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Radiophysics and Quantum Electronics最新文献

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An Experimental Study of Two-Dimensional Direction Finding Methods in a Passive Radiotelemetric Complex with an Antenna Array 天线阵列无源无线电遥测复合体二维测向方法的实验研究
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-11 DOI: 10.1007/s11141-025-10404-4
V. Yu. Semenov
{"title":"An Experimental Study of Two-Dimensional Direction Finding Methods in a Passive Radiotelemetric Complex with an Antenna Array","authors":"V. Yu. Semenov","doi":"10.1007/s11141-025-10404-4","DOIUrl":"10.1007/s11141-025-10404-4","url":null,"abstract":"<p>We analyze the results of a full-scale experiment on two-dimensional direction finding (with respect to the azimuth and the elevation angle) in a passive radiotelemetric complex in the decimeter-wave range. The complex includes an adaptive antenna array, whose sheet has rectangular topology. Direction finding objects transmit both a tone signal and a phase-manipulated signal, which is in most demand in modern telemetry complexes. Scenarios with one, two, or three sources on the air are considered. Special attention is paid to cases where two sources are located in the main beam of the directional pattern. The work proposes a number of approaches which allow one to reduce the computational complexity of the processing method. The experimental results confirm their applicability for real-time operation in domestic complexes of this type.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"639 - 648"},"PeriodicalIF":0.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Model of Electrodynamic and Thermal Phenomena in Conducting Nanostructures Under the Influence of Microwave Fields 微波场影响下导电纳米结构的电动力学和热现象模型
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-11 DOI: 10.1007/s11141-025-10400-8
E. V. Grigoriev, V. V. Starostenko, I. Sh. Fitaev, A. S. Mazinov
{"title":"Model of Electrodynamic and Thermal Phenomena in Conducting Nanostructures Under the Influence of Microwave Fields","authors":"E. V. Grigoriev,&nbsp;V. V. Starostenko,&nbsp;I. Sh. Fitaev,&nbsp;A. S. Mazinov","doi":"10.1007/s11141-025-10400-8","DOIUrl":"10.1007/s11141-025-10400-8","url":null,"abstract":"<p>We consider the features of modeling the interaction of electromagnetic waves in the microwave range with nanosized conducting structures, which allow one to theoretically study the dynamics of the development of electrodynamic and thermal phenomena leading to a burn-through of thin films.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"593 - 600"},"PeriodicalIF":0.7,"publicationDate":"2025-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling the Polarization Characteristics of Weather Phenomena with Their Full Polarization Scanning 用全偏振扫描模拟天气现象的偏振特征
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-09 DOI: 10.1007/s11141-025-10398-z
E. L. Shoshin
{"title":"Modeling the Polarization Characteristics of Weather Phenomena with Their Full Polarization Scanning","authors":"E. L. Shoshin","doi":"10.1007/s11141-025-10398-z","DOIUrl":"10.1007/s11141-025-10398-z","url":null,"abstract":"<p>We study the polarization characteristics of weather phenomena. An algorithm for estimating the covariance matrix of scattering of volumetrically distributed meteorological objects using an ensemble of Keno matrices is described. Invariants of the covariance matrix of scattering and Keno pre-matrix are analyzed. An algorithm for full polarization scanning by an unpolarized sequence of radio waves is described. Simulation results of differential reflectivity and linear and circular depolarization ratio of rain, downpour, and hail are presented.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"573 - 580"},"PeriodicalIF":0.7,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Selective Coaxial Launcher of an Oversized Input Cavity of a Gyroklystron 回旋速调管超大输入腔的选择性同轴发射装置
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-09 DOI: 10.1007/s11141-025-10399-y
Yu. Yu. Danilov
{"title":"Selective Coaxial Launcher of an Oversized Input Cavity of a Gyroklystron","authors":"Yu. Yu. Danilov","doi":"10.1007/s11141-025-10399-y","DOIUrl":"10.1007/s11141-025-10399-y","url":null,"abstract":"<p>We study a selective coaxial launder of an oversized cavity operating at the eigenmode of two higher asymmetric, spatially developed coupled modes in the context of the radiation input into a millimeter-wavelength gyroklystron. The external coaxial cavity is coupled with the internal oversized cavity and microwave sources via azimuthally periodic systems of rectangular holes in both side walls. The relation between the parameters of the coaxial launcher, which ensures the maximum transformation of the feeding-waveguide mode into the eigenmode of the internal cavity, has been found. The fundamental mode TE<sub>10</sub> of the rectangular waveguide is transformed into the eigenoscillation of the coupled TE<sub>1221</sub> and TE<sub>641</sub> modes, which rotates azimuthally, with an efficiency of 0.6 in the absence of ohmic losses.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"581 - 592"},"PeriodicalIF":0.7,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theory of Second-Harmonic Generation of a Nonlinear Photoacoustic Response Of Two-Layer Samples With Gas–Microphone Signal Recording 气体传声器信号记录两层样品非线性光声响应的二次谐波产生理论
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-08 DOI: 10.1007/s11141-025-10402-6
T. H. Salikhov, Yu. P. Khodjaev, A. Makhmalatif, D. M. Sharifov
{"title":"Theory of Second-Harmonic Generation of a Nonlinear Photoacoustic Response Of Two-Layer Samples With Gas–Microphone Signal Recording","authors":"T. H. Salikhov,&nbsp;Yu. P. Khodjaev,&nbsp;A. Makhmalatif,&nbsp;D. M. Sharifov","doi":"10.1007/s11141-025-10402-6","DOIUrl":"10.1007/s11141-025-10402-6","url":null,"abstract":"<p>We have formulated a mathematical model for a nonlinear photoacoustic (PA) response of two-layer samples. The features of second-harmonic (SH) generation of a nonlinear PA signal by these samples are studied in detail. Simple expressions for the amplitude of this signal, which describe its dependence on the modulation frequency of the incident beam, as well as on the thermal coefficients of thermophysical parameters and emissivity of the samples, are obtained for the most interesting cases. It was found that only for the case where the first layer is highly absorbing and both layers are thermally thick the frequency dependence of the SH amplitude of the PA signal has the form ω<sup>−5/2</sup> and is described by the function ω<sup>−3/2</sup> in all other cases. Only for nontransparent layers does the thermal coefficient of emissivity of the corresponding layer contribute to the amplitude of this signal.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"614 - 626"},"PeriodicalIF":0.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of a Strong Pump Wave on a Weak Probe Wave in a Resonator Made of Annealed Polycrystalline Copper 退火多晶铜谐振腔中强泵浦波对弱探测波的影响
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-08 DOI: 10.1007/s11141-025-10403-5
V. E. Nazarov, A. B. Kolpakov
{"title":"Influence of a Strong Pump Wave on a Weak Probe Wave in a Resonator Made of Annealed Polycrystalline Copper","authors":"V. E. Nazarov,&nbsp;A. B. Kolpakov","doi":"10.1007/s11141-025-10403-5","DOIUrl":"10.1007/s11141-025-10403-5","url":null,"abstract":"<p>We present the results of experimental and theoretical studies on the effect of a strong pump wave on a weak probe wave in an acoustic rod resonator (with rigid and soft boundaries) made of annealed polycrystalline copper. The measurements were carried out with simultaneous excitation of the resonator in its first and fourth longitudinal modes. An analytical description of nonlinear effects (changes in the amplitude and frequency of resonant oscillations for a weak wave under the influence of a strong one) is developed within the framework of the hysteretic equation of state for a polycrystalline solid with saturation of amplitude-dependent internal friction. By comparing the experimental and analytical amplitude dependences of the nonlinear effects, we determined the parameters of the hysteresis nonlinearity of annealed copper for various combinations of strong and weak wave frequencies corresponding to the first and fourth resonator modes.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"627 - 638"},"PeriodicalIF":0.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Features of Sum-Frequency Generation in the Saturation Regime by Broadband Laser Pulses with Opposite Frequency Chirps 具有相反频率啁啾的宽带激光脉冲在饱和状态下产生和频特性
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-08-08 DOI: 10.1007/s11141-025-10401-7
I. V. Kuzmin, S. Yu. Mironov, M. A. Martyanov, A. K. Poteomkin
{"title":"Features of Sum-Frequency Generation in the Saturation Regime by Broadband Laser Pulses with Opposite Frequency Chirps","authors":"I. V. Kuzmin,&nbsp;S. Yu. Mironov,&nbsp;M. A. Martyanov,&nbsp;A. K. Poteomkin","doi":"10.1007/s11141-025-10401-7","DOIUrl":"10.1007/s11141-025-10401-7","url":null,"abstract":"<p>We examine the features of second-harmonic generation (eo–e and oe–o phase matching) and third-harmonic generation (oo–e phase matching) by laser pulses with opposite frequency chirps in the saturation regime, based on numerical simulations. The influence of the material dispersion of the crystal, spectral phase mismatch, and spatial drift on the conversion efficiency and the preservation of the pulse shape at the sum frequency is investigated.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 8","pages":"601 - 613"},"PeriodicalIF":0.7,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144897013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Resonance Scattering and Absorption of an Extraordinary Plane Wave by a Cylindrical Irregularity in a Magnetoplasma 磁等离子体中圆柱形不规则体对异常平面波的共振散射和吸收
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-07-04 DOI: 10.1007/s11141-025-10394-3
A. V. Ivoninsky, A. V. Kudrin, N. V. Shchapina
{"title":"Resonance Scattering and Absorption of an Extraordinary Plane Wave by a Cylindrical Irregularity in a Magnetoplasma","authors":"A. V. Ivoninsky,&nbsp;A. V. Kudrin,&nbsp;N. V. Shchapina","doi":"10.1007/s11141-025-10394-3","DOIUrl":"10.1007/s11141-025-10394-3","url":null,"abstract":"<p>We study resonance scattering of an extraordinary plane electromagnetic wave by a cylindrical magnetic-field-aligned decreased-density irregularity located in a background magnetoplasma. The emphasis is placed on the influence of smoothing the boundary of such an irregularity on the characteristics of its surface and volume plasmon resonances in comparison with the case of a stepwise plasma density profile. The frequency dependences of the amplitude coefficients of the electromagnetic field and the effective scattering and absorption cross sections (per unit length of the cylindrical irregularity) are obtained for different values of the width of the nonuniform region and its radius. A qualitative change in the behavior of the scattering and absorption cross sections is demonstrated, which is caused by energy dissipation at the upper hybrid resonance of the weakly collisional plasma inside the cylindrical irregularity with a monotonic profile of the plasma density, as compared to the case of a similar sharp-walled irregularity.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 7","pages":"518 - 535"},"PeriodicalIF":0.7,"publicationDate":"2025-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142437","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Characteristics of Electrical Disturbances in a Multidisperse Convective Flow 多分散对流中的电扰动特性
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-07-03 DOI: 10.1007/s11141-025-10392-5
S. S. Davydenko, E. A. Shirokov
{"title":"Characteristics of Electrical Disturbances in a Multidisperse Convective Flow","authors":"S. S. Davydenko,&nbsp;E. A. Shirokov","doi":"10.1007/s11141-025-10392-5","DOIUrl":"10.1007/s11141-025-10392-5","url":null,"abstract":"<p>We present the results of numerical modeling of the interaction of a fraction of heavy charged particles, immersed in a gravitational field and an external uniform electric field, with a weakly conducting charged ascending convective flow within the framework of the approach proposed in (Davydenko et al. in Radiophys. Quantum Electron. 67:423–430, 2024). The features of the instability developing in the system and the characteristics of the emerging small-scale variations of the electric field depending on the parameters of heavy particles are studied. It is shown that the instability growth rate decreases with increasing radius of particles and decreasing absolute value of their charge.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 7","pages":"508 - 512"},"PeriodicalIF":0.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Edge Photogalvanic Effect in a Collisionless Electron Gas: Quantum-Mechanical and Kinetic Descriptions 无碰撞电子气体中的边缘光电效应：量子力学和动力学描述
IF 0.7 4区 地球科学
Radiophysics and Quantum Electronics Pub Date : 2025-07-03 DOI: 10.1007/s11141-025-10397-0
A. A. Bespalov
{"title":"Edge Photogalvanic Effect in a Collisionless Electron Gas: Quantum-Mechanical and Kinetic Descriptions","authors":"A. A. Bespalov","doi":"10.1007/s11141-025-10397-0","DOIUrl":"10.1007/s11141-025-10397-0","url":null,"abstract":"<p>We study the surface photogalvanic effect in a degenerate collisionless electron gas. The surface direct current induced by electromagnetic radiation and flowing along a rigid smooth boundary is calculated for a two-dimensional gas in a semi-infinite quantum well and a three-dimensional gas in a semi-infinite metal slab. The calculations employ two microscopic approaches, namely, the single-particle Schrödinger equation and the Boltzmann kinetic equation. Both approaches yield identical nonzero values of the net surface (edge) current under elliptically polarized radiation. For a linearly polarized wave, the total surface current is zero, marking a key distinction from cases where electron scattering processes are significant. Spatial profiles of the direct current are calculated, revealing that its density decreases as a power law with distance from the edge of the half-plane or semi-infinite slab containing the gas. The exponent varies with the dimensionality of the system and differs between the two approaches. Additionally, the current density exhibits spatial oscillations with a period given by the product of the Fermi velocity and the oscillation period of the radiation field.</p>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"67 7","pages":"558 - 571"},"PeriodicalIF":0.7,"publicationDate":"2025-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","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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