Proceedings of NIIR, №2, 2014
UDC 621.396
V. Butenko, A. Bagdasaryan.
Radio frequency identification tags based on surface acoustic waves and SAW RFID systems: Patent review
Summary. In recent years there was a sustained interest in radio frequency identification (RFID) technologies, including special attention to rapidly developing SAW technologies and RFID systems based on them. This paper gives a review of Russian patents in this field.
Кeywords: radio frequency identification tag, surface acoustic waves, interdigital transducer, SAW reflector.
UDC 004
V. Saryan, N. Sushchenko
Development of a model of Information and Communication Services based on the theory of purposeful systems
Summary. The paper is devoted to the development of a model of Information and Communication Services as the primary means for creating useful effect of information and communication technologies for the consumer in today's information society. The model is defined by the set of concepts necessary to formally describe any information and communication service. Also the indicators of limited resource efficiency are categorized to determine the quantitative characteristics of information and communication services. As a basis for the model the theory purposeful systems is chosen.
Keywords: Information and communication services, information society, indicators, efficiency, purposeful systems, limited resources.
UDC 621.396.67
A. Plotnikov, A. Trofimov, V. Yudin
Active energy equivalence conditions between receiving antenna and passive lossless antenna
Summary. The paper compares the active receiving antenna and concerted passive lossless antenna in terms of energy radio receiving system. We derive relations defining conditions of energy equivalence antennas taking into account all noises including receiver noise, which is a feature of the proposed approach (antenna and receiver are not considered separately from each other, but as a single radio receiving system). The analysis of the obtained relations and the results of calculations are presented.
Keywords: active receiving antenna, reflection losses, external noise, self-noise ratio, signal-to-noise ratio, noise factor, sensitivity, radio receiving system, low noise amplifier, radio receiver.
UDC 621.396.67
A. Plotnikov, A. Trofimov, V. Yudin
Assessing the energy efficiency of receiving active antennas based on a comparison with a passive lossless antenna matched receiver noise
Summary. The problems of estimating the energy efficiency of active receiving antennas are discussed. The approach is based on using as a reference matched passive antenna (or its equivalent - active antenna, energetically equivalent coherent passive antenna). Feature of the proposed approach is the consideration of the receiver noise (along with external noise and internal noise of active antenna) where antenna and receiver are considered not separately, but as a single radio receiving system. Simple visual evaluation form of energy efficiency is substantiated. The results of calculations are presented.
Keywords: active receiving antenna, reflection losses, external noise, self-noise ratio, signal-to-noise ratio, noise factor, sensitivity, radio receiving system, low noise amplifier, radio receiver.
UDC 621.396.67
S. Ermolaev
Calculation of dual-reflector antenna with offset feed, using complex coordinates
Summary. The paper considers a calculation of dual-reflector antenna with offset feed, using complex coordinates. It gives an example of calculated reflector and subreflector surfaces of dual- reflector Gregory antenna system. The possibility to transform co-axial axisymmetric wave fronts by non-symmetrical reflectors is also shown.
Keywords: reflector antenna, synthesis of reflector antenna, reflector antenna of special profile.
UDC 621.396
E. Novikov, E. Kosyakov, A. Pavlov
Dynamic reservation of a radio resource in satellite communication networks by transfer of the self-similar traffic
Summary. The paper offers a solution for radio resource effective operative redistribution problem in satellite communication networks between active and passive radio directions. The optimum moment of an additional resource inquiry is defined taking into account statistical characteristics of the incoming self-similar traffic and size of delay signals management in a satellite radio link. The algorithm is developed and studies are conducted for cases of the communication organization through low channel satellite communication station when the incoming stream is formed by several subscribers; the process is described by interrupted poisson process.
Keywords: satellite communication, radio resource, interrupted poisson process, modulated markov process, nonlinear programming, dynamic reservation, self-similar traffic.
UDC 621.394.
E. Kapilov, A. Makarov, P. Savochkin
Option of realization of the output cascade of a heavy-duty broadband radio transmitter on solid-state components
Summary. The paper considers the option of modular creation of 2nd kW power amplifier to be built in the near future. The paper investigates the matters of thermostabilization, obtaining linear receiving AFC and matching with the antenna in 4 GHz frequency range to be implemented in communication systems of various frequency bands.
Keywords: amplifier, ultra-wide band, Wilkinson splitter.
UDC 654.01
S. Trufanov, S. Shvetz
Prospects for further development of professional radiocommunication system for the Ministry of Internal Affairs of the Russian Federation
Summary. The paper considers the state and prospects for further development of existing systems of professional radio communications for Divisions of the Ministry of Internal Affairs of the Russian Federation. The paper shows shortcomings of existing conventional analogue systems. Based on the analysis performed, proposals have been developed on the creation and modernization of digital radio communication systems using different standards.
Keywords: digital trunking radio communication, radio communication systems for the Ministry of Internal Affairs, APCO 25 standard, DMR standard.
UDC 621.397.3
Y. Nikitin
Comparative review of modern methods of frequency synthesis: compensation loops and pulsed PLL
Summary. The paper reviews modern methods of active digital frequency synthesis (ADS) using compensation loops and pulsed phase-locked-loops (P-PLL).
Keywords: digital frequency synthesis, finite-state machine, pulse counter, pulsed phase-locked-loop, spurious spectral components.
UDC 535.131
N. Lemeshko
Reducing spectrum of currents in numerical analysis of interference emission
Summary. The paper proposes a method for intentional reducing spectrum of currents, to be used in numerical analysis of emitted radio interference. It includes higher order Butterworth filters with reasonably selected characteristics or similar mathematical processing.
Keywords: electromagnetic compatibility, modeling, numerical analysis, virtual certification, emitted radio interference.
UDC 535.131
N. Lemeshko, S. Zakharova
Simplification of calculations for emitted radio interference, taking into account specifics of electronic hardware structure
Summary. The paper proposes simplified methods which are taking into account specifics of hardware structure in numerical analysis of emitted radio interference from radio electronic systems. The proposed system of simplifications allows significant reduction of computations in modeling EMC tests.
Keywords: electromagnetic compatibility, virtual certification, modeling, calculation, hardware structure.
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