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The possibility of obtaining hydrogen storage materials based on TiCr2 intermetallic compounds by the methods of melting in abnormal glow discharge plasma and electron beam melting is shown. The use of melting in abnormal glow discharge plasma leads to the formation of a Laves phase of the C36 structural type, while electron beam melting allows the C14-type Laves phase to be obtained. It is established...
The paper presents a high-rate method for metal coating deposition by the means of magnetron sputtering system (MSS) with liquid-phase target. Maximum copper deposition rate at a power density of 55 W/cm2 is 200 nm/s, which is twenty times higher than if an ordinary magnetron is used. The effect of material of the crucible on operation of MSS with liquid-phase target and copper coating deposition...
The Green's functions of layered structures are used for the reflection and transmission analysis from antenna radomes. The incident wave is associated with equivalent surface electric and magnetic currents on the illuminated side of the ra-dome. Reflecting and transmitting fields are calculated as the radiation of equivalent currents. Stratified structure is modeled with equivalent circuit approach...
A Leaky-wave antenna based on a rectangular waveguide with partially dielectric filling and transverse slots is investigated. The Green's function method for dispersion equations and antenna radiation analysis is suggested. A protective dielectric cover on the screen with slots is taken into account. The complex propagation constant is defined by matching of magnetic field in slots. Two different...
The method of Green's functions of layered cylindrical magnetodielectric structures with arbitrary extraneous electric and magnetic currents using an equivalent lines approach is briefly described. Transmitting matrices and different kind of loads are used for a layered structure and space boundaries modelling. Equivalent voltages and currents in a modelled circuit are associated with spectral field...
J. A. Stratton and L. J. Chu were the first scientists who solved an antenna problem with radiation of a ring slot on a conducting sphere [1]. It was almost seventy years ago. There were some inconveniences in that solution. Firstly, the slot width was not taken into consideration so a reactive part of radiation admittance was not defined. Secondly, the mechanism of a slot excitation was not studied...
Spectral-domain full-wave approach for cylindrical radially non-uniform structures based on the matrix technique is described. Scattering properties of a circular conducting cylinder coated with a layered material are investigated analytically. The behavior of the scattered field in the far zone is illustrated with numerical results for different coating material types including materials with negative...
The Green's functions of grounded magnetodielectric slabs using the alternative wave expansion with LE, LM waves are suggested. Radiation patterns of surface waves excited by a patch dipole and a slot covered with double-positive and double- negative permittivity and permeability media are obtained and compared. The space wave radiation efficiency for a patch dipole and a slot are calculated.
Linear and circular polarized waves scattering on spherical homogeneous and layered bodies with negative refraction index are studied. The wave excitation and diffraction analysis is based on a new universal representation of Green's tensors for composite spherical bodies. Scattering waves' behaviour is analyzed.
Linear and circular polarized waves scattering on spherical homogeneous and layered bodies with negative refraction index are studied. The wave excitation and diffraction analysis is based on a new universal representation of Green's tensors for composite spherical bodies. Scattering waves' behaviour is analyzed.
The Green's functions of grounded magnetodielectric slabs with LE, LM waves' expansion and layered circular cylinder with E, H waves' expansion are used for surface and space waves analysis. Traditional magnetodielectrics and double negative materials are under consideration. Radiation patterns of surface waves excited by a slot covered with double-positive and double-negative permittivity and permeability...
Two antenna arrays with linear and circular polarization for meteorological radiosonde tracking radar are compared and discussed. The 26 dB gain antenna operates in 1.765-1.795 GHz range. Both arrays consist of four subarrays. Each subarray comprises suspended rectangular patch antennas fed by air filled strip lines. The 4 element array incorporated into the center of the big array forms wide beam...
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