Перегляд за автором "Vavriv, D.M."

Сортувати за: Порядок: Результатів:

  • Nimets, A.Y.; Vavriv, D.M. (Вопросы атомной науки и техники, 2015)
    The bistablity onset due to the interaction of high- to low-frequency oscillations in the Duffing oscillator is considered. It is shown that such interaction results in arising of additional bistable states, which has a ...
  • Buts, V.A.; Vavriv, D.M.; Tarasov, D.V. (Радіофізика та електроніка, 2013)
    Chaotic instabilities and frequency transformations caused by the interaction of oscillators are important effects for many applications. We review these effects from the point of view of their influence on the dynamics ...
  • Manzhos, S.; Schuenemann, K.; Sosnytskiy, S.V.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2000)
    Potentials of the backward-wave oscillator (BWO) with an inclined electron beam (the clinotron) as a source of electromagnetic radiation in THz regions are examined. A self-consistent collective electron-wave interaction ...
  • Vavriv, D.M.; Vynogradov, V.V.; Volkov, V.A.; Kozhyn, R.V.; Bezvesilniy, O.O.; Alekseenkov, S.V.; Shevchenko, A.V.; Belikov, A.A.; Vasilevskiy, M.P.; Zaikin, D.I. (Радиофизика и радиоастрономия, 2006)
    A Ku-band airborne SAR, which is a cost effective system in terms of the development and exploitation costs, has been recently developed and tested at the Institute of Radio Astronomy of the National Academy of Sciences ...
  • Avtomonov, N.I.; Sosnytskiy, S.V.; Vavriv, D.M. (Вопросы атомной науки и техники, 2006)
    Particle simulations of mm-wavelength magnetrons with cold secondary-emission cathodes show that such important practical characteristics as the output power, efficiency, and operation current are dependent on ...
  • Sekretarov, S.S.; Vavriv, D.M.; Volkov, V.A.; Natarov, M.P.; Glamazdin, V.V. (2008)
    An original electrically switchable, Ka-band slotted waveguide antenna array system has been recently developed, produced, and tested. The system consists of four identical sections, which are connected to a radar ...
  • Bezvesilniy, O.O.; Peters, G.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2003)
    Real-time mapping of the parameters of precipitating water clouds and rain making use of a vertically-directed Doppler radar is an important problem. In this paper, an algorithm based on an independent estimation of the ...
  • Bezvesilniy, O.O.; Vavriv, D.M.; Volkov, V.A.; Kravtsov, A.A.; Bulakh, E.V.; Vinogradov, V.V.; Sekretarov, S.S. (Радиофизика и радиоастрономия, 2015)
    An experimental ground-based synthetic aperture radar (GB-SAR) system operating at Ka-band has been developed. The system is designed to be operated from a top a hill or from a building roof, etc. for imaging the underlying ...
  • Volkov, V.V.; Vavriv, D.M.; Bulakh, E.V.; Kravtsov, A.A. (Радиофизика и радиоастрономия, 2014)
    A wideband high sensitivity microwave receiver operating within 0.5 to 19.5 GHz and providing a 1.1-GHz instantaneous bandwidth is described. The receiver shows a noise figure as low as 10 dB and the input third-order ...
  • Belikov, A.A.; Kozhyn, R.V.; Trush, B.V.; Vavriv, D.M.; Volkov, V.A. (Радиофизика и радиоастрономия, 2002)
    95 GHz, 2 kW radar transmitters with the output pulse duration of 10 ns and the pulse repetition frequency of 40 kHz are presented. The transmitters are based on the spatial-harmonic magnetron with cold secondaryemission ...
  • Schuenemann, K.; Sosnytskiy, S.V.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2000)
  • Vavriv, D.M.; Volkov, V.A.; Bormotov, V.N.; Vynogradov, V.V.; Kozhyn, R.V.; Trush, B.V.; Belikov, A.A.; Semenyuta, V.Ye. (Радиофизика и радиоастрономия, 2002)
    A review is given of recent activities undertaken in the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine for the development of millimeter-wave radars. The radars constructed include cloud radars ...
  • Bezvesilniy, O.O.; Gorovyi, I.M.; Vynogradov, V.V.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2011)
    Deviations of the aircraft trajectory and instabilities of the aircraft orientation lead to non-uniform illumination of the ground by the antenna beam and, as a result, to radiometric errors in radar images obtained with ...
  • Sosnytskiy, S.V.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2015)
    An algorithm for real time signal processing with high accuracy of determining both frequency and time characteristics of RF signals is proposed. The algorithm provides frequency resolution through FFT processing and pulse ...
  • Shygimaga, D.V.; Vavriv, D.M. (Вопросы атомной науки и техники, 2001)
    Roads to chaos for systems with the interaction of high- and low-frequency oscillations are considered. Results are presented for quisi-periodically forced Duffing and Van-der-Pole oscillators and a two-mode system driven ...
  • Bezvesilniy, O.O.; Gorovyi, I.M.; Sosnytskiy, S.V.; Vavriv, D.M.; Vynogradov, V.V. (Радиофизика и радиоастрономия, 2011)
    Synthetic aperture radar (SAR) systems onboard small aircrafts suffer from trajectory deviations and instabilities of antenna orientation. These kinds of motion errors lead to significant geometric distortions in SAR ...
  • Buts, V.A.; Vavriv, D.M.; Tarasov, D.V. (Вопросы атомной науки и техники, 2013)
    Some features of dynamics of ensembles of coupled linear and nonlinear oscillators are investigated. It is shown that spectral characteristics of this dynamics essentially depend not only on quantity of the oscillators ...
  • Buts, V.A.; Vavriv, D.M. (Вопросы атомной науки и техники, 2018)
    The dynamics of nonreciprocally coupled oscillators and coupled waves is studied. Such coupling can lead to converting the energy of low-frequency (LF) oscillations to the energy of high-frequency (HF) oscillations. ...