Vol 19, No 3 (2016)
- Year: 2016
- Articles: 12
- URL: https://journals.ssau.ru/pwp/issue/view/377
Articles
Experimental reserch of TEM-horn antenna with inhomogeneous dielectric
Abstract
There proposed a technique for improving linear TEM-horn antenna directivity and matching by filling its inner space with inhomogeneous dielectric medium. The exact shape of the medium permittivity’s spatial distribution was chosen from an assumption of the whole wavefront being a result of straight-line emission from a lumped phase center. The Lichtenecker’s formula for two-phase composite material was used to approximate permittivity’s smooth transitions with a complex punched structure of a solid dielectric. This punched structure was manufactured using a 3D-printer, and its impact on antenna’s quality characteristics was experimentally measured.
6-11
The solution to the problem of microwave heating of composite materials
Abstract
This paper considers the problem of microwave heating of polymers, asphalt-paraffin deposits when filling metal, short-circuited cylinder. The problem of formation and optimization of electromagnetic fields. The results of simulation of excitation of a cylinder with the use of maximum and integral criteria.
12-16
Microwave photonic crystals - a new type of functional structures in radioelectronics
Abstract
The results of new practical applications of microwave photonic crystals as functional radioelectronic structures, including microwave filters based on the system of resonance diaphragms and small-sized wideband matched loads in the centimeter and millimeter wavelength ranges are presented.
17-24
Self-consistent boundary-value problem for the adjoint Helmholtz equation
Abstract
The self-consistent boundary-value problem of excitation is considered. In that problem the source function standing on the right side of Helmholtz equation is a solution of the homogeneous boundary value problem for this equation. It is shown that such a source along with our own wave (oscillation) creates an attached wave (oscillation). Since these waves (vibrations) exist only in the presence of a source of a designated type, it is proposed to classify them as connected to the supply.
25-29
Shear waves in a circular gap structure of piezoelectric crystals with rotating cylinder
Abstract
The circumferential propagation of shear-axial waves in a circular gap structure of 6mm(4mm)-class symmetry piezoelectric crystals with rotating piezoelectric cylinder are considered. Generally the curvature of gap boundaries leads to attenuation waves due to radiation in environment. It is shown that with excess of gap wave phase velocity to linear velocity of surface of rotating cylinder the stationary propagation of gap waves is possible.
30-32
The colors in television and method of reduction
Abstract
Shows the sources of color distortions in the body-color vision, and that the chromaticity coordinates, which are located inside the triangle color gamut screen television may play colorimetricheski exactly, i. e. without color distortion. We propose a method for implementing a television system with a colorimetriction accurately reproduced color images.
33-39
Fractional Laplasians and propagation of waves in three-dimensional space as quantum process
Abstract
In this paper it is shown that in the whole range of problems of waves propagation there is hidden feynmanon. We call by ‘feynmanon’ the quantum object moving along fractal trajectories in phase space of dynamical system related with wave equation considered by means of Feynman integral. Methodology of introduction of feynmanons is quite general and is closely connected with nonlocality of fractional Laplasians.
40-44
Comparative assessment of methods for the analysis of open dielectric waveguides with arbitrary cross section
Abstract
Comparative assessment of methods for the analysis of open dielectric waveguides is presented. It is noted that only in the case of open dielectric waveguides with cylindrical coaxial layers formulation of the boundary value problem in closed form is possible. It is shown that the spectral method, which uses the autonomous decomposition of the components of the field, allows for a rigorous calculation of the open dielectric waveguides of any cross section.
45-48
Solving problems of electrodynamics on the basis singular integral presentations of the electromagnetic field: antennas theory, the diffraction of electromagnetic waves, metastructures
Abstract
The problems concerning the use of the singular integral representations of the electromagnetic field for the construction of self-sufficient mathematical models and re-radiating structures. The foundations of a correct analysis of the electrodynamic antenna elements and chiral metamaterials. The mechanism accounting interelemental interaction, which is realized through the process of generalized Gauss-Seidel method. The results of the numerical solution of internal and external problems for some antenna models reemitting elements and metastructures.
49-59
Preservation of species and conditions of evolution
Abstract
Distinction of two opposite directed the time processes is considered: preservations of species and evolutions. On the basis of Hardy - Weinberg law the analysis of the reasons of the species preservation is submitted. With the help of a Green’s function for a population it is shown that at mutational influence on a population there is a disappearance of a mutational influence result for 4 - 5 generations. Evolutionary process occurs at infringement of the Hardy - Weinberg law due to a dot mutation of the different sex descendants of one female individual. Conditions at which occurrence of a new species is possible are submitted.
60-64
Problem retransmission of signals from antenna devices of the carrier rocket «Soyuz-2» and block launch «Volga» during ground tests of radio engineering systems at the launch complex of the spaceport «East»
Abstract
The article deals with the problem of data transmission radio systems launcher and launch unit through a passive relaying antenna-feeder device. The calculation of the radio and experimental study of the effect of the mobile service tower at the screening level of radiation antennas LV and BV. A principle of the signal relay circuit antenna devices at Rs trials with the antenna tips.
65-69
Broadband shunting structures and their using when designing microwave devices
Abstract
The microwave devices structured syntheses with use shunting quadrupoles is considered in given to article. The Theorem about cascade cut-in reactive symmetrical quadrupoles happens to here. The examples different microwave devices are brought in given to article.
70-77
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