Tag Archives: scattering of radio waves

THE MODELING OF COMPLEX ANTENNA DEVICES ON THE BASIS OF THE APPARATUS OF THE GENERALIZED SCATTERING MATRIX

UDC 621.396

Y. Shtefanovich, Y. S. Sakharov

Currently, the active development of the telecommunication facilities, used by an increasing number of transmitting and receiving devices can be observed. Between nearby objects in space (antennas, metal-dielectric structures) occurs electrodynamic interactions that affect their work. This paper aims to develop methods for the assessment of the characteristics of this interaction. A leading approach to the study of this problem is the use of a method based on generalized scattering matrix. Knowledge of the generalized scattering matrix provides the possibility for calculations of the characteristics of the antenna system, without considering the geometry. By analogy with the use of matrices of two-and multiprobe used in electrical circuits, generalized scattering matrix is carried out to minimize the calculations for the analysis of complex antenna systems. The paper presents the results of modeling of the interaction loop antenna ball, which is formed of a dielectric material. The dispersion characteristics were calculated based on the method of integral equations. On the basis of calculations of the electrodynamic interaction between objects is possible to estimate the influence of the position of the antennas on the level of measured electromagnetic fields. The materials of the article are of practical value to professionals associated with the design of wireless networks indoors.

Keywords: telecommunication, simulation, scattering of radio waves, scattering matrix, antenna.

Full text:
ShtefanovichSakharov_4_1_17.pdf

THE DEVELOPMENT OF A SUBSYSTEM OF CAD FOR THE ANALYSIS OF SCATTERING PROPERTIES OF OBJECTS WITH ABSORBING COATINGS BASED ON FACETED MODELS

UDC 621.396

Abbas Jassim Hussey, A. P. Preobrazhensky

This paper considers the problem of scattering of electromagnetic waves on the object, which is a plate coated with an absorptive coating. The system of integral equations was recorded, which allows us to associate a density potential, Green’s function and the incident electromagnetic wave. After solving the system of equations based on the method of moments were calculated values of the effective area of the dispersion under certain conditions of observation. Based on the view object, that use the facet model and gives suggestions for characteristics of a subsystem of CAD, in which you can carry out the design of objects with the required values for the levels of scattered electromagnetic fields were obtained. As input to this subsystem can be used the sizes of the facets, the sector angles, the required level for the characteristics of scattering of radio waves.

Keywords: scattering of radio waves, facet model, CAD, radar cross section, absorption of radio waves.

Full text:
AbbasPreobrazhensky_2_17_1.pdf

THE SIMULATION OF RADIO WAVE SCATTERING ON THE STRUCTURES WITH ABSORBING LAYER

UDC 621.396

E. V. Aleshkina

This paper describes the problem of scattering of radio waves in a complex diffraction structure having a cut absorptive coating on part of its surface. The system of integral equations in the framework of it contact density potentials, green function and the initial frequency was formed. Once solved the system of equations with the application of the relevant basis functions based on the method of moments was calculated values of the effective area of scattering at given conditions of observation. Suggestions were made on how to form a subsystem of CAD, which will provide opportunities to conduct designing of equipment with the necessary values of the scattering characteristics. As input to this subsystem, you can apply the scattering structure, the sector of observation angles, the required value of the level for the characteristics of scattering of radio waves.

Keywords: scattering of radio waves, absorption, modeling, integral equation.

Full text:
Aleshkina_1_17_1.pdf

THE SOLUTION OF THE PROBLEM OF SCATTERING OF ELECTROMAGNETIC WAVES IN MAGNETO-DIELECTRIC OBJECT BASED ON THE ADAPTIVE METHOD

UDC 621.396

T. V. Glotova, T.V.Melnikova

This paper discusses how adaptive integral method for solving the problem of scattering of electromagnetic waves on the object, which consists of several magneto-dielectric materials can be used. The integral equation to be solved with the help of this approach helps to eliminate resonance phenomena in dielectrics, and to obtain very accurate results. The method of moments is applied in order to carry out the process of discretization of integral equations is given and the resulting matrix system which is solved based on the iterative approach. As a result, the memory requirements is reduced to store intermediate results and to speed up matrix-vector multiplications. Numerical results that illustrate the accuracy and efficiency of this method are given.

Keywords: scattering of radio waves, method of moments, integral equation, magneto-dielectric materials, algorithm.

Full text:
GlotovaMelnikova_2_16_2.pdf

THE CHARACTERISTICS OF TWO-DIMENSIONAL PERIODIC COMBS WITH DIELECTRIC WAVEGUIDE

UDC 621.396

A. A. Maximova

The paper discusses the issues of diffraction of electromagnetic waves on reflective comb with double periodicity is covered by a dielectric layer. The algorithm, which is considered, based on the method of integral equations for the problem of determining the currents on the surface of the comb. The obtained result can be generalized to two-dimensional comb. According to the found current density distribution on the surface of the comb element can be determined of the scattered electromagnetic field.

Keywords: scattering of radio waves, diffraction, two-dimensional-periodic comb filters, dielectric waveguide.

Full text:
Maksimova_1_16_1.pdf

THE CONSTRUCTION OF COMBINED ALGORITHM FOR CAD DIFFRACTION STRUCTURES

UDC 621.396

I.V.Kryuchenko

The methods are analyzed, that enabling the analysis of scattering characteristics of objects of complex shape. The structure of subsystem of CAD, on the basis of which it is possible to process optimization and forecasting of the characteristics of interest is devloped.

Keywords: scattering of radio waves, optimization, forecasting, CAD.

Full text:
Kruchenko_2_14_1.pdf

THE CHARACTERISTICS OF PROTOCOLS IN MESH-NETS

UDC 621.396

A.P. Preobrazhensky

The paper deals with the design features of the diffraction objects in an example of hollow structures. The main characteristics that are important in practice are shown. The structure of the module for the design of hollow structures is given, its constituent components are described.

Keywords:  : CAD, hollow structure, characteristic, scattering of radio waves.

Full text:
Preobrazhensky_1_15_1.pdf