Pub Date : 2010-11-11DOI: 10.1109/CRMICO.2010.5632864
D. Khalameyda, G. Khlopov, S. Khomenko
The present paper concerns the Influence of turbulent troposphere fluctuations on angle of radio waves' arrival measurement accuracy by means of a radiointerferometer for evaluation of troposphere refraction properties Characteristics of the radiointerferometer have been obtained by means of statistic simulation method.
{"title":"Influence of turbulent troposphere fluctuations on the radiointerferometer operation","authors":"D. Khalameyda, G. Khlopov, S. Khomenko","doi":"10.1109/CRMICO.2010.5632864","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632864","url":null,"abstract":"The present paper concerns the Influence of turbulent troposphere fluctuations on angle of radio waves' arrival measurement accuracy by means of a radiointerferometer for evaluation of troposphere refraction properties Characteristics of the radiointerferometer have been obtained by means of statistic simulation method.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122053126","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632695
S. Ilcev
A communication satellite in Medium and High Altitude Orbits must be visible from the regions concerned during the period when it is desired to provide a links for Fixed (FSS) and Mobile Satellite Service (MSS), what can vary from a few to 24 hours per day. These kinds of orbits are circular and are in function to cover a given geographical region at the same local time each day and to offer continuous service to all Mobile (MES), Fixed (FES) and Land Earth Stations (LES). The duration of uninterrupted communication service, which such satellite can provide in any region on the terrestrial surface, is a function of his altitude and latitude of the satellite FSS or MSS receivers or transceivers. The most popular and used type of the Medium and High Altitude Orbits today is well known Geostationary Earth Orbit (GEO) for both FSS and MSS applications with coverage between 75° N and S latitude. The GEO constellation cannot provide coverage for both Polar Regions. On the other hand, Highly Inclined Medium Earth Orbit (MEO) today is mostly in use for Global Navigation Satellite Systems (GNSS), such as first generation of GNSS-1, both military systems, the US GPS and Russian GLONASS. This orbit is also suitable for the European second generation GNSS-2 civilian Galileo system. The Geosynchronous Inclined Orbit (GIO) can be also successfully implemented for GNSS and satellite communication purposes, but is not suitable for covering Polar Regions.
{"title":"Medium and high altitude orbits","authors":"S. Ilcev","doi":"10.1109/CRMICO.2010.5632695","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632695","url":null,"abstract":"A communication satellite in Medium and High Altitude Orbits must be visible from the regions concerned during the period when it is desired to provide a links for Fixed (FSS) and Mobile Satellite Service (MSS), what can vary from a few to 24 hours per day. These kinds of orbits are circular and are in function to cover a given geographical region at the same local time each day and to offer continuous service to all Mobile (MES), Fixed (FES) and Land Earth Stations (LES). The duration of uninterrupted communication service, which such satellite can provide in any region on the terrestrial surface, is a function of his altitude and latitude of the satellite FSS or MSS receivers or transceivers. The most popular and used type of the Medium and High Altitude Orbits today is well known Geostationary Earth Orbit (GEO) for both FSS and MSS applications with coverage between 75° N and S latitude. The GEO constellation cannot provide coverage for both Polar Regions. On the other hand, Highly Inclined Medium Earth Orbit (MEO) today is mostly in use for Global Navigation Satellite Systems (GNSS), such as first generation of GNSS-1, both military systems, the US GPS and Russian GLONASS. This orbit is also suitable for the European second generation GNSS-2 civilian Galileo system. The Geosynchronous Inclined Orbit (GIO) can be also successfully implemented for GNSS and satellite communication purposes, but is not suitable for covering Polar Regions.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121439707","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632623
M. Glyavin, M. Moiseyev, A. Sedov, V. Zapevalov, N. Zavolsky
The paper presents an overview of research activity for development of relatively low-power (10-100 W) submillimeter CW gyrotrons at the IAP RAS The design of CW IAP RAS gyrotrons on the second harmonic of gyrofrequency in the range 0.2-0.8 THz is discussed in this paper. The choosing of the operating mode was made basing on the one hand at the density of the parasitic mode spectrum, especially on the fundamental harmonic and on the other hand on possibility of formation of the electron beam in a magnetron injection gun. Optimization of the cavity profile for these gyrotrons was made and the maximum efficiency for reasonable accelerating voltage from 5 kV to 20 kV and current of the electron beam up to 1 A was determined. The main results of these calculations are presented in table 1. Also for these gyrotrons the influence of parasitic modes at the fundamental and second harmonics of the cyclotron frequency was investigated. One of these devices -0.26 THz gyrotron was developed, manufactured and tested at IAP RAS. The maximum CW output power of 200 W for accelerating voltage 16 kV and beam current 0.3 A was obtained at the experimental tests. During more than 8 hours CW operation tests at the customer's site (BRMZ of Frankfurt University) the frequency and power stability of 5*10-6 and 1 % respectively was demonstrated.
{"title":"Theoretical and experimental investigations of submillimeter CW gyrotrons in IAP RAS","authors":"M. Glyavin, M. Moiseyev, A. Sedov, V. Zapevalov, N. Zavolsky","doi":"10.1109/CRMICO.2010.5632623","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632623","url":null,"abstract":"The paper presents an overview of research activity for development of relatively low-power (10-100 W) submillimeter CW gyrotrons at the IAP RAS The design of CW IAP RAS gyrotrons on the second harmonic of gyrofrequency in the range 0.2-0.8 THz is discussed in this paper. The choosing of the operating mode was made basing on the one hand at the density of the parasitic mode spectrum, especially on the fundamental harmonic and on the other hand on possibility of formation of the electron beam in a magnetron injection gun. Optimization of the cavity profile for these gyrotrons was made and the maximum efficiency for reasonable accelerating voltage from 5 kV to 20 kV and current of the electron beam up to 1 A was determined. The main results of these calculations are presented in table 1. Also for these gyrotrons the influence of parasitic modes at the fundamental and second harmonics of the cyclotron frequency was investigated. One of these devices -0.26 THz gyrotron was developed, manufactured and tested at IAP RAS. The maximum CW output power of 200 W for accelerating voltage 16 kV and beam current 0.3 A was obtained at the experimental tests. During more than 8 hours CW operation tests at the customer's site (BRMZ of Frankfurt University) the frequency and power stability of 5*10-6 and 1 % respectively was demonstrated.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131927051","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632957
G. Ayzenshtat, V. G. Bozhkov, A. Y. Yushchenko
The temperature dependence of drift velocity-field characteristics of two-dimensional electron gas in AlGaAs/InGaAs Pseudomorphic High Electron Mobility Transistor is determined. The saturation drift velocity in AlGaAs/InGaAs quantum well reduces from 1.55·107 to 1.3·107 cm/sec in a temperature range from 200 to 400K.
{"title":"Electron drift velocity in PHEMT","authors":"G. Ayzenshtat, V. G. Bozhkov, A. Y. Yushchenko","doi":"10.1109/CRMICO.2010.5632957","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632957","url":null,"abstract":"The temperature dependence of drift velocity-field characteristics of two-dimensional electron gas in AlGaAs/InGaAs Pseudomorphic High Electron Mobility Transistor is determined. The saturation drift velocity in AlGaAs/InGaAs quantum well reduces from 1.55·10<sup>7</sup> to 1.3·10<sup>7</sup> cm/sec in a temperature range from 200 to 400K.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131961718","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632635
A. Strizhachenko, A. Zvyagintsev, V. Chizhov, K. A. Lyalko
For the problem solution of electromagnetic compatibility and information channels packaging of satellite and TV communications in microwave bands the original narrow-band filters based on high waveguide-dielectric resonators with anisotropic materials have been created. The filters are a section of a cut-off waveguide with flanges which contains one or several dielectric inserts completely filling a resonator along a narrow waveguide wall and partially along a wide wall.
{"title":"Microwave narrow band filters","authors":"A. Strizhachenko, A. Zvyagintsev, V. Chizhov, K. A. Lyalko","doi":"10.1109/CRMICO.2010.5632635","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632635","url":null,"abstract":"For the problem solution of electromagnetic compatibility and information channels packaging of satellite and TV communications in microwave bands the original narrow-band filters based on high waveguide-dielectric resonators with anisotropic materials have been created. The filters are a section of a cut-off waveguide with flanges which contains one or several dielectric inserts completely filling a resonator along a narrow waveguide wall and partially along a wide wall.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132079934","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632425
Y. Gimpilevich, I. V. Lashchenko, V. Salamatin
The model-building technique of complex reflectance factor gage based on a calibrated twin-detector slotted-guide converter is suggested. A testing method of complex reflectance factor of working generator output and elimination of its influence to measuring results are considered.
{"title":"Calibrated twin-detector slotted-guide converter for complex reflectance factor gage","authors":"Y. Gimpilevich, I. V. Lashchenko, V. Salamatin","doi":"10.1109/CRMICO.2010.5632425","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632425","url":null,"abstract":"The model-building technique of complex reflectance factor gage based on a calibrated twin-detector slotted-guide converter is suggested. A testing method of complex reflectance factor of working generator output and elimination of its influence to measuring results are considered.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132501215","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632646
G. Avdeyenko, I. L. Lipchevskaya, E. Yakornov
The disadvantages of the existing phase direction-finders (PDF) with three element antenna array (AA) are shown for the case when the harmonic signal radio source (RS) is located in Fresnel zone of the AA. Determination methods of the direction-of-arrival (DOA) and distance to the harmonic signal RS located in Fresnel zone of the PDF's AA are shown.
{"title":"The bearing angle and distance of the harmonic signal radio source determination in Fresnel zone","authors":"G. Avdeyenko, I. L. Lipchevskaya, E. Yakornov","doi":"10.1109/CRMICO.2010.5632646","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632646","url":null,"abstract":"The disadvantages of the existing phase direction-finders (PDF) with three element antenna array (AA) are shown for the case when the harmonic signal radio source (RS) is located in Fresnel zone of the AA. Determination methods of the direction-of-arrival (DOA) and distance to the harmonic signal RS located in Fresnel zone of the PDF's AA are shown.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132563944","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632855
L. Atroshenko, N. Gorobets, L. Kazachenko, A. Onischenko, N. Rokhmanov, L. P. Safronova
A complex of agrarian reference sites was organized. It serves for the operational calibration of space-based remote sensing sensors of different ranges, validation and verification obtained of its data. The second class weather station is located at the complex. A required number of reference points and calibration for all ranges, in particular, for service SAR, is provided. We give radiophysical characteristics of reference sites in the millimeter and centimeter wavelengths in relation to microclimatic data and the parameters of the infrastructure of agricultural vegetation.
{"title":"Radiophysics features of agrarian reference sites at base subsatellite landfill \"SKRIPAI\"","authors":"L. Atroshenko, N. Gorobets, L. Kazachenko, A. Onischenko, N. Rokhmanov, L. P. Safronova","doi":"10.1109/CRMICO.2010.5632855","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632855","url":null,"abstract":"A complex of agrarian reference sites was organized. It serves for the operational calibration of space-based remote sensing sensors of different ranges, validation and verification obtained of its data. The second class weather station is located at the complex. A required number of reference points and calibration for all ranges, in particular, for service SAR, is provided. We give radiophysical characteristics of reference sites in the millimeter and centimeter wavelengths in relation to microclimatic data and the parameters of the infrastructure of agricultural vegetation.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134016096","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632657
A. Savochkin, N. M. Daninlina, D. Nacharov, R. G. Pavlenko, K. O. Syomochkin, A. N. Yatsenko
The Long Term Evolution (LTE) network organization features were analyzed. Some engineering proposals for physical layer realization simplification are presented. The OFDM modem block diagram including directional diagram forming block for MIMO and Beamforming technologies is developed. The advantages of ring antenna arrays using for cell searching are shown.
{"title":"Adaptive OFDM modem — Basis of LTE network physical layer","authors":"A. Savochkin, N. M. Daninlina, D. Nacharov, R. G. Pavlenko, K. O. Syomochkin, A. N. Yatsenko","doi":"10.1109/CRMICO.2010.5632657","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632657","url":null,"abstract":"The Long Term Evolution (LTE) network organization features were analyzed. Some engineering proposals for physical layer realization simplification are presented. The OFDM modem block diagram including directional diagram forming block for MIMO and Beamforming technologies is developed. The advantages of ring antenna arrays using for cell searching are shown.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134063306","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 : 2010-11-11DOI: 10.1109/CRMICO.2010.5632658
M. Ilchenko, T. Narytnik, V. V. Volkov
On the basis of current status of tecnologies of broadcasting it is shown that the method of information gaining by means of surface-mounted off-the-air networks is the most effective instrument of implementation of the systems of multifunction information service and integration of digital processing allows realizing of principally new approach to the television broadcasting. The single-frequency areas of synchronous broadcasting of standard DVB-T with the use of traffic currents of modulations MPEG-4, KAM-64 are considered. The results of complex investigations and the operation and maintenance of developed in Ukraine, implemented and put into production domestic radio tuner “Meridian”, digital transmitters and receiving antennas are submitted. The development trends of technologies of digital air brodcasting have been analized.
{"title":"Current status, attempts of implementation, technological development of on-air broadcasting of standard DVB-T","authors":"M. Ilchenko, T. Narytnik, V. V. Volkov","doi":"10.1109/CRMICO.2010.5632658","DOIUrl":"https://doi.org/10.1109/CRMICO.2010.5632658","url":null,"abstract":"On the basis of current status of tecnologies of broadcasting it is shown that the method of information gaining by means of surface-mounted off-the-air networks is the most effective instrument of implementation of the systems of multifunction information service and integration of digital processing allows realizing of principally new approach to the television broadcasting. The single-frequency areas of synchronous broadcasting of standard DVB-T with the use of traffic currents of modulations MPEG-4, KAM-64 are considered. The results of complex investigations and the operation and maintenance of developed in Ukraine, implemented and put into production domestic radio tuner “Meridian”, digital transmitters and receiving antennas are submitted. The development trends of technologies of digital air brodcasting have been analized.","PeriodicalId":237662,"journal":{"name":"2010 20th International Crimean Conference \"Microwave & Telecommunication Technology\"","volume":"496 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131580011","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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