Radiophysics and Quantum Electronics最新文献_第9页

Creation of a HF and VHF Radio Communication Channel Through an Artificial Ionospheric Repeater 通过人工电离层中继器建立高频和甚高频无线电通信信道

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-09-11 DOI: 10.1007/s11141-023-10258-8

V. P. Uryadov, F. I. Vybornov

{"title":"Creation of a HF and VHF Radio Communication Channel Through an Artificial Ionospheric Repeater","authors":"V. P. Uryadov, F. I. Vybornov","doi":"10.1007/s11141-023-10258-8","DOIUrl":"10.1007/s11141-023-10258-8","url":null,"abstract":"<div><div><p>We study experimentally the possibility of creating a HF and VHF radio communication channel at frequencies above the hop-by-hop MUF through an artificial ionospheric repeater, which is formed by as scatterers in the form of magnetic field-aligned small-scale artificial ionospheric irregularities, created at the altitudes of reflection of a high-power O-mode pump wave. The experiments were carried out on the Dymer (Kyiv region)—Sura—Kachalinskaya (Volgograd region) path in the HF sounding regime at fixed frequencies and in the chirp sounding regime on the IZMIRAN—Sura—Rostov-on-Don path. On the Novocherkassk (Rostov region)—Sura— Kachalinskaya path, the measurements were carried out at a frequency of 45.8 MHz. Comparison with simulation results is performed. To ensure stable HF and VHF radio communication through an artificial ionospheric repeater, it is necessary to take into account the state of the ionosphere, the frequency of the communication signal, and the height of the location of scattering irregularities. To adapt communication systems to the current ionospheric environment under conditions of insufficient accuracy in predicting the state of the ionosphere, it is necessary to monitor the ionospheric channel using technical tools for broadband oblique HF and VHF sounding.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"7183905","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

Plasma-Chemical Facility for Synthesis of Micro- and Nanoparticles Having Controlled Compositions and Structures on the Basis of a Microwave Discharge in the Gyrotron Radiation 利用回旋管辐射的微波放电合成成分和结构可控的微纳米粒子的等离子体化学装置

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-09-11 DOI: 10.1007/s11141-023-10261-z

A. S. Sokolov, N. S. Akhmadullina, V. D. Borzosekov, E. V. Voronova, T. É. Gayanova, N. G. Gusein-zade, Z. A. Zakletskii, A. K. Kozak, D. V. Malakhov, N. N. Skvortsova, V. D. Stepakhin, E. A. Obraztsova, O. N. Shishilov

引用次数: 0

Measurements of the Atmospheric Electric Current Density by a Passive Horizontal Ring Antenna in the Surface Layer: Quasi-Stationary Approximation 用无源水平环形天线测量大气电流密度:准平稳近似

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-09-11 DOI: 10.1007/s11141-023-10259-7

S. V. Anisimov, S. V. Galichenko, A. A. Prokhorchuk, K. V. Aphinogenov, E. V. Klimanova

{"title":"Measurements of the Atmospheric Electric Current Density by a Passive Horizontal Ring Antenna in the Surface Layer: Quasi-Stationary Approximation","authors":"S. V. Anisimov, S. V. Galichenko, A. A. Prokhorchuk, K. V. Aphinogenov, E. V. Klimanova","doi":"10.1007/s11141-023-10259-7","DOIUrl":"10.1007/s11141-023-10259-7","url":null,"abstract":"<div><div><p>We consider a quasi-stationary approximation for turbulent electrical processes in the atmospheric boundary layer and their recording by a passive horizontal ring antenna acting as a collector of atmospheric electric current. On the basis of large eddy simulation, variations in electrical variables are calculated and spatial correlation functions and the spectral density of fluctuations of the atmospheric-current density components are estimated along with the response of the collector current to local turbulent perturbations of the conduction-current density and an instantaneous change in the global potential difference between the ionosphere and the Earth’s surface. Based on the simulation results, we estimate the ratio of the total vertical atmospheric electric current density and the conduction current density at the height of the antenna location, which can be used to extrapolate the results of ground-based measurements beyond the atmospheric boundary layer. The results of direct observations of the atmospheric electric current density by the collector are compared with the results of synchronous observations of the atmospheric electric field and the electrical conductivity in the surface layer. The frequency spectra of the collector-measured and calculated fluctuations of electric current have a power-law decay with increasing frequency with indices that are consistent for measurements and model calculations in the range from −1.0 to −1.5.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"7183906","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

Mechanically Machined Microwave Multi-Layer Antireflective Coating of a Dielectric 电介质的机械加工微波多层抗反射涂层

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-09-08 DOI: 10.1007/s11141-023-10263-x

A. V. Ryabov, D. I. Sobolev, M. Yu. Shmelev

引用次数: 0

Estimation of the Variance of a Random Signal with an Unknown Frequency Bandwidth 未知频宽随机信号方差的估计

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-09-08 DOI: 10.1007/s11141-023-10262-y

Yu. E. Korchagin, M. M. Turbin, K. D. Titov

引用次数: 0

Propagation of Pulsed Electromagnetic Signals with the Axisymmetric Field Structure in a Nonlinear Nondispersive Medium 轴对称场结构脉冲电磁信号在非线性非色散介质中的传播

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-07-15 DOI: 10.1007/s11141-023-10256-w

A. V. Kudrin, E. Yu. Petrov

引用次数: 0

Deceleration and Self-Compression of a Wave Pulse in a Discrete Medium 离散介质中波脉冲的减速与自压缩

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-07-15 DOI: 10.1007/s11141-023-10257-9

A. G. Litvak, V. A. Mironov, L. A. Smirnov, A. O. Sofonov

{"title":"Deceleration and Self-Compression of a Wave Pulse in a Discrete Medium","authors":"A. G. Litvak, V. A. Mironov, L. A. Smirnov, A. O. Sofonov","doi":"10.1007/s11141-023-10257-9","DOIUrl":"10.1007/s11141-023-10257-9","url":null,"abstract":"<div><div><p>We consider the features of the dynamics of the wave-packet self-action within the framework of a model described by the one-dimensional discrete nonlinear Schrödinger equation with allowance for the effects of acoustic relaxation of the nonlinear response of the medium. Such models are actively used to describe the energy transfer along protein molecules. Analytical and numerical studies show that the dynamics of the wave packets with energies exceeding the critical values significantly differs from the field evolution in a continuous medium. The behavior of initially smooth (on the scale of the distance between the structural elements of the medium) and initially localized field distributions propagating at subsonic speed is studied in detail. A specific self-action regime, which is not characteristic of the continuous limit, is shown to exist where the wave packet, during its propagation, slows down to a complete stop while undergoing self-compression to the size of the lattice period. Radiation losses increase significantly at the final stage of this process and eventually lead to the formation of a soliton-like structure, which usually moves in the opposite direction (with respect to the initial one). In the case of wave packets with supersonic initial speed, the self-action dynamics develops in a similar way. However, in this case, the motion of the quasisoliton which carries most of the energy becomes subsonic during the backward propagation. As applied to the molecular chains, the considered effects lead to a noticeable increase in the localized action of the compressed excitation on individual structural elements of the discrete medium.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4612846","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

Measurements of the Atmospheric Electric Current Density by a Passive Horizontal Ring Antenna in the Surface Layer: Electrostatic Approximation 用无源水平环形天线在表层测量大气电流密度:静电近似

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-07-15 DOI: 10.1007/s11141-023-10253-z

S. V. Anisimov, S. V. Galichenko, A. A. Prokhorchuk, K. V. Aphinogenov

{"title":"Measurements of the Atmospheric Electric Current Density by a Passive Horizontal Ring Antenna in the Surface Layer: Electrostatic Approximation","authors":"S. V. Anisimov, S. V. Galichenko, A. A. Prokhorchuk, K. V. Aphinogenov","doi":"10.1007/s11141-023-10253-z","DOIUrl":"10.1007/s11141-023-10253-z","url":null,"abstract":"<div><div><p>We study analytically and numerically the relationships for a passive horizontal ring antenna, which is used as a collector for long-term observatory measurements of the atmospheric electric current density. The spatial distributions of the potential and the electric field as functions of the geometric characteristics of the antenna, which is located in a uniform atmospheric electric field, are determined in the electrostatic approximation and the parameters of the atmosphericion motion in the neighborhood of the antenna are calculated. The effective collecting area of the antenna is determined by two different methods. The time of deposition of the atmospheric ions with a given mobility on the collector as a function of the impact parameter and the initial height, which is determined by this parameter, is established. The results of direct measurements of the atmospheric electric current density by a collector are compared with the results of synchronous observations of the atmospheric electric field and the electrical conductivity in the surface layer.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4614938","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: 2

On the Possibility of Advancement of the Non-Stationary Gas Spectroscopy Method Realized by Using Fast Frequency Sweep Mode Up the Terahertz Frequency Range 在太赫兹频率范围内采用快速扫频模式实现非平稳气体光谱方法的可能性

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-07-14 DOI: 10.1007/s11141-023-10255-x

V. L. Vaks, V. A. Anfertev, M. B. Chernyaeva, E. G. Domracheva, S. I. Pripolzin, A. N. Baranov, R. Teissier, A. A. Ayzenshtadt, K. A. Gavrilova

{"title":"On the Possibility of Advancement of the Non-Stationary Gas Spectroscopy Method Realized by Using Fast Frequency Sweep Mode Up the Terahertz Frequency Range","authors":"V. L. Vaks, V. A. Anfertev, M. B. Chernyaeva, E. G. Domracheva, S. I. Pripolzin, A. N. Baranov, R. Teissier, A. A. Ayzenshtadt, K. A. Gavrilova","doi":"10.1007/s11141-023-10255-x","DOIUrl":"10.1007/s11141-023-10255-x","url":null,"abstract":"<div><div><p>Fast frequency sweep mode is a promising method for spectrum recording in a sufficiently wide frequency range within a short time (about a few milliseconds). This approach permits one to detect all substances which have intense absorption lines lying in the frequency range of the spectrometer and which are in a gas mixture when the spectrum is recorded. A spectroscopic system consisting of spectrometers for the centimeter and two-millimeter wavelength ranges operating in fast frequency sweep mode is presented. The possibility of creating a radiation source with fast frequency sweep based on a quantum cascade laser of the terahertz frequency range is explored. The results of numerical simulation for such a source based on experimental characteristics of the studied quantum cascade laser are given. The possibility of using these spectrometers to examine the composition of a mixture of vapors and thermal decomposition products of the tissues of ENT organs is shown.</p></div></div>","PeriodicalId":748,"journal":{"name":"Radiophysics and Quantum Electronics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-07-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"4577574","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

Potentialities of Small-Size Subterahertz-Wave Spectrometers Based on Cascade Frequency Multiplication for Local Environmental Monitoring of the Atmosphere 基于级联倍频的小型亚太赫兹波谱仪用于局部大气环境监测的潜力

IF 0.8 4区地球科学

Radiophysics and Quantum Electronics Pub Date : 2023-07-14 DOI: 10.1007/s11141-023-10254-y

Yu. V. Kistenev, A. Cuisset, F. Hindl, G. K. Raspopin, V. L. Vaks, E. G. Domracheva, M. B. Chernyaeva, A. I. Karapuzikov

引用次数: 1