Journal of Communications Technology and Electronics

Công bố khoa học tiêu biểu

* Dữ liệu chỉ mang tính chất tham khảo

Sắp xếp:  
Analysis of a horn-lens TEM antenna
Journal of Communications Technology and Electronics - Tập 57 - Trang 1031-1038 - 2012
N. A. Efimova, V. A. Kaloshin, E. A. Skorodumova
Matching and radiation characteristics of a horn-lens TEM antenna are studied theoretically and experimentally in an ultra-wide frequency band. Theoretical results are obtained by means of electromagnetic modeling on the basis of the finite-element method. Antennas with different geometries of the lens and different methods of excitation of the TEM horn are considered. Direct excitation by a coaxi...... hiện toàn bộ
Structure and thermomechanical properties of fast-quenched Ti2NiCu alloy ribbons with various crystalline phase fractions obtained by means of annealing by electric current
Journal of Communications Technology and Electronics - - 2017
A. N. Akbasheva, А. В. Иржак, V. V. Istomin-Kastrovskii, V. V. Koledov, Д. С. Кучин, П. В. Лега, N. Yu. Tabachkova, В. Г. Шавров, A. V. Shelyakov
Dao động được điều khiển trong một hệ thống có độ trễ khi có sự hiện diện của tác động tham số và tự tham số Dịch bởi AI
Journal of Communications Technology and Electronics - Tập 53 - Trang 1412-1417 - 2008
E. V. Kal’yanov
Các mô hình mới của một bộ dao động có độ trễ dựa trên một bộ dao động phi điều hòa với một lực phục hồi phi tuyến. Các chế độ điều khiển dao động tham số và tự tham số được xem xét. Phân tích số được sử dụng để chứng minh sự kích thích hỗn loạn phát triển ở một phi tuyến tính tương đối yếu của đặc trưng biên độ.
#dao động có độ trễ #lực phục hồi phi tuyến #điều khiển dao động tham số #phân tích số #hỗn loạn
Analysis of a waveguide array with semitransparent walls for formation of flat-topped partial patterns
Journal of Communications Technology and Electronics - Tập 56 - Trang 249-258 - 2011
S. P. Skobelev
A complete 2D mathematical model of an array of single-mode waveguides containing waveguide sections with semitransparent walls, which were proposed earlier for formation of flat-topped partial patterns, is developed. The semitransparent walls are formed from rows of cylindrical conductors. The model is constructed on the basis of the method of projection matching of the fields in the apertures of...... hiện toàn bộ
Method for Autoregression Modeling of a Speech Signal Using the Envelope of the Schuster Periodogram as a Reference Spectral Sample
Journal of Communications Technology and Electronics - Tập 68 - Trang 128-134 - 2023
V. V. Savchenko
The problem of autoregressive modeling of a speech signal based on the data of the discrete Fourier transform in the mode of a sliding window of small duration (milliseconds) is considered. The problem of stability of the formed autoregressive model is investigated. To overcome it, it is proposed to use the envelope of the Schuster periodogram as a reference spectral sample. A new method of autore...... hiện toàn bộ
The permittivity of phenylone-based composites with nickel particles
Journal of Communications Technology and Electronics - Tập 56 - Trang 142-144 - 2011
U. Abdurakhmanov, F. T. Boimuratov, G. I. Mukhamedov, A. S. Fionov, G. Yu. Yurkov
Composites consisting of a phenylone matrix and nickel-bearing particles are fabricated. The permittivity of composites with nickel particles near the percolation threshold is studied. The experimental dependence of the permittivity on the bulk content of nickel nanoparticles in a composite below this threshold is found to be different from that calculated using the percolation theory.
Propagation of short pulses in irregular electromagnetic waveguides with a variable topology of the cross section
Journal of Communications Technology and Electronics - - 2010
M. N. Golikov, V. I. Koroza, A. S. Polyakov
A method for real-time electrodynamic calculation of the dynamics of propagation and transformation of short ultrawideband electromagnetic pulses (UWB EMP) in irregular waveguides with discontinuous junctions is presented. The results of numerical simulation of a pulse passing through a junction of a coaxial waveguide having doubly connected cross sections and a waveguide horn with singly connecte...... hiện toàn bộ
Optimization of the spectral efficiency in MIMO cellular wireless communications
Journal of Communications Technology and Electronics - Tập 54 - Trang 76-91 - 2009
L. I. Ponomarev, A. I. Skorodumov
Expressions are derived that make it possible to calculate and optimize the spectral efficiency (SE) of multiple-input-multiple-output (MIMO) cellular wireless communication systems (WCSs) with allowance for the interaction of radiators in the receiving and transmitting antennas of the MIMO systems, the properties of the deterministic radio channel, and the presence of directionally concentrated i...... hiện toàn bộ
Surface waves on longitudinally bent and gradually curved boundaries of current-conducting media with a high conductivity, Zenneck wave
Journal of Communications Technology and Electronics - Tập 60 - Trang 577-579 - 2015
V. V. Shevchenko
Quantitative estimates are obtained for the smallest values of the radii of curvature of longitudinal bends of the boundaries of highly conducting media and the largest transverse deviations of gradually curved (irregular) boundaries from the plane of the corresponding surface at which boundary surface waves propagate along the boundaries of such media without a substantial additional (to absorpti...... hiện toàn bộ
Simulation of the properties of microstructured optical fibers
Journal of Communications Technology and Electronics - Tập 51 - Trang 1218-1226 - 2006
V. A. Aksenov, I. L. Vorob’ev, V. V. Voloshin, K. V. Zagorodnov, G. A. Ivanov, V. A. Isaev, A. O. Kolosovskii, E. N. Korshunova, S. A. Nikitov, S. K. Morshnev, Yu. K. Chamorovskii, A. D. Shatrov
A new method for calculating the radiation loss and chromatic dispersion of leaky modes propagating in microstructured (holey) optical fibers (MOFs) with circular air-filled channels is proposed and implemented numerically. It is shown that the results are in good agreement with both the known numerical data and with the experimental data obtained for two types of fabricated MOFs that contain, res...... hiện toàn bộ
Tổng số: 2,358   
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 10