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Перегляд Радиофизика и радиоастрономия за назвою

Репозиторій DSpace/Manakin

Перегляд Радиофизика и радиоастрономия за назвою

Сортувати за: Порядок: Результатів:

  • Enhancement of the Quantum Dot Luminescence in All-Dielectric Metamaterial 
    Khardikov, V.V.; Prosvirnin, S.L. (Радиофизика и радиоастрономия, 2013)
    We propose a simple design of an all-dielectric silicon-based planar metamaterial that manifests an extremely sharp resonant reflection and transmission at the wavelength of about 1550 nm due to both low dissipative losses ...
  • Estimating Cloud and Rain Parameters from Doppler Radar Data 
    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 ...
  • Evolution Equations for the Time-Domain Modes in Lossy Waveguides 
    Tretyakov, O.A. (Радиофизика и радиоастрономия, 2002)
    Complete set of the time-domain modes is presented for a waveguide regular geometrically along its axis Oz . The waveguide under study may have an arbitrary closed singly connected contour L of its cross section. Waveguide ...
  • Excitation and Propagation of a Fast Pulse Guided Wave in a Circular Dielectric Waveguide 
    Legenkiy, M.N.; Butrym, A.Yu. (Радиофизика и радиоастрономия, 2013)
    It is shown that a pulse signal in a circular dielectric waveguide is partitioned into slow and fast waves. The fast wave propagates along the dielectric surface with the speed of light in free space and creates a precursor ...
  • Experimental Ka-Band Ground-Based SAR System 
    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 ...
  • F-рассеяние как индикатор тропосферно-ионосферного взаимодействия 
    Зализовский, А.В.; Ямпольский, Ю.М. (2007)
    Исследованы тропосферно-ионосферные связи на примере эффекта ионосферного F-рассеяния. Рассматриваемые экспериментальные данные получены в 1993 - 2003 гг. на Украинской антарктической станции "Академик Вернадский" (до 6 ...
  • GaAs диоды Ганна с AlAs-GaAs-AlAs резонансно туннельным катодом 
    Стороженко, И.П.; Прохоров, Э.Д.; Боцула, О.В. (Радиофизика и радиоастрономия, 2006)
    На основе двухтемпературной модели междолинного переноса электронов в GaAs разработана методика исследования диодов Ганна с туннельной инжекцией электронов из катодного контакта. Изучены физические явления, связанные с ...
  • High Sensitivity 0.5 to 19.5 GHz Receiver with 1.1-GHz Instantaneous Bandwidth 
    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 ...
  • Impulse Source in the Vicinity of a Convex Impedance Body: Minimization of the Field in the Shadow Region 
    Zvyagintsev, A.A.; Ivanov, A.I.; Katkov, D.V. (Радиофизика и радиоастрономия, 2002)
    The work deals with the optimization problem of impulse source field minimization in the shadow region of a convex body with variable surface impedance. The optimal impedance is searched using uniform asymptotic methods ...
  • Low-Frequency Carbon Recombination Lines 
    Konovalenko, A.A.; Stepkin, S.V.; Shalunov, D.V. (Радиофизика и радиоастрономия, 2001)
    The low-frequency carbon recombination lines (with wavelengths up to twenty five and even more meters) became important means of the low-density interstellar plasma diagnostics. An impressive amount of astrophysical ...
  • Magnetron Transmitters for High-Resolution Radars 
    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 ...
  • Main Capabilities and Features of Ultra Wideband (UWB) Radars 
    Immoreev, I.J. (Радиофизика и радиоастрономия, 2002)
    This review paper discusses the differences between ultra wideband (UWB) radars and the conventional narrow-band radars. The features are shown of the generation, radiation and processing of UWB radar signals evoked by the ...
  • Mathematical Model of Spatial-Harmonic Magnetron with Cold Secondary-Emission Cathode 
    Schuenemann, K.; Sosnytskiy, S.V.; Vavriv, D.M. (Радиофизика и радиоастрономия, 2000)
  • Mathematical Simulation of Ultra Wideband Signals Scattered by Mines Buried in Ground. Algorithms of Mine Detection and Identification 
    Sukharevsky, O.I.; Zalevsky, G.S.; Muzychenko, A.V. (Радиофизика и радиоастрономия, 2002)
    Method of mathematical simulation of ultra wideband signals scattered by metal or dielectric mine and other subsurface objects located in ground or other medium is described. Method allows for getting electromagnetic signals ...
  • Microwave Reflectometry in Fusion Devices 
    Grekov, D.L. (Радиофизика и радиоастрономия, 2000)
  • Millimeter-Wave Radars for Environmental Studies 
    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 ...
  • Millimeter wave spectroscopy of the ground, first and second excited torsional states of acetone 
    Armieieva, I.A.; Ilyushin, V.V.; Alekseev, E.A.; Dorovskaya, O.A.; Margulès, L.; Motiyenko, R.A. (Радиофизика и радиоастрономия, 2016)
    Purpose: spectrum investigation of the lowest three torsional states of acetone ( CH₃COCH₃ ) within the frequency ranges 34–150 and 480–620 GHz.
  • Modeling on “Alphabet” of Jovian S-Bursts 
    Arkhipov, A.V. (Радиофизика и радиоастрономия, 2002)
    It is shown that the typical elements of complex S-bursts in dynamic spectra of Jovian decametric radio emission ("alphabet") could be explained by propagation delay of radiation due to helicoidal trajectory of S-emitter.
  • Modification of the Gelfand-Levitan Method for 1-D Multylaered Structure Inverse Problem 
    Drobakhin, O.O.; Andreev, M.V.; Novomlinov, A.; Korotkaya, V.; Sazonov, A.Z. (Радиофизика и радиоастрономия, 2002)
    For dielectric slab with step profile of dielectric constant the Gelfand-Levitan method is correct if peaks of time-domain reflected signal are close to δ-pulses. Combination of parametric spectral methods for obtaining ...
  • Multielement Linear Interferometers with One Remote Element 
    Kopilovich, L.E. (Радиофизика и радиоастрономия, 2005)
    New schemes of constructing multielement linear interferometers based on the difference sets are suggested. It is shown that adding a remote element to the earlier model [3] allows to extend a completely covered spatial-frequency ...

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