Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
77
16
2018
DIFFRACTION ANTENNAS. LINEAR STRUCTURES ON THE BASIS OF A MODIFIED GOUBAU LINE
1397-1408
10.1615/TelecomRadEng.v77.i16.10
V. Z.
Mazur
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy
of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
K. Yu.
Sirenko
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Yuriy
Sirenko
IRE NAN Ukraine
A. P.
Yevdokymov
O.Ya. Usikov Institute for Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12 Academician Proskura St., Kharkiv 61085, Ukraine
diffraction radiation antenna
modified Goubau line
periodic system of active dipoles
wave lens
antenna for a shipborne S-band radar navigator
A new approach to construction of linear diffraction radiation antennas is suggested. A modified (partially screened) Goubau line is used for the first time in the capacity of the open line supporting propagation of the surface wave, while the beam forming structure represents a periodic system of active and passive (wave lens) dipoles
ELECTROMAGNETIC WAVE SCATTERING BY A SCREEN OF FINITE THICKNESS AND CONDUCTIVITY
1409-1421
10.1615/TelecomRadEng.v77.i16.20
S. V.
Nechitaylo
Ivan Kozhedub Kharkiv National University of Air Force, 77/79 Sumska St., 61023 Kharkiv, Ukraine
V. M.
Orlenko
Ivan Kozhedum National Air-Force University of Kharkiv, 77/79, Sumskaya Str., Kharkiv 61023, Ukraine
O.
Sukharevsky
Ivan Kozhedub Kharkiv National University of Air Force, 77/79 Sumska St., 61023 Kharkiv, Ukraine
V.
Vasylets
Ivan Kozhedub Kharkiv National University of Air Force, 77/79 Sumska St., 61023 Kharkiv, Ukraine
unclosed screen
conductivity
integral equation
scattering characteristics
A technique is suggested for calculating electromagnetic wave scattering by well-conducting unclosed screens of finite thickness. The technique is based on the applying of an integral equation for the E-field that takes into account the approximate Leontovich-Schukin boundary conditions on the surface of a well-conducting half-space. Scattering cross-sections in the resonance wavelength range are calculated for spherical screens of various conductivities and thicknesses
PRINCIPLES OF DEVELOPMENT OF THE TERAHERTZ BAND TELECOMMUNICATION SYSTEM BASED ON THE TECHNOLOGY OF HARMONIC SIGNAL AS THE INFORMATION CARRIER
1423-1440
10.1615/TelecomRadEng.v77.i16.30
T. M.
Narytnyk
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic
Institute" (NTUU "KPI") Peremohy Ave, 37, Kyiv, 03056, Ukraine
Physical principles of introduction and reproduction of the information transmitted using the harmonic signal as the information carrier, are analyzed. Based on the performed theoretical calculations confirmed by the results of modeling, there are formed the principles and rules of determining optimal parameters of the ultra-wideband terahertz frequency range communication system on the basis of the technology of electronics using the harmonic signal as the information carrier. The necessity of using the terahertz frequency band while deploying future super high throughput rate telecommunication systems is reasoned. Analysis of the state-of-the-art problem is performed, the direction of research is selected and the mission is set with regards to creation of the terahertz band broadband access telecommunication system with the Gigabit throughput rate within the operating frequencies range of 130…134 GHz. Characteristics of the signal propagation path and defining of the signal losses under the conditions of the terahertz frequency band radio relay system operation are analyzed. On the basis of the analysis performed it is shown that operation of radio relay links in the terahertz band allows practically disregarding the refraction and interference of the electromagnetic waves reflected from the obstacles in the radio signal propagation domain that occurs primarily under the conditions of a dense urban building. The domains of the terahertz band frequencies, which are most of all suitable for use in the radio relay communication lines, are determined. Physical modeling of the super high data rate former is performed on the basis of the multifrequency multiplexing of the OFDM-modulated digital flows, testing at the experimental stand and the optimization aimed at attaining of the maximal throughput capacity of the channel used for transmission of the digital information of the flow are fulfilled in the Ethernet format using the developed software means. The created software and hardware means allowed attaining, for the first time, the general channel data rate of up to 1.2 Gbps at the full duplex. There are developed the block circuit diagram of the system transceiver path – the frequency converters with subharmonic pumping, the heterodyne using a high-stability setting quartz oscillator with the subsequent circuitry of multiplying and amplifying cascades, the bandpass filter using a thin metal plate in the E-plane of the 1.6×0.8 mm waveguide channel, and the horn-lens antenna.
POWER-EFFICIENT LTE MACRO eNodeB: A COMPREHENSIVE SURVEY
1441-1462
10.1615/TelecomRadEng.v77.i16.40
Brijesh
Shah
RF Quality Assurance Department, Reliance Jio Infocomm Ltd., Reliance Corporate Park, Ghansoli, Navi Mumbai, Maharashtra, 400701, India
G.
Dalwadi
RF Quality Assurance Department, Reliance Jio Infocomm Ltd., Reliance Corporate Park, Ghansoli, Navi Mumbai, Maharashtra, 400701, India
H.
Shah
Department of Electronics and Communication, Dharmsinh Desai University, College Road, Nadiad, Gujarat, 387001, India
N.
Kothari
Department of Electronics and Communication, Dharmsinh Desai University, College Road, Nadiad, Gujarat, 387001, India
Long Term Evolution (LTE)
efficient system integration
macro eNodeB
power amplifier
peak to average power reduction
Macro evolved Node B (eNB) is an inevitable element to provide ubiquitous coverage for mobility in the urban area and the long reach in the rural area. But, it consumes more than 70% of total power consumption of access network. Enabling multiple power efficient techniques increases the power efficiency of the eNB with the cost of adding non-linearity. Tradeoff between power efficiency and linearity while selecting the combination of various power efficient techniques including peak to average power reduction, N-way Doherty power amplifier (DPA), efficient system integration and turning on and off eNB based on data traffic are discussed in this paper. Simulation results reveals that the integrating of multiple power efficient techniques simultaneously can lead up to 46.9% saving in the power consumption with respect to conventional macro eNB along with 2-way DPA. This reduction will be benefitted in terms of operational expenditure (OPEX) of the access networks and CO2 emissions from cellular network.
FEATURES OF VIDEO PULSE PARAMETERS SIMULATION FOR STUDYING SPECTRA OF SECONDARY ELECTROMAGNETIC RADIATION
1463-1470
10.1615/TelecomRadEng.v77.i16.50
V. I.
Zabolotny
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
V. I.
Perepadia
Kharkiv National University of Radio Electronics, 14 Nauka Ave, Kharkiv 61166, Ukraine
secondary electromagnetic radiation
initiated simulation
the Monte-Carlo method
video tour
video pulse
front of video emulsion
spectrum of video pulse
Features of video-pulse parameters simulation for studying spectra of secondary electromagnetic radiation are described on the basis of the Monte-Carlo statistical test method. It is established that the key parameters in terms of the possibility of information leakage are: the length of the smooth transition of the signal between the linear parts and the length of the approximation of the linear component of the pulse front, which determine the shape of the signal. Using a probabilistic approach, a method for determining the density distribution of the probability of electric field intensity at the boundary of the controlled zone is described to assess the technical protection of information.
NUMERICAL ANALYSIS OF THE TWO-FREQUENCY APPROACH TO DETERMINE TORCH DISCHARGE RESISTANCE WITH OR WITHOUT ITS EQUIVALENT INDUCTANCE BEING TAKEN INTO ACCOUNT
1471-1484
10.1615/TelecomRadEng.v77.i16.60
A. O.
Puzanov
A. Usikov Institute of Radio Physics and Electronics, National Academy of Sciences of Ukraine, 12, Academician Proskura St., Kharkov 61085, Ukraine
torch discharge
Neiman's model
torch discharge inductance
torch discharge resistance
The torch discharge (TD) is widely applied in a number of areas of science and technology. Considerable lag in theoretical research and rapidly growing needs are those factors that make the solution of many practical-oriented TD-related problems so relevant. In this paper, the author continues to explore his novel approach to measuring the TD resistance (Rd) taking into account the TD inductance L. The numerical calculations are supplemented by previously estimated application limits of this model. The sought resistance Rd is considered to be frequency independent within the theory. Performed estimations and calculations confirm the applicability of the approach presented, either with the TD inductance being taken into account or not, in the frequency range from 1·10-3 to 3.0 GHz. The study revealed that for TD of 1 kW or less it should be decided in every case individually whether to take the inductance in the account or not, and which two frequencies f0,1 are the proper choice for the measurement, and, if necessary, consider the feasibility of exciting similar TD at two quite different frequencies. When the inductance was neglected, the accuracy of Rd calculations proved to depend on the TD elevation above ground only slightly, and to rise significantly if TD diameter reduced, TD became longer, the measured Rd were small (f0,1 approach each other. In some cases, due to these reasons, the classical Neiman's scheme should inevitably be modified to include the equivalent inductance, thus the calculation formulae should be adapted respectively. It was shown that the resonance frequency fr of the discharge circuit is approximately proportional to frequency fmax, which is the upper limit of the frequency range where the circuit theory remains applicable for the discharge modeling, and fmax < fr . Thus, if fr and fmax are known, we can specify the possible values of function α, which is a ratio of voltages required for TD to maintain its electrical and geometrical characteristics. The suggested approach results in more effective using of industrial resources.