NEW TECHNOLOGY OF SATELLITE ANTENNAS CONTROL ON THE STAGES OF DEVELOPMENT AND TESTING SPACE COMMUNICATION EQUIPMENT
I.Yu. Danilov, JSC «Academician M.F. Reshetnev Information Satellite Systems», head of department, Ph.D.; email@example.com
A.G. Romanov, JSC «Academician M.F. Reshetnev Information Satellite Systems», chief designer, Ph.D.; firstname.lastname@example.org
V.N. Lavrushev, Kazan National Research Technical University named after A.N. Tupolev (KAI), department of electronic and telecommunication systems, associate professor, Ph.D.; email@example.com
Yu.E. Sedelnikov, KAI, department of electronic and telecommunication systems, professor, Dr.Sci. (Tech.); firstname.lastname@example.org
Yu.I. Choni, KAI, department of electronic and telecommunication systems, professor, Ph.D.; email@example.com
This article is an overview of methods and the equipment developed by the authors and used in the course of design and manufacture satellite antennas for communications equipment in JSC Academician M.F. Reshetnev Information Satellite Systems. They include measuring of electromagnetic reflectance from parabolic dishes made of composite materials (carbon fiber or metal mesh), the accuracy of which has to meet the strict requirements to antenna’s efficiency, as well as using the near-field measurements to control the excitation distribution of an antenna array under test or to reconstruct its pattern.
Keywords: antenna measurements, composite materials, electromagnetic reflection, frequency response, microwave measurement, nondestructive testing.
PLANAR KA BAND ANTENNAS FOR PERSPECTIVE TELECOMMUNICATION FACILITIES
V.I. Klassen, JSC «Vector», General Director, Dr. Sci.(Tech.); firstname.lastname@example.org
E.Yu. Oleinik, Kazan National Research Technical University named after A.N. Tupolev (KAI), graduate student; email@example.com
Yu.E. Sedelnikov, KAI, department of electronic and telecommunication systems, professor, Dr. Sci. (Tech.); firstname.lastname@example.org
M. Shaaban, KAI, graduate student; email@example.com
The deployment of a new generation of communication systems requires the development of high-frequency ranges of wavelengths. The paper deals with a promising class of millimeter band performed based on different types dielectric waveguides. The methods of the engineering design of these antennas are presented. It is shown that the considered antenna can stand duty as the basis for a family of antennas with characteristics suitable for new telecommunications applications.
Keywords: millimeter waves, antennas, dielectric waveguide, computer-aided design methods.
ON PARAMETER CORRELATION AND DIRECTIVITY OF RING ANTENNA ARRAY
D.D. Gabriel’yan, FSUE «Rostov-on-Don research institute of radio communication», science assistant chief of scientific-technical complex, Dr. Sci. (Tech.); d. firstname.lastname@example.org
Dan.S. Fedorov, FSUE «Rostov-on-Don research institute of radio communication», engineer; email@example.com
Den.S. Fedorov, FSUE «Rostov-on-Don research institute of radio communication», head of group; firstname.lastname@example.org
Yu.A. Shokova, Don State Technical University, associate professor of the Radioelectronics Department, Ph.D.; email@example.com
The technique of research of relation between parameters and directivity characteristics of the ring antenna array (RAA) is proposed. It is produced that the formation of a given pattern was conducted in two stages, which allows to provide the required beam width and a given level of side lobes while maintaining the physical practicability of directivity RAA. The relation betweenparameters of RAA and its directivity characteristics is analyzed on the basis of the developed technique. The relationship of the parameters determining the ratio of beam width and side lobe level, with the radius and number of RAA emitters are investigated.
Keywords: ring antenna array, directivity pattern, beam width, side lobe level, amplitude and phase synthesis.
DIFFERENTIAL SPACE-TIME BLOCK CODES FOR MODERN SYSTEM OF MULTI-ANTENNA RADIOCOMMUNICATION
M.S. Tokar, Pridnestrovian State University of Taras Shevchen ko, lecturer of the Department «Quantum physics and communication»; firstname.lastname@example.org
A.L. Makarevich, Pridnestrovian State University of Taras Shevchenko, associate professor of the Department «Quantum physics and communication», Ph.D.; email@example.com
The article is devoted to the efficiency rating of the differential space-time block coding (DSTBC). The encoding scheme based on the technology of Multiple Input Multiple Output (MIMO) and relative phase modulation principle, which does not require knowledge of channel state information by the receiver on some minor assumptions. Simulation of the encoding/decoding scheme executed in MATLAB software package for different numbers of antennas on transmitting and receiving sides.
Keywords: сoherent reception, communication fading channel, spectral efficiency, differential phase modulation, space-time coding, MIMO, complex orthogonal form, maximum likelihood, SNR, noise immunity.
STC FORMING FOR LARGE-SCALE MIMO SYSTEMS
Implementation of technologies of multiantenna MIMO systems in mobile communication opens ample opportunities for research of various quasioptimal space-time coding matrixes. Increase in number of both transmitting and receiving antennas requires increase of code dimension to keep its performance. Known methods of increase code dimension are generalized. As one of methods, the way of increase in dimension of an existential Golden type code is proposed. Statistical simulation of system with proposed code in comparison with BLAST code is carried out. Simulation results presented as plots show a considerable increase in performance.
Keywords: STC, multi-antenna STC, ABBA, Hadamard, Golden STC.
CHARACTERISTIC FEATURES OF CAMPUS TRAFFIC
V.Yu. Goikhman, The Bonch-Bruevich Saint-Petersburg State University of Telecommunications, senior lecturer, Ph.D.; firstname.lastname@example.org
T.Yu. Lushnikova, The Bonch-Bruevich Saint-Petersburg State University of Telecommunications, graduate student; email@example.com
We analyzed campus traffic collected by Cisco Netflow and identified the basic patterns of the network load. The hypothesis that the main traffic of multiprotocol network is incoming confirmed. Also, the most common application layer protocol is HTTP, which has become the basis for providing OTT services. Besides, we defined the main types of traffic, revealed that about half of all transmitted data are interactive including nearly a third of all incoming information is social networking traffic.
Keywords: netflow, traffic analysing, campus network.
ANALYSIS TECHNIQUE OF ELECTRIC INTERCONNECTIONS SYSTEM IN INTEGRATED CHIPS
K.S. Gorshkov, ITMO University, Department of EEPEMS, associate professor, Ph.D.; K. Gorshkov@list.ru
An accurate and efficient method for modeling and analysis of on-chip interconnects is presented. The proposed technique is based on circuit decomposition approach and provides the recursive calculation of T-tree transfer function. The symbolic expressions of voltagetransfer functions of the large-scale integrated interconnect structures are determined. To demonstrate the validity of the proposed method, lumped T-tree networks of different levels for the microelectronic interconnect application are simulated. Excellent agreement between the modeling results and SPICE-computations is found both in frequency- and time-domains.
Keywords: circuit simulation, symbolic analysis, discrete line model, high-speed interconnections, very large scale integration (VLSI).
SIMULATION OF ELECTROMAGNETIC FIELD ON RADIOPATH WITH COPSE
A.V. Arkhipkin, CJSC SBT, chief designer; andrey. firstname.lastname@example.org
V.M. Gavrilov, Vladimir State University, professor, Ph.D.; valerian. email@example.com
R.N. Glukhov, CJSC SBT, design engineer; firstname.lastname@example.org
V.K. Dementiev, Vladimir State University, assistant lecturer; email@example.com
D.S. Smirnov, FSUE SSPE «Krona», engineer of the radiotechnical department; firstname.lastname@example.org
The results of computer simulation of the electromagnetic field generated by fixed-point connection located on the pathway with copse were presented. The output power of the receiver antennas of the mobile contact point was assessed.
Keywords: simulation of electromagnetic field, radiopath with copse, mobile communication point, fixed communication point.
WAYS OF DESIGN AND ELECTRONIC COMPONENTS
OF FAST-ACTING WIDEBAND SYNTHESIZERS
D.S. Krikov, The Central Scientific Research Radio Engineering Institute named after Academician A.I. Berg, engineer; DIMANemail@example.com
E.M. Dobychina, Moscow Aviation Institute, department of radiophysics, antennas and microwave technique, associate professor, Ph.D.; firstname.lastname@example.org
The article provides an overview of different methods of synthesizing frequency for design fast-acting wideband synthesizers using basic design schemes. The article analyzes modern electronic components for such devices made by foreign and native developers.
Keywords: frequency synthesis, phase noise level, phase-locked loop.
DESIGN OF INFOTELECOMMUNICATION TECHNOLOGY OF ELECTRICITY AND INFORMATION TRANSMISSION ON A SINGLE-WIRE LINE
V.V. Frisk, the Moscow Technical University of Communications and Informatics, department of theory of electrical circuits, associate professor, Ph.D.; email@example.com
Results of development of distribution of alternating vortex current in a single-wire transmission line are presented. The theoretical and experimental proof that single-wire lines can be used for transfer, both energy, and audioinformation is provided. It is shown that distribution of electric current in the single-wire line happens according to laws of classical physics, a vortex current in the form of the closed rings.
Keywords: single-wire line, an alternating magnetic field, eddy electric field, magnetic flux, electromagnetic induction, eddy currents.