Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792701
M. Anishin, L. P. Radio, O. A. Lavrentyev
The results of oblique sounding (OS) are presented for the 2,770 km-long longitudinal radio path. Estimates have been obtained for the fast and slow fluctuations of the maximal observable frequency (MOF) and for the day-to-day variation of MOF.Special attention has been given to assessing the effectiveness of error reduction of the maximal usable frequency (MUF) on-line forecast which can be reached for the International Reference Ionosphere (IRI) model-based forecast by correcting the model using current VS data at the center of the path.
{"title":"Research of the MOF Variation at the Mid-latitude Path of Oblique Sounding","authors":"M. Anishin, L. P. Radio, O. A. Lavrentyev","doi":"10.1109/RSEMW.2019.8792701","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792701","url":null,"abstract":"The results of oblique sounding (OS) are presented for the 2,770 km-long longitudinal radio path. Estimates have been obtained for the fast and slow fluctuations of the maximal observable frequency (MOF) and for the day-to-day variation of MOF.Special attention has been given to assessing the effectiveness of error reduction of the maximal usable frequency (MUF) on-line forecast which can be reached for the International Reference Ionosphere (IRI) model-based forecast by correcting the model using current VS data at the center of the path.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132235509","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792734
I. Ivanov, G. Kuleshov
The paper presents the results of observation of the effects of refocusing on the line Moscow – Rostov, demonstrates the implementation of refocusing of the regular type in the ionospheric propagation of radio waves, not associated with the influence of traveling disturbance in the ionosphere. The possibility of nontrivial interpretation of mechanisms of ionospheric propagation of HF radio waves at reception of signals of exact time is analyzed.
{"title":"The Interpretation of the Effects Return Focus in the Ionosphere on the Line Moscow – Rostov","authors":"I. Ivanov, G. Kuleshov","doi":"10.1109/RSEMW.2019.8792734","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792734","url":null,"abstract":"The paper presents the results of observation of the effects of refocusing on the line Moscow – Rostov, demonstrates the implementation of refocusing of the regular type in the ionospheric propagation of radio waves, not associated with the influence of traveling disturbance in the ionosphere. The possibility of nontrivial interpretation of mechanisms of ionospheric propagation of HF radio waves at reception of signals of exact time is analyzed.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127119257","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792720
I. Semernik, A. V. Dem’yanenko
This article is devoted to the task of designing a radiating microwave module for a device for diagnosing bronchopulmonary diseases, based on the method of radiofrequency scanning of the chest. The main tasks of the radiating module are forming a probing microwave signal with specified parameters — frequency and power, minimizing side spectral components. However, in order to provide radio frequency scanning and further interpret the measurement results, the radiating module must be precisely positioned on the chest surface. A structural diagram of the radiating module, its practical implementation, as well as integration with the radiating antenna applicator and two versions of the positioning system are presented.
{"title":"Radiating Microwave Module for Bronchopulmonary Diseases Diagnostic Device","authors":"I. Semernik, A. V. Dem’yanenko","doi":"10.1109/RSEMW.2019.8792720","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792720","url":null,"abstract":"This article is devoted to the task of designing a radiating microwave module for a device for diagnosing bronchopulmonary diseases, based on the method of radiofrequency scanning of the chest. The main tasks of the radiating module are forming a probing microwave signal with specified parameters — frequency and power, minimizing side spectral components. However, in order to provide radio frequency scanning and further interpret the measurement results, the radiating module must be precisely positioned on the chest surface. A structural diagram of the radiating module, its practical implementation, as well as integration with the radiating antenna applicator and two versions of the positioning system are presented.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127308026","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792747
Y. A. Litinskaya, S. V. Polenga, A. V. Stankovsky, A. D. Hudonogova, Y. Salomatov
A subarray for Ku-band wide-angle scanning antenna array based on waveguide continuous transverse stubs (CTS) is presented. The proposed antenna array consists of 2 subarrays, subarray consists of 16 horn radiators. The subarray based on waveguide continuous transverse stubs is fed by a waveguide binary power divider. The CTS subarray for scanning antenna array was calculated and researched. The developed subarray has compact structure, light weight, manufacturability and high efficiency. A beam-scanning range of ± 90° is achieved by mechanically rotating subarrays around its axes at the same angles. The calculated aperture efficiency exceeds 55% in the entire working frequency band. The proposed scanning antenna array with high efficiency can be used for satellite communication terminals and radar systems.
{"title":"A Subarray for Ku-Band High-Gain Scanning Antenna Based on CTS Waveguide","authors":"Y. A. Litinskaya, S. V. Polenga, A. V. Stankovsky, A. D. Hudonogova, Y. Salomatov","doi":"10.1109/RSEMW.2019.8792747","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792747","url":null,"abstract":"A subarray for Ku-band wide-angle scanning antenna array based on waveguide continuous transverse stubs (CTS) is presented. The proposed antenna array consists of 2 subarrays, subarray consists of 16 horn radiators. The subarray based on waveguide continuous transverse stubs is fed by a waveguide binary power divider. The CTS subarray for scanning antenna array was calculated and researched. The developed subarray has compact structure, light weight, manufacturability and high efficiency. A beam-scanning range of ± 90° is achieved by mechanically rotating subarrays around its axes at the same angles. The calculated aperture efficiency exceeds 55% in the entire working frequency band. The proposed scanning antenna array with high efficiency can be used for satellite communication terminals and radar systems.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121369728","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792715
E. Sidorenko, E. Privalov, A. Demchenko, Y. Kabirov, E. Chebanova, I. Nathan
In the frequency range 3.2-12 GHz the absorption of microwave energy was measured by new composite materials, which are xLSMO/yGeO2/(1-x-y)NaF (LiF) glass ceramics, where x, y are the mass fractions of the composite components, x =0.7-0.95 , y=0.05-0.20. Conductivity measurements were performed, structural and microstructural features of materials were studied. It has been found that concentrations of germanium oxide and fluorides significantly affect the degree of absorption of microwave energy by samples. Absorption spectra close to linear ones at levels from 0-3 dB to 12-14 dB were obtained in the whole investigated frequency range for various materials. Some increase in the absorption (5-10%) of energy by these composite materials under the influence of a weak (H≈300 kOe) constant magnetic field was revealed. The spectra of the integral radiation of the electric field were measured with the composites with the lowest conductivity. Prospective areas of work have been outlined for obtaining broadband radio-absorbing composite materials.
{"title":"Radio-Absorbing Composite Materials Based on La0.7Sr0.3MnO3","authors":"E. Sidorenko, E. Privalov, A. Demchenko, Y. Kabirov, E. Chebanova, I. Nathan","doi":"10.1109/RSEMW.2019.8792715","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792715","url":null,"abstract":"In the frequency range 3.2-12 GHz the absorption of microwave energy was measured by new composite materials, which are xLSMO/yGeO2/(1-x-y)NaF (LiF) glass ceramics, where x, y are the mass fractions of the composite components, x =0.7-0.95 , y=0.05-0.20. Conductivity measurements were performed, structural and microstructural features of materials were studied. It has been found that concentrations of germanium oxide and fluorides significantly affect the degree of absorption of microwave energy by samples. Absorption spectra close to linear ones at levels from 0-3 dB to 12-14 dB were obtained in the whole investigated frequency range for various materials. Some increase in the absorption (5-10%) of energy by these composite materials under the influence of a weak (H≈300 kOe) constant magnetic field was revealed. The spectra of the integral radiation of the electric field were measured with the composites with the lowest conductivity. Prospective areas of work have been outlined for obtaining broadband radio-absorbing composite materials.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115321297","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792729
G. Glebova, O. Maltseva
Some publications have shown that, despite the limitation of the orbits of the navigation satellites used to determine the total electron content TEC, in terms of latitude, the usage of TEC in high latitudes has great prospects. In this sense, it is of interest to test models of the ionosphere, which provide a long-term prediction, and short-term forecast methods, based on the history of TEC measurements by one receiver. In this work, according to the reference mid-latitude station Juliusruh and high-latitude station Longyearbyen for 2015, the models IRI-Plas and NeQuick are tested using global maps of JPL, UPC, and a version of the short-term prediction method a day ahead is proposed. It is shown that the IRI-Plas model provides a better fit with the experimental data than the NeQuick model. The possibility of developing a short-term prediction method that at high latitudes gives results not worse than the forecast for middle latitudes is confirmed.
{"title":"Comparison of TEC Prediction Methods for High Latitudes with GIM Maps","authors":"G. Glebova, O. Maltseva","doi":"10.1109/RSEMW.2019.8792729","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792729","url":null,"abstract":"Some publications have shown that, despite the limitation of the orbits of the navigation satellites used to determine the total electron content TEC, in terms of latitude, the usage of TEC in high latitudes has great prospects. In this sense, it is of interest to test models of the ionosphere, which provide a long-term prediction, and short-term forecast methods, based on the history of TEC measurements by one receiver. In this work, according to the reference mid-latitude station Juliusruh and high-latitude station Longyearbyen for 2015, the models IRI-Plas and NeQuick are tested using global maps of JPL, UPC, and a version of the short-term prediction method a day ahead is proposed. It is shown that the IRI-Plas model provides a better fit with the experimental data than the NeQuick model. The possibility of developing a short-term prediction method that at high latitudes gives results not worse than the forecast for middle latitudes is confirmed.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115982547","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792711
V. V. Demshevsky, M. Migalin, Maksim V. Papenyshev, M. S. Levashov
A phased study of the characteristics of the printed antipodal Vivaldi antenna models based on a substrate integrated waveguide in the frequency band 18-42 GHz was carried out. It was found that both the dimensions of the aperture and the exciting segment significantly affect the gain of the antennas as well as their matching in the frequency band. Antenna models were analyzed in CST Microwave Studio. Matching characteristics and radiation patterns are presented.
{"title":"UWB Antenna Vivaldi Based on Substrate Integrated Waveguide","authors":"V. V. Demshevsky, M. Migalin, Maksim V. Papenyshev, M. S. Levashov","doi":"10.1109/RSEMW.2019.8792711","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792711","url":null,"abstract":"A phased study of the characteristics of the printed antipodal Vivaldi antenna models based on a substrate integrated waveguide in the frequency band 18-42 GHz was carried out. It was found that both the dimensions of the aperture and the exciting segment significantly affect the gain of the antennas as well as their matching in the frequency band. Antenna models were analyzed in CST Microwave Studio. Matching characteristics and radiation patterns are presented.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116022139","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792707
I. L. Syrenko, I. Donets, Y. A. Reyzenkind, V. Shevchenko
The problem of one-position determination of coordinates and velocity vector of radio-emitting objects by testing the hypothesis of Doppler frequency shifts reflected by random objects with a priori unknown shape, size, scattering properties and spatial coordinates is solved. The results of numerical simulation are presented.
{"title":"Method of Single-Position Determination of Coordinates And Velocity Vector of Radio-Emitting Objects","authors":"I. L. Syrenko, I. Donets, Y. A. Reyzenkind, V. Shevchenko","doi":"10.1109/RSEMW.2019.8792707","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792707","url":null,"abstract":"The problem of one-position determination of coordinates and velocity vector of radio-emitting objects by testing the hypothesis of Doppler frequency shifts reflected by random objects with a priori unknown shape, size, scattering properties and spatial coordinates is solved. The results of numerical simulation are presented.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"32 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116414550","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792731
A. Pilipenko
The generalized model of hybrid frequency synthesizers (frequency synthesis system) is presented in this paper. This model is intended for wireless communication networks of UHF, L and S bands, including mobile networks of the fourth-generation (4G). A technique of testing of numerical simulation methods for frequency synthesizers in the time domain is proposed. This technique of testing is based on the research of computational errors for quality parameters of transient processes and allows realizing a comparative analysis of numerical simulation methods for frequency synthesizers. Numerical simulation of frequency synthesizers was made in Matlab-Simulink package with use of various numerical methods for solving ordinary differential equations. The obtained results allow choosing the most accurate method of numerical simulation and ensuring the reliability of the simulation results for hybrid frequency synthesizers with various parameters, both in linear and nonlinear modes.
{"title":"Testing of Numerical Simulation Methods for Hybrid Frequency Synthesizers","authors":"A. Pilipenko","doi":"10.1109/RSEMW.2019.8792731","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792731","url":null,"abstract":"The generalized model of hybrid frequency synthesizers (frequency synthesis system) is presented in this paper. This model is intended for wireless communication networks of UHF, L and S bands, including mobile networks of the fourth-generation (4G). A technique of testing of numerical simulation methods for frequency synthesizers in the time domain is proposed. This technique of testing is based on the research of computational errors for quality parameters of transient processes and allows realizing a comparative analysis of numerical simulation methods for frequency synthesizers. Numerical simulation of frequency synthesizers was made in Matlab-Simulink package with use of various numerical methods for solving ordinary differential equations. The obtained results allow choosing the most accurate method of numerical simulation and ensuring the reliability of the simulation results for hybrid frequency synthesizers with various parameters, both in linear and nonlinear modes.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131005003","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}
Pub Date : 2019-06-01DOI: 10.1109/RSEMW.2019.8792737
I. Ivanov, V. Garbatsevich, A. V. Tertyshnikov
This paper discuss the improvement, proposed by a number of authors, of the performance in the low – frequency part of the sounding range, which is essential for the developed ionosondes with a decrease in the lower frequency of sounding. The ways to compensate for the decrease in the energy potential of the decameter sounding channel in satellite monitoring of the ionosphere from high-apogee orbits by increasing the efficiency of short-wave antennas of satellite ionosondes are considered.
{"title":"Shortwave Antenna for Ionospheric Satellites","authors":"I. Ivanov, V. Garbatsevich, A. V. Tertyshnikov","doi":"10.1109/RSEMW.2019.8792737","DOIUrl":"https://doi.org/10.1109/RSEMW.2019.8792737","url":null,"abstract":"This paper discuss the improvement, proposed by a number of authors, of the performance in the low – frequency part of the sounding range, which is essential for the developed ionosondes with a decrease in the lower frequency of sounding. The ways to compensate for the decrease in the energy potential of the decameter sounding channel in satellite monitoring of the ionosphere from high-apogee orbits by increasing the efficiency of short-wave antennas of satellite ionosondes are considered.","PeriodicalId":158616,"journal":{"name":"2019 Radiation and Scattering of Electromagnetic Waves (RSEMW)","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121492283","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}
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