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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:

  • 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 ...
  • 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 ...
  • 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 ...
  • 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 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 ...
  • 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 ...
  • 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 ...
  • Ultra Wideband Dipole Antenna 
    Bakhrakh, L.D.; Los', V.F.; Shamanov, A.N. (Радиофизика и радиоастрономия, 2002)
    This paper considers the antenna-feeder device which helps to realize a new method of antenna excitation. This method enables to transfer dipole antennas into the ultra-wideband category. The paper also demonstrates the ...
  • 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 ...
  • 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.
  • Using Alternative Aperture Geometry Horn Antennas in Wide-Band Multifrequency Measurements 
    Drobakhin, O.O.; Kondratyev, Y.V. (Радиофизика и радиоастрономия, 2002)
    Application of horn antennas in non-destructive testing by multifrequency reflectivity measurements has several advantages in comparison with simple antennas such as open-ended waveguide, in particular, higher gain and ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Ultra-Wideband (UWB) Radar for the Remote Measuring of Main Parameters of Patient's Vital Activity 
    Immoreev, I.J.; Samkov, S.V. (Радиофизика и радиоастрономия, 2002)
    The capability of UWB radar usage in medicine the for remote measuring of patient’s heart activity and respiration is considered. The measuring method is described and practical results of the tests are cited. The possibility ...
  • 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 ...
  • 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 ...
  • 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.

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