Radiophysics and Quantum Electronics最新文献_第4页

Influence of Temperature Inversions on Zenith Attenuation of Microwave Radiation in the Atmosphere 逆温对大气中微波辐射天顶衰减的影响

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-13 DOI: 10.1007/s11141-026-10480-0

S. B. Rozanov, A. S. Zavgorodniy, V. L. Voronov

{"title":"Influence of Temperature Inversions on Zenith Attenuation of Microwave Radiation in the Atmosphere","authors":"S. B. Rozanov, A. S. Zavgorodniy, V. L. Voronov","doi":"10.1007/s11141-026-10480-0","DOIUrl":"10.1007/s11141-026-10480-0","url":null,"abstract":"We show that atmospheric zenith attenuation measured by a water vapor radiometer at 20.7 GHz at the Russian Metrological Institute of Technical Physics and Radio Engineering (VNIIFTRI, Mendeleyevo, Moscow Oblast) can significantly exceed (by up to 0.15 dB) values calculated from the Liebe model with temperature profiles smoothly and monotonically decreasing with altitude. These events of excess attenuation are related to elevated inversions in the observed temperature profiles obtained by averaging radiosonde data from the city of Dolgoprudny (22 km from VNIIFTRI). Greater attenuation differences corresponded to more intense inversions. On days and nights when the difference between measured and calculated attenuations at a frequency of 20.7 GHz was small, the average radiosonde temperature profiles monotonically decreased starting from ground level and differed little from the model profiles. Correcting the model temperature profile by adding temperatures measured by radiosondes at altitudes of 0.5–4.0 km eliminated most of the excess in measured attenuation over calculated values. The significant difference in attenuation values at a frequency of 20.7 GHz arose primarily in the cold months with an average occurrence rate of about 20% during both daytime and nighttime. This is consistent with long-term observations of temperature inversions in Dolgoprudny.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"68 8","pages":"578 - 591"},"PeriodicalIF":0.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695574","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

On Modeling Plasma Channels with a Single-Wire Transmission Line 用单线传输线模拟等离子体通道

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-13 DOI: 10.1007/s11141-026-10481-z

N. A. Bogatov, D. V. Yanin

引用次数: 0

Coupled Harmonics as a Characteristic of the Nonlinearity of the Wind Wave Field In Remote Sensing Signals 耦合谐波作为遥感信号中风波场非线性的特征

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-13 DOI: 10.1007/s11141-026-10482-y

A. V. Ermoshkin, A. S. Dosayev, D. D. Razumov, K. A. Tsvetkov, M. B. Salin

{"title":"Coupled Harmonics as a Characteristic of the Nonlinearity of the Wind Wave Field In Remote Sensing Signals","authors":"A. V. Ermoshkin, A. S. Dosayev, D. D. Razumov, K. A. Tsvetkov, M. B. Salin","doi":"10.1007/s11141-026-10482-y","DOIUrl":"10.1007/s11141-026-10482-y","url":null,"abstract":"We discuss the features of wind wave manifestation in remote sensing signals and the possibilities of estimating the wave field nonlinearity parameters based on the analysis of coupled harmonics. Using numerical modeling of one-dimensional nonlinear waves and backscattered signals at a wavelength of 3 cm at sliding sounding angles, we demonstrate the possibility of reconstructing the orbital velocity field of model waves from remote sensing signals. Spectral analysis of sea wave radar sounding signals under natural conditions demonstrated the distribution of the wave energy by coupled harmonics. The angular dependence of the energy distribution over wind wave harmonics, which is observed in the experiment, is confirmed by previously obtained theoretical calculations. Based on the processing results, it was found that the ratio of the spectral densities of the second harmonic to those of the first is greater than that for the Stokes wave and weakly depends on some statistical parameters of the wave measured by contact means. A conclusion is made about the need to take into account coupled harmonics when reconstructing the wave field structure from remote sensing data.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"68 8","pages":"603 - 616"},"PeriodicalIF":0.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695576","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

Instabilities in Meteorid Tails in the Earth’s Atmosphere Associated with the Magnetic Field 地球大气中与磁场相关的流星体尾巴的不稳定性

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-13 DOI: 10.1007/s11141-026-10479-7

T. I. Morozova, S. I. Popel

{"title":"Instabilities in Meteorid Tails in the Earth’s Atmosphere Associated with the Magnetic Field","authors":"T. I. Morozova, S. I. Popel","doi":"10.1007/s11141-026-10479-7","DOIUrl":"10.1007/s11141-026-10479-7","url":null,"abstract":"We study various wave oscillations that can occur in plasma–dust systems of meteoroid tails. In particular, taking into account the inhomogeneity of the plasma density of meteoroid tails and the presence of the Earth’s magnetic field, the excitation of lower-hybrid drift waves, as well as the development of modulation instability of these oscillations, are possible. The appearance of electrophonic sounds simultaneously with the passage of meteoroids can be caused by the development of lower-hybrid drift turbulence in meteoroid tails. Conditions under which lower-hybrid drift waves can propagate in the plasma of meteorid tails as meteorids pass in the Earth’s ionosphere, as well as the development of the modulation instability of these waves in various frequency ranges, are considered. The corresponding growth rates of the modulation instability of a monochromatic pump wave are derived. The values of the growth rates of this instability for typical parameters of the plasma of meteoroid tails are calculated. It is shown that in the considered system of meteoroid tails in the Earth’s atmosphere the development of the Drummond–Rosenbluth instability and the occurrence of anomalous resistance are possible under certain configurations of the Earth’s magnetic field relative to the plasma of meteorid tails. It is shown that the considered processes have time to develop over typical lifetimes of meteoroid tails.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"68 8","pages":"561 - 577"},"PeriodicalIF":0.8,"publicationDate":"2026-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695575","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

On the Energy, Propagation Velocity, and Duration of the Signal Precursor in a Dispersive Medium (Within the Framework of the Method of Moments) 色散介质中信号前体的能量、传播速度和持续时间（矩量法框架下）

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-11 DOI: 10.1007/s11141-026-10486-8

N. S. Bukhman

引用次数: 0

Electrodynamic Analysis of Cylindrical Focusing Devices Made of a Photonic Crystal Formed by Dielectric Cylinders 由介电圆柱形成的光子晶体制成的圆柱形聚焦装置的电动力学分析

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-11 DOI: 10.1007/s11141-026-10484-w

A. M. Lerer, I. V. Donets, S. M. Tsvetkovskaya, M. Danelyan

引用次数: 0

Experimental Study of a Four-Cascade Gyrotwistron Operating in Maximum Efficiency Mode 工作在最高效率模式下的四级旋流管实验研究

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-07-11 DOI: 10.1007/s11141-026-10483-x

E. V. Zasypkin

{"title":"Experimental Study of a Four-Cascade Gyrotwistron Operating in Maximum Efficiency Mode","authors":"E. V. Zasypkin","doi":"10.1007/s11141-026-10483-x","DOIUrl":"10.1007/s11141-026-10483-x","url":null,"abstract":"We propose, basing on the results of earlier works, to minimize the length of the drift section between the last intermediate cavity and the output section under the simultaneous condition of the absence of coupling between them, in order to expand the gain band of a multi-stage gyrotwystron in the region of high electron beam currents, which is most important for powerful gyro-resonance devices. The predicted possibility was confirmed in the process of studying experimentally a fourstage gyrotwystron operating in the maximum efficiency regime, i.e., with the length of the third drift section significantly shorter than the lengths of the first and second drift sections. In a gyrotwystron with the operating TE01 mode at a frequency of 9.25 GHz, the accelerating voltage U0 = 16 kV, and the electron beam current I0 = 3. A, a gain bandwidth of 1.8% at half the output radiation power level with an efficiency of 28% and a gain of 26 dB was achieved. The measured values of the bandwidth and efficiency significantly exceed the values (1% and 21%, respectively) achieved at a beam current of 3.0 A in a three-stage gyrotwystron operated in the maximum gain regime, i.e., with the length of the first drift section approximately equal to the length of the second drift section.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"68 8","pages":"617 - 624"},"PeriodicalIF":0.8,"publicationDate":"2026-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148695213","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

Asymptotic Integrability of Nonlinear Wave Equations 非线性波动方程的渐近可积性

IF 0.7 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-04-27 DOI: 10.1007/s11141-026-10471-1

A. M. Kamchatnov

引用次数: 0

Experimental Study of the Minimum Polynomial Method for Signal Source Direction Finding Under the Interference Conditions 干扰条件下信号源测向的最小多项式方法实验研究

IF 0.7 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-04-27 DOI: 10.1007/s11141-026-10478-8

V. Yu. Semenov, A. G. Flaksman

引用次数: 0

Photochemistry of the Atmosphere: Multistability, Nonlinear Oscillations, and Waves (Review) 大气的光化学：多稳定性、非线性振荡和波（综述）

IF 0.7 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2026-04-27 DOI: 10.1007/s11141-026-10464-0

M. Yu. Kulikov, M. V. Belikovich, A. G. Chubarov, S. O. Dementyeva, A. M. Feigin

{"title":"Photochemistry of the Atmosphere: Multistability, Nonlinear Oscillations, and Waves (Review)","authors":"M. Yu. Kulikov, M. V. Belikovich, A. G. Chubarov, S. O. Dementyeva, A. M. Feigin","doi":"10.1007/s11141-026-10464-0","DOIUrl":"10.1007/s11141-026-10464-0","url":null,"abstract":"We present a brief analysis of the results obtained by studying all known atmospheric photochemical systems with nontrivial nonlinear dynamical properties. In particular, it is demonstrated that multistability and self-oscillations can exist in the photochemical system of the atmospheric boundary layer and lead to a high sensitivity of the concentration of near-surface ozone to emissions of pollutants. Nontrivial properties discovered in the chemistry of the polar lower stratosphere play a key role in the stratosphere dynamics. These properties apparently led to the formation of the Antarctic ozone hole in the mid-1980s. It is shown that in the mesopause region (altitudes of 80–90 km), a nonlinear response of the mesospheric photochemistry to diurnal variations of the solar illumination is possible with the appearance of subharmonic or chaotic oscillations of concentrations of the trace species. Furthermore, formation of nonlinear waves of the reactiondiffusion type can be caused by the influence of the transport processes (in particular, turbulent diffusion), which is a new phenomenon for the Earth’s atmosphere.","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":"68 5-6","pages":"339 - 355"},"PeriodicalIF":0.7,"publicationDate":"2026-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147865778","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