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Перегляд Радиофизика и радиоастрономия, 2002, № 4 за датою випуску

Репозиторій DSpace/Manakin

Перегляд Радиофизика и радиоастрономия, 2002, № 4 за датою випуску

Сортувати за: Порядок: Результатів:

  • 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 ...
  • The Sampler of the Videopulse Georadar 
    Kholod, P.V.; Ruban, V.P. (Радиофизика и радиоастрономия, 2002)
    The given work is devoted to the theoretical analysis of noise characteristics and distortions of the sampler with the bandwidth 1 GHz and sensitivity 1 mV made according to the bridge diode circuit. The results of test ...
  • Reflection of the Ultra-Wideband Signals from Plasma Layers 
    Chernogor, L.F.; Lazorenko, O.V. (Радиофизика и радиоастрономия, 2002)
    This paper is concerned with the temporal distortion caused by the dispersion of ultra-wideband signals reflecting from linear and parabolic plasma layers. The magnitudes of the expected effects have been estimated for the ...
  • Pulse Scattering on Objects in the Inhomogeneous Conducting Medium 
    Varyaniza-Roshchupkina, L.A.; Kovalenko, V.O. (Радиофизика и радиоастрономия, 2002)
    The objective of the work is to present the results of computer simulation of the problem of pulse scattering on cylinder objects buried in the inhomogeneous conducting medium. The finite difference time domain method ...
  • New IEC Standards Requirements to the Parameters of Powerful Electromagnetic Pulsed Disturbances 
    Kravchenko, V.I.; Knyazyev, V.V.; Koliushko, G.M.; Vavriv, L.V. (Радиофизика и радиоастрономия, 2002)
    The European Union Directive on EMC defines a new concept of providing electromagnetic compatibility. The Directive mandates that all electromagnetic phenomena which can influence the operation of technical devices need ...
  • Ultra-Short Pulse Excitation in a Semi-Infinite Waveguide by a Relativistic Electron Bunch 
    Balakirev, V.A.; Onishchenko, I.N.; Sidorenko, D.Yu.; Sotnikov, G.V. (Радиофизика и радиоастрономия, 2002)
    The theoretical investigations and simulation are performed for the emission of a relativistic electron bunch during the injection into a semi-infinite vacuum/dielectric waveguide. The exact solution of the problem is ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Ultra-Wideband Communication System with High Data Rate 
    Immoreev, I.J.; Sudakov, A.A. (Радиофизика и радиоастрономия, 2002)
    The ultra-wideband communication system with high data rate is considered. Information in the system is transmitted by train of short pulses, which have duration about 1.0 ns. The hardware realization of the system is ...
  • Wavelet Analysis and Ultra Wideband Signals 
    Chernogor, L.F.; Lazorenko, O.V.; Lazorenko, S.V. (Радиофизика и радиоастрономия, 2002)
    The wavelet analysis is offered to be used for the description of the ultra wideband signals. The expediency of such approach is justified. It is displayed, that wavelets are ultra wideband signals. The wideband indexes ...
  • 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 ...
  • Some Aspects Concerning the Designing of Ultrawideband and Pulse Antennas 
    Titov, A.N. (Радиофизика и радиоастрономия, 2002)
    The principally attainable antenna characteristics are discussed, including the ultrawideband antennas. Antenna configuration is pointed out as a principle factor for the antenna characteristics to approach the potentially ...

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