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Перегляд Радиофизика и радиоастрономия за назвою

Репозиторій DSpace/Manakin

Перегляд Радиофизика и радиоастрономия за назвою

Сортувати за: Порядок: Результатів:

  • About Radiation of Short Pulses by Wire Antenna of Finite Length 
    Gorobets, N.N.; Dumin, A.N.; Dumina, O.A. (Радиофизика и радиоастрономия, 2002)
    The problem of short pulse radiation by the wire antenna of finite length is considered in time domain. Physical peculiarities of the change of a pulse form in all space of observation are investigated without any limitation ...
  • Accelerated Algorithm of Least-Sguares Approximation of Signals by Exponentials for Wideband Frequency-Domain Reflectometry 
    Andreev, M.V.; Drobakhin, O.O.; Demyantchuk, K.A. (Радиофизика и радиоастрономия, 2002)
    In the paper the possibility of acceleration of procedure of best least-squares approximation of signals by exponentials was considered. For this purpose the analytical expressions for components of gradient vector and ...
  • Adelic quantum cosmology 
    Dragovich, B.; Nesic, Lj. (Радиофизика и радиоастрономия, 2001)
  • Analysis of Tridiagonal Recurrence Relations in Continuum Approximation 
    Bass, F.G.; Gitterman, M. (Радиофизика и радиоастрономия, 2001)
    Transition from difference to differential equation allows solving tridiagonal recurrence relations, which appear, among other things, in analysis of the rotation of an overdamped Brownian particle subjected to a periodic ...
  • Application of the Nanosecond Pulses 
    Krymsky, V.V. (Радиофизика и радиоастрономия, 2002)
    In operation two usages of short impulses are considered: a radiolocation and physical chemistry. The features of the characteristics of units of an impulse locator are reduced. Its high noise immunity is marked. The ...
  • Array Antennas of Size 8×8 Based on Hadamard Difference Sets 
    Kopilovich, L.E. (2008)
    The problem of synthesizing the optimized equi-amplitude array antenna (AA) on the 8×8 grid based on a Hadamard difference set is considered. By using newly found sets of this type on the 8×8 grid the 28- and 36-element ...
  • Behind the Zone of Avoidance of the Milky Way: What Can We Restore by Direct and Indirect Methods? 
    Vavilova, I.B.; Elyiv, A.A.; Vasylenko, M.Yu. (Радиофизика и радиоастрономия, 2018)
    Purpose: to present a brief overview of methods for restoring the large-scale structure of the Universe behind the Zone of Avoidance (ZoA) of the Milky Way; to propose a new “algorithm of darning the ZoA” and new approach ...
  • Clinotron: a Promising Source for THz Regions 
    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 ...
  • Cost-Effective Airborne SAR 
    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 ...
  • Dealiasing Doppler Spectra in Meteorological Radars 
    Sosnytskiy, S.V. (Радиофизика и радиоастрономия, 2012)
    A method of dealiasing of Doppler spectra is proposed. The method is based on the fact that overlaid spectral components of the received signals are statistically independent, and that there is no overlay in range. For ...
  • Decameter pulsar/transient survey of northen sky. First results 
    Vasylieva, I.Y.; Zakharenko, V.V.; Konovalenko, A.A.; Zarka, P.; Ulyanov, O.M.; Shevtsova, A.I.; Skoryk, A.O. (Радиофизика и радиоастрономия, 2014)
    The decameter pulsar/transient survey is now being made using the UTR-2 radio telescope. The survey strategy and parameters, equipment characteristics, data processing algorithms as well as preliminary results are described. ...
  • Detection of ultrawideband radar signals scattered from complex targets 
    Immoreev, I.J.; Fedotov, D.V. (Радиофизика и радиоастрономия, 2002)
    The questions of detection of radar-tracking signals are discussed, which parameters are unknown. The method for detection of radar signals which parameters are unknown is considered. The method is based on correlation ...
  • Diffraction of Modulated Electromagnetic Impulses on Periodical Grating 
    Gavrilova, T.V.; Sidorenko, Yu.B. (Радиофизика и радиоастрономия, 2002)
    The problem of diffraction of amplitude-modulated impulses with linear frequency modulation on the planar periodical grating consisting of infinitely thin and ideally conducting strips has been considered. The ability to ...
  • Dispersive Effect Correction for Ultra-Short Impulse Signals Using Joint Time-Frequency Transforms 
    Deng, H. (Радиофизика и радиоастрономия, 2002)
    The Joint Time-Frequency Transforms (JTFT) are employed to identify the time-frequency distribution of dispersed ultra short impulse signals transmitted through unknown propagation channels in the presence of noise. The ...
  • Earth – Atmosphere – Geospace as an Open Nonlinear Dynamical System 
    Chernogor, L.F.; Rozumenko, V.T. (2008)
    The concept of the Earth-atmosphere-ionosphere-magnetosphere (EAIM) system as a complex open dissipative nonlinear dynamical system whose most important property is trigger mechanisms for energy releases has been validated, ...
  • Effect of Ultra-Short Pulse Signals on Information System Survivability 
    Serkov, A.A. (Радиофизика и радиоастрономия, 2002)
    Here, the problems dealt with a survivability simulation of information systems under destabilizing electromagnetic effect have been considered. Proposed was the graph-analytic model of the information system and the ...
  • Electrodynamic Characteristics of Multilayered System of Plane Screens with a Slot 
    Kaliberda, M.E.; Lytvynenko, L.M.; Pogarsky, S.A. (Радиофизика и радиоастрономия, 2011)
    The diffraction by a finite and semi-infinite system of plane screens with a slot is considered. The problem is solved with the operator approach. The possibility of screens shift in the plane of their displacement is ...
  • Electromagnetic Characteristics of the Simplest Strip System 
    Koshovy, G.I. (Радиофизика и радиоастрономия, 2003)
    The main electromagnetic characteristics of the noncoplanar system of two narrow strips with parallel edges are investigated. They are determined on the basis of the integral equation technique, using the local coordinate ...
  • Empirical Estimate for the Element Number of a Nonredundant Configuration on a Hexagonal Telescope Aperture 
    Kopilovich, L.E. (Радиофизика и радиоастрономия, 2006)
    The empirical upper estimate is obtained for the number of elements of a nonredundant configuration on a given size hexagonal telescope aperture. Nonredundancy means that all the differences between vector radii of the ...
  • Empirical Estimate for the Maximum Element Number of a Nonredundant Configuration on Square Array Antenna 
    Kopilovich, L.E. (2009)
    The maximum number of elements of a nonredundant configuration on a square array antenna is estimated empirically employing the investigated structure of differences between the elements of the configuration mapping onto the scan.

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