Experimental studies of electromagnetic compatibility between 5G network transmitters and receivers operating in Earth Exploration-Satellite Service and Space Research Service in the 27 GHz band

2021 ◽  
Author(s):  
Valery Tikhvinskiy ◽  
Victor Koval ◽  
Pavel Korchagin ◽  
Altay Aitmagambetov
Keyword(s):  
Electromagnetic Compatibility ◽  
Experimental Studies ◽  
Space Research ◽  
5G Network ◽  
Satellite Service ◽  
Research Service

scholarly journals MULTIPOSITION TELECOMMUNICATION SYSTEM OF ELECTROMAGNETIC EMISSION INFLUENCE ON SATELLITE BROADBAND LINES OF RADIO COMMUNICATION

2020 ◽  
pp. 75-89
Author(s):  
T.N. Narytnik ◽  
V.G. Saiko ◽  
V.I. Korsun ◽  
N.M. Sivkova ◽  
S.I. Semerey
Keyword(s):  
Electromagnetic Compatibility ◽  
Radiation Power ◽  
Power Level ◽  
Experimental Studies ◽  
Electromagnetic Emission ◽  
Limited Area ◽  
Radio Communication ◽  
Telecommunication System ◽  
Method Of Calculation ◽  
Blocking Device

The structure of construction of a multiposition system (BS) of electromagnetic radiation influence on satellite broadband radio channels, consisting of synchronously operating spatially spaced low-power transceivers N_ts and having a fully connected topology network (similar to B) . As a result, it is possible to concentrate the radiating power in a given direction. By increasing the base of the transmission system, when its dimensions become comparable to the distance to the object under study, the wave front is no longer planar and the radiating power can be concentrated not only in the direction but also in the distance (focus in a certain area of space). Along with the N_ts collaboration mode, the transceivers of the satellite television telecommunication system can operate autonomously (independently of each other) and alternately, in accordance with the control law, which increases the flexibility of the BS operation. In addition, the use of several simultaneously working emitters can increase the range of BS. Reducing the power level of the signals emitted by individual positions increases the secrecy of the system, since the value of the resulting component of the electric field, determined by the geometric sum of the fields of individual emitters, will be high in a limited area of space, as well as electromagnetic compatibility with other electronic and electronic means one area in the common frequency band. The method of calculation of mutual interference with the sharing of frequencies of the satellite network and the multipoint satellite telecommunication system is presented and a practical experiment will be conducted to block the operation of the terrestrial satellite receiving station by external radio interference. The results of experimental studies have shown that the radiation power of this instance of the microwave blocking device is sufficient to block the operation of the terrestrial satellite receiving station at a distance of up to 30 km, in the presence of direct visibility between the antenna of the blocking device and the satellite receiving transceiver, which can have both a positive and a negative effect on the practical application of a microwave blocking device..

Методика расчетной оценки ЭМС радиоэлектронных средств с направленными антеннами в зоне Френеля

2020 ◽  
Author(s):  
M.N. Kupin ◽  
I.V. Chervyakov ◽  
E.P. Kolesnikov
Keyword(s):  
Short Distance ◽  
Electromagnetic Compatibility ◽  
Fresnel Zone ◽  
Electronic Devices ◽  
Experimental Studies ◽  
Directional Antennas ◽  
Radio Electronic

Based on experimental studies, it is proposed a procedure for evaluation of electromagnetic compatibility of radio-electronic devices with directional antennas when antennas of these devices are placed at a short distance from each other in the Fresnel zone. На базе экспериментальных исследований предлагается методика оценки электромагнитной совместимости (ЭМС) радиоэлектронных средств (РЭС) с направленными антеннами при размещении антенн этих РЭС на малом расстоянии друг от друга (в зоне Френеля).

scholarly journals Sharing Spectrum UE LTE and Air-Traffic Control Radars in 800 MHz Band

2017 ◽  
pp. 49-53 ◽  
Author(s):  
Valery Tikhvinskiy ◽  
Grigory Bochechka ◽  
Pavel Korchagin ◽  
Shakhmaran Seilov ◽  
Andrey Gryazev
Keyword(s):  
Traffic Control ◽  
Rural Areas ◽  
Air Traffic Control ◽  
Electromagnetic Compatibility ◽  
Experimental Studies ◽  
Air Traffic ◽  
Mobile Service ◽  
Lte Networks ◽  
Primary Basis ◽  
Digital Dividend

The need to ensure LTE network coverage in sparsely populated and rural areas of Europe (ITU Region 1) has led to a massive use of 800 MHz band (band 20) with its good characteristics of radio wave propagation in LTE networks. However, the frequency band of 800 MHz called “digital dividend” in Region 1 is used on a primary basis not only by the terrestrial mobile service but also by air-traffic control radars (ATCR) that can lead to the creation of harmful interferences at the receivers’ input of ATCR. Such scenarios of mutual interferences became possible after granting licenses for LTE-800 frequencies to operators in such countries as Azerbaijan, Kazakhstan, Russia and other CIS countries, so this problem should be solved by operators at the deployment of LTE-800 networks in airports and areas close to them. So far, for such scenarios the ITU and CEPT have not formulated criteria for interference protection. The proposed protection criteria for receivers of ATCR from user devices’ interferences of LTE-800 networks were tested by experimental studies and can provide a solution to the electromagnetic compatibility (EMC) problem in a complex electromagnetic environment of modern airports and cross-order coordination of 800 MHz frequency bands in Region 1.

scholarly journals Power Balance and Power Factors of Distorted Electrical Systems and Variable Speed Asynchronous Electric Drives

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1676
Author(s):  
Viktor Petrushyn ◽  
Vasiliy Horoshko ◽  
Juriy Plotkin ◽  
Nurgul Almuratova ◽  
Zhanar Toigozhinova
Keyword(s):  
Power Factor ◽  
Electromagnetic Compatibility ◽  
Frequency Converter ◽  
Asynchronous Motor ◽  
Experimental Studies ◽  
Harmonic Distortion ◽  
Operating Mode ◽  
Measuring Instruments ◽  
Electrical Systems ◽  
Grid Side

In this study, power quality coefficients that determine the distortion of electrical systems are established. The power factor is chosen as a universal criterion for electromagnetic and electro-energetic compatibility of distorted sources and distorting loads. Mathematical expressions are obtained for its calculation in various cases of electrical systems distortion. As an application example, power balances and power factors of a variable frequency asynchronous drive system are considered. The criterion: the power factor not only determines the energy and electromagnetic compatibility of the drive with power supply, but it also evaluates drive efficiency. Experimental studies were carried out under usage of inexpensive, commonly used measuring devices both on the grid side of the frequency converter and on the asynchronous motor side. The studied coefficients were determined in two ways: measuring instruments and analysis of oscillograms. The second method for determining the above coefficients from oscillograms of currents and voltages also requires finding the total harmonic distortion (THD) of currents and voltages for the corresponding load adjusting points. The similarity of the obtained results shows that both of these methods can be applied. According to the operating mode of the load, the criterion is calculated as an average range in a certain range of speed control, or it is determined by considering a given tachogram of speed changes. The results of experimental studies confirm the correctness of the theoretical provisions.

scholarly journals Experimental studies of the effect of a hybrid inverter on power quality

2021 ◽  
Vol 1 (3) ◽  
pp. 2-9
Author(s):  
YA.E. Shklyarskiy ◽  
◽  
A.N. Skam'in ◽  
O.S. Vasil'kov ◽  
◽  
...  
Keyword(s):  
Power Quality ◽  
Alternative Energy ◽  
Electromagnetic Compatibility ◽  
Experimental Studies ◽  
Parallel Operation ◽  
Electrical Networks ◽  
Active Resistance ◽  
Operating Modes ◽  
Voltage Distortion ◽  
Harmonic Composition

The integration of alternative energy sources and various technologies of distributed generation with power electronic converters in electrical networks leads to an increase in the diversity of the network, but at the same time to the tightening of the requirements of various standards, for exam-ple, a limited harmonic composition of the generated current, continuous operation of the device with voltage distortion, etc. Taking this fact into account, the paper presents the results of experi-mental studies of the effect of a hybrid inverter on power quality indicators at the point of common connection. A laboratory bench was developed. It consists of a three-phase hybrid inverter, a stor-age battery, a linear load in the form of an active resistance and a capacitor unit. The inverter has been connected to the power supply for parallel operation to supply the load in the form of active resistance. The modes of battery charging and power delivery to the network with two variations of the system resistance were investigated. The power output from the inverter varied from 500 W to 2 kW in the mode of generating electricity to the grid, and in the range from 50 to 300 W in the bat-tery charging mode. As a result of laboratory studies, the dependences of the total harmonic current distortion (THDI) were obtained for various operating modes of the inverter and system resistances. On the basis of the obtained results, an algorithm for the selection of methods and means to ensure electromagnetic compatibility during operation of the load and a hybrid inverter with energy storage was developed. It makes it possible to reduce the effect of hybrid inverters on the voltage distortion of the supply network.

scholarly journals Experimental Study of the Characteristics of Band-Passed Ultra-High Frequency Filters with Increased Protective Band in the Interest of Ensuring Electromagnetic Compatibility

2021 ◽  
pp. 272-280
Author(s):  
Valery P. Berdyshev ◽  
Andrey V. Zhuravlev ◽  
Nikita V. Kopylov ◽  
Vladimir A. Kopylov ◽  
Vitaly V. Loy
Keyword(s):  
High Frequency ◽  
Electromagnetic Compatibility ◽  
Stop Band ◽  
Experimental Studies ◽  
Bandpass Filters ◽  
Wave Resistance ◽  
Ultrahigh Frequency ◽  
Manufacturing Tolerances ◽  
Technological Limitations ◽  
Attenuation Characteristics

The article presents the structure of the method for the synthesis of microwave bandpass filters (BPF) on non-uniform lines, which makes it possible to select the structure and parameters of the BPF that provide the maximum length of the stop band to meet the requirements of electromagnetic compatibility (EMC) with given restrictions on the attenuation characteristics in the passband and barrier bands. and the established design and technological limitations on the drop in wave resistance and manufacturing tolerances. The results of experimental studies of the characteristics of ultrahigh-frequency bandpass filters with an increased protective band in order to ensure EMC are presented

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