earth fluorides 氟化稀土包覆硅基降维光敏结构的电性能研究
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.67-73
N. Poluektova, D. Shishkina, Alexander N. Bazanov, Roman A. Perebalin, I. Shishkin, N. Latukhina, G. Rogozhina
{"title":"Investigation of electrical properties of photosensitive structures of reduced dimension based on silicon coated with rare earth fluorides","authors":"N. Poluektova, D. Shishkina, Alexander N. Bazanov, Roman A. Perebalin, I. Shishkin, N. Latukhina, G. Rogozhina","doi":"10.18469/1810-3189.2022.25.4.67-73","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.67-73","url":null,"abstract":"In this paper, we consider the effect of porous silicon and dysprosium fluoride films on the current-voltage characteristics of low-dimensional photosensitive structures based on silicon. The processes of creating and studying the resulting photosensitive structures are described. The current-voltage characteristics of the structures before and after coating are given. The study found a positive effect of porous silicon and dysprosium fluoride coating on the current-voltage characteristics of structures both with and without porous silicon. Values of the optimal thickness of the dysprosium fluoride coating for porous photosensitive structures are obtained. It is shown that dysprosium fluoride coatings do not always have a positive effect on such parameters of photosensitive structures as short-circuit current and open-circuit voltage, since this is due to the non-uniformity of film deposition on the surface of the structure.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"33 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125001483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Discrete time model of self-oscillations with spectral line widening 谱线加宽自振荡的离散时间模型
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.27-32
V. Zaitsev, A. Karlov, Husamuldin K.-M. Alalvan
{"title":"Discrete time model of self-oscillations with spectral line widening","authors":"V. Zaitsev, A. Karlov, Husamuldin K.-M. Alalvan","doi":"10.18469/1810-3189.2022.25.4.27-32","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.27-32","url":null,"abstract":"An algorithm for generating quasi-harmonic self-oscillations with a uniformly widened spectral line is presented. The algorithm is based on the equation of motion of the Thomson-type DT-oscillator, which introduced a random effect in the form of band-pass white noise. Two types of effects are implemented: additive and parametric. Spectral characteristics of generated self-oscillations were analyzed by numerical experiment. The additive algorithm is shown to generate self-oscillations with amplitude-frequency fluctuations. Frequency fluctuations set the Lorentz (resonant) shape of the central part of the self-oscillation power spectrum, amplitude fluctuations form a noise pedestal of the spectral line. Based on the analysis of statistical characteristics of fluctuations in the frequency of the DT-oscillator with additive noise impact, a parametric algorithm for generating quasi-harmonic self-oscillations is proposed. In it, the resonance frequency of the oscillating system of the Thomson DT-oscillator is subject to random perturbations. The results of numerical experiments with generators of quasi-harmonic oscillations are given.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126440757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral solution for a delay system with hyper-Erlang distributions 具有超erlang分布的延迟系统的谱解
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.33-38
V. Tarasov, N. Bakhareva
{"title":"Spectral solution for a delay system with hyper-Erlang distributions","authors":"V. Tarasov, N. Bakhareva","doi":"10.18469/1810-3189.2022.25.4.33-38","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.33-38","url":null,"abstract":"The article is devoted to the construction of a mathematical model for delaying claims in a queue in the form of a queuing system described by two flows with the laws of distribution of time intervals shifted to the right by hyper-Erlang distributions of the second order. In the queuing theory, the study of systems G/G/1 is relevant because there is no solution in the final form for the general case. Therefore, various partial distribution laws are used as an arbitrary distribution law G in the study of such systems. In this case, the use of the shifted hyper-Erlang distribution law provides the coefficient of variation of the input flow arrival intervals and service time over the entire interval (0, ). To solve the problem, we used the method of spectral solution of the Lindley integral equation, which plays an important role in the queuing theory. This method made it possible to obtain asolution for the average delay of requests in the queue for the considered system in a closed form. As is known, the remaining characteristics of the queuing system are derivatives of the average delay of requests in the queue.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114646746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Approaches to mathematical modeling of coatings that protect against electromagnetic radiation in the soft X-ray range 防止软x射线范围内电磁辐射的涂层的数学建模方法
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.9-26
Yu. G. Belov, V. Biryukov, Vasily A. Malakhov, I. Malakhova, Maria S. Nechaeva, Yuliya V. Raevskaya, Aleksey S. Raevsky, A. Y. Sedakov, Aleksey A. Titarenko
{"title":"Approaches to mathematical modeling of coatings that protect against electromagnetic radiation in the soft X-ray range","authors":"Yu. G. Belov, V. Biryukov, Vasily A. Malakhov, I. Malakhova, Maria S. Nechaeva, Yuliya V. Raevskaya, Aleksey S. Raevsky, A. Y. Sedakov, Aleksey A. Titarenko","doi":"10.18469/1810-3189.2022.25.4.9-26","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.9-26","url":null,"abstract":"The objects of study are composite structures that protect agaist electromagnetic radiation in the soft X-ray range. The purpose of this work is to propose approaches to the mathematical modeling of coatings based on these structures, to calculate the reflection and transmission characteristics of a homogeneous plane wave incident at different angles on such coatings. Research methods - electrodynamic modeling, graph theory, three-dimensional electromagnetic modeling in CAD. Mathematical models of multilayer structures obtained on the basis of the electrodynamic approach and using graph theory, the results of calculations of the reflection and transmission characteristics of a homogeneous plane wave incident at different angles on such structures are presented. The prospects for the use of film coatings with air holes are considered. The results obtained in the course of the work may be used to create coatings that protect electronic equipment from the effects of X-rays.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115657166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Equivalent circuit of an inductor on a nanocrystalline core with a high magnetic permeability 高磁导率纳米晶磁芯上电感器的等效电路
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.100-121
V. F. Dmitrikov, D. V. Shushpanov, Eduard A. Fochenkov
{"title":"Equivalent circuit of an inductor on a nanocrystalline core with a high magnetic permeability","authors":"V. F. Dmitrikov, D. V. Shushpanov, Eduard A. Fochenkov","doi":"10.18469/1810-3189.2022.25.4.100-121","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.100-121","url":null,"abstract":"Based on the measured impedance of the inductors based on a toroidal core wound from a thin (18 m) nanocrystalline tape, with a different number of winding turns, an equivalent high frequency (0 Hz - 500 MHz) circuit model was built. The equivalent circuit model was built taking into account the physical processes occurring in the inductor: effect of wire resistance, effect of core material, mutual effect of wire and core material. The attempt explaining why the frequency characteristics (modulus and phase) of the inductor complex impedance have such a character in a wide frequency band (up to 500 MHz) was made. It was shown that for constructing an equivalent circuit model (structure and parameters), measuring only the inductors resistance modulus is not enough. It is also necessary to measure the phase of the inductor complex resistance, which is ignored in many works on the synthesis of an e inductor equivalent circuit. The fundamental difference between the operation of a nanocrystalline core and a ferrite core as applied to high-frequency filters is shown.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128197904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Analysis of heating of printed circuit board conductors on a metal base for spacecraft devices at pulsed current 航天器用金属基板导体在脉冲电流下的加热分析
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.59-66
A. V. Kostin
{"title":"Analysis of heating of printed circuit board conductors on a metal base for spacecraft devices at pulsed current","authors":"A. V. Kostin","doi":"10.18469/1810-3189.2022.25.4.59-66","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.59-66","url":null,"abstract":"The article presents the results of the analysis of heating of printed circuit conductors of printed circuit boards mounted on a metal base, on-board device of spacecraft when pulsed current flows through them. Thermal transient and impulse characteristics of a system consisting of a printed conductor and a printed circuit board are considered. The analysis of the dependence of the temperature rise rate of printed conductors and the duration of transient processes on the linear dimensions of the system elements is given. It is noted in the article that the time of transient processes most strongly depends on the thickness of the layer of insulating materials. All the results were obtained in the process of modeling transients in the ANSYS 2019 R1 Transient Thermal module. Practical recommendations on the consideration of thermal transients in printed conductors in the design of printed circuit boards are given.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131766905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Increasing of bit error rate performance for OFDM systems over fading channels 衰落信道下OFDM系统误码率性能的提高
Physics of Wave Processes and Radio Systems Pub Date : 2022-12-31 DOI: 10.18469/1810-3189.2022.25.4.39-45
L. Averina, Alexandr Yu. Lafickiy
{"title":"Increasing of bit error rate performance for OFDM systems over fading channels","authors":"L. Averina, Alexandr Yu. Lafickiy","doi":"10.18469/1810-3189.2022.25.4.39-45","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.4.39-45","url":null,"abstract":"A method for increasing performance of OFDM systems in multipath channels is proposed. The proposed method uses Kalman filter based channel estimator with block type pilot structure. Performance of the proposed method has been demonstrated for GSCM/EDGE channel models, typical for urban area and very small cells. The characteristics of the proposed algorithm are compared with other well-known methods. The impact of Doppler spread is considered. A computer simulation has been carried out to evaluate the required signal-to-noise ratio in case of fixed bit error probability. It is shown, that proposed method leads to lower bit error ratio for slow fading case, but its performance degrades with increasing Doppler frequency.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134278514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Equivalent circuit of a dielectric in a wide frequency range (0 Hz – 500 MHz) 宽频率范围(0 Hz - 500 MHz)的电介质等效电路
Physics of Wave Processes and Radio Systems Pub Date : 2022-09-29 DOI: 10.18469/1810-3189.2022.25.3.43-57
V. F. Dmitrikov, D. V. Shushpanov
{"title":"Equivalent circuit of a dielectric in a wide frequency range (0 Hz – 500 MHz)","authors":"V. F. Dmitrikov, D. V. Shushpanov","doi":"10.18469/1810-3189.2022.25.3.43-57","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.3.43-57","url":null,"abstract":"Based on the measured impedance of the dielectrics an equivalent high frequency (0 Hz - 500 MHz) circuit model was built. The equivalent circuit model was built taking into account the physical processes occurring in the dielectric. The attempt explaining why the frequency characteristics (modulus and phase) of the dielectric complex impedance have such a character in a wide frequency band (up to 500 MHz) was made. It was shown that for constructing an equivalent circuit model (structure and parameters), measuring only the dielectrics resistance modulus is not enough. It is also necessary to measure the phase of the dielectric complex resistance, which is ignored in many works on the synthesis of an e dielectric equivalent circuit.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126284026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The calculation of a two-cascade long-period fiber grating of the refractive index 双级联长周期光纤光栅折射率的计算
Physics of Wave Processes and Radio Systems Pub Date : 2022-09-29 DOI: 10.18469/1810-3189.2022.25.3.73-81
R. V. Budaragin, M. I. Kurzenkov, Aleksandr A. Radionov, Zinaida Yu. Salasenko
{"title":"The calculation of a two-cascade long-period fiber grating of the refractive index","authors":"R. V. Budaragin, M. I. Kurzenkov, Aleksandr A. Radionov, Zinaida Yu. Salasenko","doi":"10.18469/1810-3189.2022.25.3.73-81","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.3.73-81","url":null,"abstract":"A method is proposed for calculating the spectral characteristics of cascade long-period fiber gratings of the refractive index of the core based on the method of partial regions and decomposition. According to the method, the structure is represented as a cascade connection of basic inhomogeneities, each of which is a junction of several optical fibers with different dielectric and geometric parameters. Approbation of the method was carried out by reducing the structure to a single long-period fiber grating and comparing the results with the results obtained using other calculation methods. The results matched graphical accuracy. The advantage of the method is the possibility to theoretically study the effect of dielectric and geometric parameters on the spectral properties of the structure, as well as significantly save time resources. The transmission spectra of gratings with different parameters of period T, grating length L, and distance between gratings Lf are presented.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132578060","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral decomposition for a QS based delay model with Erlang and hyperexponential distributions 具有Erlang和超指数分布的QS延迟模型的谱分解
Physics of Wave Processes and Radio Systems Pub Date : 2022-09-29 DOI: 10.18469/1810-3189.2022.25.3.24-28
V. Tarasov
{"title":"Spectral decomposition for a QS based delay model with Erlang and hyperexponential distributions","authors":"V. Tarasov","doi":"10.18469/1810-3189.2022.25.3.24-28","DOIUrl":"https://doi.org/10.18469/1810-3189.2022.25.3.24-28","url":null,"abstract":"This article is devoted to the study and obtaining a closed-form solution for the average delay of claims in a queue for a QS formed by two flows with Erlang and hyperexponential distributions of the second order for time intervals. As is known, the Erlang distribution ensures the coefficient of variation of the arrival intervals is less than one, and the hyperexponential distribution is greater than one. It is also known that the main characteristic of the QS, the average delay, is related to these coefficients of variations by a quadratic dependence. Studies of G/G/1 systems in queuing theory are topical due to the fact that they are used in modeling data transmission systems for teletraffic analysis. To solve the problem, the method of spectral decomposition of the solution of the Lindley integral equation was used. The spectral decomposition for the system under consideration made it possible to obtain a closed-form solution for the average delay of requests in the queue. For the practical application of the results obtained, the method of moments is used.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129767029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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