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Перегляд Радиофизика и радиоастрономия, 2002, № 4 за назвою

Репозиторій DSpace/Manakin

Перегляд Радиофизика и радиоастрономия, 2002, № 4 за назвою

Сортувати за: Порядок: Результатів:

  • 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 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 ...
  • 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 ...
  • 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 ...
  • On the Basic Concepts of UWB Radar Scan 
    Astanin, L.Yu.; Kostylev, A.A.; Fliorova, A.A. (Радиофизика и радиоастрономия, 2002)
    In this paper, the terms in wide use, the Ultra Wideband (UWB) signal and the Ultra Shot Impulse (USI), are discussed. Their usage conditions are considered and the difference in meanings is determined. As main tool for ...
  • Propagation of Short Electromagnetic Pulses through Nonconducting Media with Electric and Magnetic Dipole Currents 
    Harmuth, H.F.; Lukin, K.A. (Радиофизика и радиоастрономия, 2002)
    Propagation of electromagnetic signals through a non-conducting medium with very low density of neutral gas is considered with taking into account both electric and magnetic dipole currents. A new approach based on microscopic ...
  • Propagation of Short Pulses in Plasma Half-Space (Ionosphere) 
    Gutman, A.L. (Радиофизика и радиоастрономия, 2002)
    The exact solution of the problem in the half-space of non-homogeneous plasma is obtained, and an asymptotic method for the same task as well. The estimations of the non-linearity and the electron-atom collisions influence ...
  • 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 ...
  • Radar Range Equation for Ultra Wideband Signals and Ultra Short Pulses 
    Avdeev, V.B. (Радиофизика и радиоастрономия, 2002)
    The range equation for radiolocation of an object and its elements with ultrawideband signals (UWBS) and ultra short pulses (USP) are resulted. The criticism of other published equations is given.
  • Radiation of Ultra-Wideband (UWB) Signals 
    Immoreev, I.J.; Sinyavin, A.N. (Радиофизика и радиоастрономия, 2002)
    The radiation of short duration signals (or ultra-wideband – UWB signals) is significantly different from the long duration narrowband signals (see Table 1 below). Paper analyzed the processes in linear antennas and gives ...
  • 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 ...
  • 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 ...
  • Structure and Application of ATDP Suite for Electronic System States Detection and Evolution Operator Restoration 
    Magda, I.I.; Paschenko, A.V.; Shapova, l I.M.; Novikov, V.E. (Радиофизика и радиоастрономия, 2002)
    Structure and peculiarities of the Adaptive Testing Data Processing software Suite (ATDP Suite) are presented. It is applied for dynamic characteristics restoration from experimental time series of nonlinear and unstable ...
  • Symmetry in Single-Polarization Reflector Impulse Radiating Antennas 
    Baum, C.E. (Радиофизика и радиоастрономия, 2002)
    There are various construction details for reflector impulse-radiating antennas (IRAs) which limit the achievement of the ideal performance characteristics. Symmetry planes are important for polarization purity in the ...
  • The Definition of the Time-Space and Power Performances of the Ultrawideband Antennas 
    Zamyatin, V.I.; Yermakov, G.V. (Радиофизика и радиоастрономия, 2002)
    The definitions of the time-space, frequency−space and power characteristics of the ultrawideband antenna systems permitting to evaluate from unified positions the overall performance of different function videopulse ...
  • The Experiments on Radiation of Short Pulse Signals by the Large Current Radiators of Dr. H. F. Harmuth 
    Pochanin, G.P.; Pochanina, I.E.; Kholod, P.V.; Masalov, S.O. (Радиофизика и радиоастрономия, 2002)
    The report contains some designs and characteristics of studied by the author large current radiators (LCR) of Dr. H.F. Harmuth for radiation of pulse signals of the nanosecond duration range.
  • 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 ...
  • Time-Domain Modeling of Short Pulses Radiation with Aperture Decomposition Method 
    Butrym, A.Yu.; Katrich, V.A.; Kazanskiy, V.B.; Kolchigin, N.N.; Pivnenko, S.N. (Радиофизика и радиоастрономия, 2002)
    This paper is dealt with a general modeling method for Time Domain analysis of aperture antenna pulse radiation. Non-synchronous excitation is the main feature of the proposed approach. We solve in a closed-form the problem ...
  • Transient Electromagnetic Wave Scattering from Dispersive Anisotropic Layered Medium 
    Malyuskin, A.V.; Shulga, S.N. (Радиофизика и радиоастрономия, 2002)
    Transient electromagnetic (EM) wave scattering from a stratified anisotropic medium with temporal and spatial dispersion is considered. The dispersive anisotropic medium is modeled by constitutive relations that involve ...

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