THE TECHNIQUE OF CALCULATION THE PARAMETERS OF THE ELECTROMAGNETIC THE FIELDS SCATTERED BY THE BODY WITH COMPLEX FORM IN THE NEAR ZONE
The paper is based on the methodology that uses the representation of an object of complex shape as a set of facets, we investigate the characteristics of scattered by this object in its near zone. It is shown how, using the calculated data to explore the effect of the spatial configuration of the field on the accuracy of measurement of angular coordinates of the object. The calculated dependence of the relative field amplitude of the object and the plate from the corner for the near zone to the far zone. The graphical analysis of the dependencies shows that in addition to monotonic attenuation length fields exist oscillating damped oscillations. It is believed that the antenna is moved around the object at random are averaged over all viewing angles characteristics of the scattered field. After calculating the parameters of the distribution law of a random variable from section to section, we can conclude about how changing the process in time. The analysis demonstrates that when we move from the far zone to the near, there is a shift of peak values of amplitudes and is an extension of the main lobe of the secondary radiation. The histograms of the distributions of amplitudes and phases of a complex object, after analysis it was found that the distribution of instantaneous values of the amplitudes of the scattered field by the object is described by Rayleigh. If we consider the distribution of the instantaneous phase of the scattered field, the shape of the histogram is close in form to the histogram of a uniform law. The analysis of the results allows to assert that the regularities of the distribution of values of amplitudes and phases of the scattered field related to the far and near zones will be the same.
Keywords: complex object, electromagnetic wave, near zone, scattering, diffraction.
THE APPLICATION OF OPTIMIZATION METHODS FOR THE DESIGN OF
ABSORBERS OF ELECTROMAGNETIC WAVES
The paper deals with the use of multi-objective optimization particle swarm optimization for designing of planar multilayered electromagnetic absorbers in the determination of Pareto-optimal solution. During optimal solution presents we determined the compromises between the thickness and reflection coefficient of the absorbers. The developed algorithm for synthesis of absorbing material is simple and quite fast.
Keywords: optimization, modeling, absorbent material, design, electromagnetic wave.
THE METHODS FOR SOLVING PROBLEMS OF SCATTERING OF ELECTROMAGNETIC WAVES ON A HOLLOW STRUCTURES
The methods that can be used for the estimation of characteristics is the scattering of electromagnetic waves on a hollow structures are discussed. Their features are indicated.
Keywords: electromagnetic wave, hollow structure, algorithm, scattering.
THE PROBLEMS OF CONTROL LEVEL OF SCATTERED ELECTROMAGNETIC FIELD
The paper discusses the problem of scattering of electromagnetic waves on a hollow structures. The proposals are given to the management of scattered electromagnetic field due to selection of the size of the object.
Keywords: hollow structure, integral equation, scattering, electromagnetic wave.
ABOUT THE USING OF INTEGRAL EQUATIONS IN THE SOLUTION OF ELECTRODYNAMIC PROBLEMS
The analysis of characteristics of integral equations is carried out. The possible methods of their solution. the methods is considered. The possibility of using integral equations is indicated in the solution of electrodynamic problems.
Keywords: integral equations, electromagnetic wave, scattering.
THE FEATURES OF PROCESSING OF RADIO IMAGES
The analysis of the problems encountered when processing images is given. The role of fractals in the consideration of a complex of radar signals is stressed.
Keywords: radio image, algorithm, electromagnetic wave.
ABOUT THE PROBLEM OF SCATTERING OF ELECTROMAGNETIC WAVES ON THE BODY WITH MAGNETO-DIELECTRIC COATING
A.A. Golovin, Y.A.Mishin
The paper discusses the issues associated with the scattering of electromagnetic waves on the body with magneto-dielectric coating.
Keywords: electromagnetic wave, scattering, absorption.
THE SOLUTION OF THE PROBLEM OF SCATTERING OF ELECTROMAGNETIC WAVES ON THE METAL CYLINDER IN THE EARTH COVER
The scatters of electromagnetic waves that are in the dielectric environment have broad practical application. For example, when modeling the scattering of electromagnetic waves on cylindrical object in an earth cover we can use these results at remote sensing of pipes and cables. In paper some results within the considered model are received.
Keywords: : scattering of waves, integral equations, electromagnetic wave.
THE POSSIBILITY OF USE OF THE ABSORBING MATERIALS FOR REDUCTION OF INFLUENCE OF RADIATION OF MOBILE PHONES BY THE BRAIN OF PEOPLE
The problems connected with use by people of means of mobile communication – phones are noted. The simplest mathematical model of phone is considered and on the basis of a method of final elements the assessment of extent of attenuation of power of an electromagnetic wave when using material with certain characteristics for formation of a back wall of phone is carried out.
Keywords: : mobile communication, electromagnetic wave, method of final elements.
THE APPROACHES FOR ESTIMATION OF SCATTERING CHARACTERISTICS OF ELECTROMAGNETIC WAVES
A.V. Danilova, A.G.Yurochkin
The paper is devoted to the analysis of approaches within which carry out an estimation of scattering characteristics of electromagnetic waves. The features of practical use of approaches depending on a form of the studied objects, their sizes in relation to wavelength are noted.
Keywords: : scattering of waves, integral equations, electromagnetic wave, Maxwells equations.