Physics of Wave Processes and Radio Systems最新文献_第3页

The effect of docking defects on a metal-dielectric shielded waveguide in the EHF frequency range 对接缺陷对EHF频率范围内金属介质屏蔽波导的影响

Physics of Wave Processes and Radio Systems Pub Date : 2023-07-01 DOI: 10.18469/1810-3189.2023.26.2.48-57

V. V. Krutskikh, A. Ushkov, A. Chernikov, Denis O. Zavitaev, Artavazd E. Mirzoyan

{"title":"The effect of docking defects on a metal-dielectric shielded waveguide in the EHF frequency range","authors":"V. V. Krutskikh, A. Ushkov, A. Chernikov, Denis O. Zavitaev, Artavazd E. Mirzoyan","doi":"10.18469/1810-3189.2023.26.2.48-57","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.2.48-57","url":null,"abstract":"Background. To improve the accuracy of navigation and radar systems, functional nodes of the EHF wavelength range are used. At the same time, an increase in the operating frequency increases the requirements for the accuracy of manufacturing and docking devices. Analysis of the propagation of electromagnetic waves, subject to the presence of defects in the waveguide paths, will allow determining sufficient manufacturing accuracy and evaluating physical processes in an irregular area. Aim. The aim of this work was to study the effect of sharp irregularities on the characteristics of the digital twin of a broadband shielded dielectric waveguide operating in the frequency range from 90 to 100 GHz. Methods. Using a numerical experiment, two variants of irregularity were investigated. They are presented in the form of displacement of sections of shielded dielectric waveguides in the vertical and horizontal planes. Results. According to the values of the transfer characteristic of the waveguide path, the regularities of the attenuation of the electromagnetic wave energy from the magnitude of the irregularity are revealed and the permissible manufacturing accuracy is proposed. Conclusion. To solve the problems of sewerage of weak signals, the authors recommend using a non-jointed manufacturing technology.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130848947","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

Development of a mathematical model of a chiral metamaterial based on a cylindrical helical elements accounting for the dispersion and concentration of elements 基于圆柱螺旋元的手性超材料数学模型的建立，考虑了元的分散和浓度

Physics of Wave Processes and Radio Systems Pub Date : 2023-07-01 DOI: 10.18469/1810-3189.2023.26.2.36-47

I. Buchnev, D. S. Klyuev, Yuliya S. Mamoshina, O. Osipov, D. Panin

{"title":"Development of a mathematical model of a chiral metamaterial based on a cylindrical helical elements accounting for the dispersion and concentration of elements","authors":"I. Buchnev, D. S. Klyuev, Yuliya S. Mamoshina, O. Osipov, D. Panin","doi":"10.18469/1810-3189.2023.26.2.36-47","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.2.36-47","url":null,"abstract":"Background. Interest in the study of microwave metamaterials is associated with the possibility of using them to achieve the required frequency and polarization selective properties of interaction with electromagnetic radiation, which can’t be obtained for structures based on homogeneous media. Aim. The mathematical model of a chiral metamaterial based on a periodic matrix of arbitrarily oriented conducting thin-wire cylindrical helices located in a homogeneous isotropic container creation is considered. Unlike known models, it takes into account the explicit form of the dependence of the effective permittivity and the relative chirality parameter on the helices concentration. Methods. The heterogeneity of a chiral metamaterial based on the Maxwell Garnett formula, which makes it possible to determine the effective dielectric permittivity from the permeabilities of the container and the region occupied by conducting mirror asymmetric inclusions is taken into account when creating a mathematical model. The dispersion of permittivity using the quadratic Lorentz formula and the dispersion of the chirality parameter based on the Condon model are taken into account. Results. Analytical frequency-dependent expressions for the effective permittivity and the chirality parameter taking into account the concentration of helices and their geometric parameters, were obtained in the work. The expression for the relationship between the dimensionless volume concentration of inclusions and the distance between adjacent elements is obtained. The quasi-static approach is used to calculate the resonant frequency of conducting thin-wire cylindrical helices. Conclusion. The proposed method for constructing a mathematical model can be applied to chiral metamaterials based on periodic matrices of conductive elements of an arbitrary mirror asymmetric spatial configuration.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116617091","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

Four-wave mixing on thermal and resonant nonlinearities with feedback for object and signal waves 物体和信号波的反馈热非线性和共振非线性的四波混频

Physics of Wave Processes and Radio Systems Pub Date : 2023-07-01 DOI: 10.18469/1810-3189.2023.26.2.18-26

Aleksandr А. Akimov, V. V. Ivakhnik, Kseniya G. Kazakova

{"title":"Four-wave mixing on thermal and resonant nonlinearities with feedback for object and signal waves","authors":"Aleksandr А. Akimov, V. V. Ivakhnik, Kseniya G. Kazakova","doi":"10.18469/1810-3189.2023.26.2.18-26","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.2.18-26","url":null,"abstract":"Background. The need to create highly efficient four-wave radiation converters in order to use them in adaptive optics systems, for real-time processing of complex spatio-temporal fields, in interferometry, quantum cryptography, etc. requires along with the use of traditional methods to increase the efficiency of such converters by increasing the interaction length, radiation power density, effective value of the nonlinear susceptibility of the development of new methods. One of these methods is a method based on the imposition of feedback on one or more interacting waves. Aim. The influence of feedback on the amplitude reflection coefficient of the degenerate four-wave radiation converter on thermal and resonant nonlinearities has been considered. Methods. The amplitude reflection coefficient of a degenerate four-wave radiation converter on thermal and resonant nonlinearities in the presence of feedback for both object and signal waves has been analyzed by a numerical method based on the multiple passage of the signal and object waves of the nonlinear layer in the ring resonator. Results. It was shown, that the difference in the reflection coefficients in the presence and absence of feedback for both object and signal waves increase monotonically with a growth in the pumping waves intensity and does not depend on the parameter characterizing the relationship between thermal and resonant nonlinearities at the approximation of a small reflection coefficient. Conclusion. The range of values of the absorption coefficient in which the imposition of feedback for both object and signal waves leads to an increase in the efficiency of the four-wave radiation converter has been established.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129044645","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

Determination of the effect of noise on the image using software 用软件确定噪声对图像的影响

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.116-122

Danil L. Myasnikov, L. D. Lozhkin, Y. Sokolova

引用次数: 0

Spectral characteristics of the integral operator of the internal problem of electrodynamics for elliptical frame structure 椭圆框架结构电动力学内问题积分算子的谱特征

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.58-69

D. Tabakov, A. Mayorov

{"title":"Spectral characteristics of the integral operator of the internal problem of electrodynamics for elliptical frame structure","authors":"D. Tabakov, A. Mayorov","doi":"10.18469/1810-3189.2023.26.1.58-69","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.1.58-69","url":null,"abstract":"The article is devoted to the analysis of electrodynamic properties elliptical frame structure. Taking into account double symmetry internal problem of electrodynamics for the structure under consideration in the framework of the thin-wire approximation is reduced to four integral Fredholm equations of the first kind, written with respect to independent current functions. A study of spectral characteristics of the integral operators of the corresponding integral equations for various values of the electrical length and ellipticity of the frame. It is shown that the eigenfunctions of integral operators for close values of these parameters have a high degree of correlation, with In this case, the eigenfunctions are close in form to trigonometric functions. Features of the frequency dependence of the eigenvalues integral operators. The conclusion is made about the resonant nature of these dependences, what makes an elliptical frame structure in many respects similar to the previously considered tubular vibrator and spherical spiral particle. The results presented in the article form an in-depth understanding of the processes occurring in the structure under consideration, and also serve as a guideline in the construction of approximation models for solving the internal tasks.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"01 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128797453","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

Investigation of the microwave chiral metamaterial based on a uniform set of C-shaped conductive inclusions 基于均匀c形导电包体的微波手性超材料研究

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.79-92

I. Buchnev, Dmitry S. Kushnir, O. Osipov, M. A. Frolova

{"title":"Investigation of the microwave chiral metamaterial based on a uniform set of C-shaped conductive inclusions","authors":"I. Buchnev, Dmitry S. Kushnir, O. Osipov, M. A. Frolova","doi":"10.18469/1810-3189.2023.26.1.79-92","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.1.79-92","url":null,"abstract":"The paper considers an artificial chiral metamaterial created on a homogeneous container basefrom foamed dielectric, in which flat conducting S-shaped microelements are evenly placed and arbitrarily oriented. To describe the metamaterial, a particular mathematical model was constructed that takes into account chirality, dispersion, and heterogeneity of the structure. The Maxwell Garnett model was used to account for heterogeneity. To take into account the dispersion of the chirality parameter, the Condon model known from the theory of optically active media was used. The partial domain method was used to solve the problem of the incidence of a plane electromagnetic wave of linear polarization on a planar layer created on the base of the investigated chiral metamaterial. The solution of the problem was reduced to an inhomogeneous system of linear algebraic equations for unknown reflection and transmission coefficients, taking into account the cross-polarization of the electromagnetic field. An analysis of the numerical results showed that the structure has pronounced frequency selective properties, in particular, as in the case of chiral metamaterial based on three-dimensional conductive elements, discrete frequencies were determined at which the structure is transparent to microwave radiation. Chiral metamaterial based on C-shaped microelements can be used to create narrow-band frequency-selective microwave energy concentrators of planar type.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126619831","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

High resolution acoustic tomography based on backpropagation of waves 基于波反向传播的高分辨率声层析成像

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.70-78

D. Sukhanov, Anzhela E. Kuzovova

{"title":"High resolution acoustic tomography based on backpropagation of waves","authors":"D. Sukhanov, Anzhela E. Kuzovova","doi":"10.18469/1810-3189.2023.26.1.70-78","DOIUrl":"https://doi.org/10.18469/1810-3189.2023.26.1.70-78","url":null,"abstract":"A method of high-resolution acoustic tomography of scattering inhomogeneities based on the method of reverse time migration is proposed. An inhomogeneous background medium with a known distribution of refractive inhomogeneities is considered, where it is necessary to detect scattering inhomogeneities. Probing is carried out by broadband arbitrary waveforms. The method of reverse time migration is supplemented with linear filtering of the direct propagation field, which makes it possible to increase the resolution of reconstructed images. The results of numerical modeling and experiment are presented. Sounding was carried out in water at frequencies from 20 to 350 kHz using a signal with linear frequency modulation. The source of the ultrasonic signal was fixed and irradiated the objects under study in the water. The scattered signal was measured in a plane near the surface in water on a rectangular area with a step of less than 2 mm. Signal processing by the proposed method made it possible to reconstruct a three-dimensional image of scattering inhomogeneities with a resolution of about 7 mm. Comparison of the proposed method and the reverse time migration method showed that the proposed method allows obtaining a higher resolution.","PeriodicalId":129469,"journal":{"name":"Physics of Wave Processes and Radio Systems","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130657853","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

Comparison of geometric optics and «aperture» methods for calculation of the electromagnetic radiation caused by charged particles flying by dielectric objects 计算电介质物体飞行的带电粒子引起的电磁辐射的几何光学和“孔径”方法的比较

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.49-57

E. S. Belonogaya, D. S. Klyuev

引用次数: 0

Influence of nanoparticle dispersion in a transparent liquid on the spatial characteristics of a four-wave radiation converter 纳米粒子在透明液体中的分散对四波辐射变换器空间特性的影响

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.9-17

V. V. Ivakhnik, Maxim V. Savelyev

引用次数: 0

Linearly polarized field of a flat aperture 平孔径的线偏振场

Physics of Wave Processes and Radio Systems Pub Date : 2023-03-30 DOI: 10.18469/1810-3189.2023.26.1.18-27

S. Skulkin, Nikolai A. Lysenko, G. K. Uskov, Nikolai I. Kashcheev, Ksenia V. Smuseva

引用次数: 0