COMPACT PATCH ANTENNA FOR MICROWAVE RANGE
The paper proposes to expand the range of your wireless network to use a small patch antenna using directional properties. The description of the antenna design are described and the principle of its operation, set its frequency and gain. The calculation range of the wireless network with the designed antenna. This graphic of the cross section of the radiation pattern in the horizontal plane, the spatial radiation pattern, based on the values of standing wave ratio against frequency. Designed antenna allows you to ensure the radio range of standard Wi-Fi line-of-sight at a distance of more than 1500 m, has a fairly wide beamwidth and high gain.
Keywords: patch antenna, wave propagation, data transmission, wireless communication.
MODELING OF ELECTROMAGNETIC WAVES PROPAGATION IN THE COMMUNICATION CHANNEL WITH ATTENUATION
D.G. Panarin, A.V.Danilova
In this paper, the problems associated with the propagation of radio signals in wireless communication systems for rural and urban routes. The main causes of losses. The basic drawbacks of the approaches proposed Okamurai and Hut. It is proposed to use model plane-environment to understand the implications of land cover on the track. Expressions are given for the coefficients of reflection and transmission. Used born of scattering of electromagnetic waves on the element of vegetation, the calculation of the scattered field was based on the method of moments solution of integral equations. A comparison of the wave amplitudes obtained on the basis of 2 methods – Rayleigh scattering and the method of moments.
Keywords: wave propagation, telecommunication, method of moments, the disturbance attenuation.
CHARACTERISTICS OF MATHEMATICAL SOFTWARE RADIO COMMUNICATION
T.V. Glotova, H.I.Besher
This paper discusses the features of the methods used to assess the propagation characteristics of radio waves in modern radio systems. Parameters affecting the accuracy and the computation time of radio signal propagation in certain areas. It is noted, as a preliminary evaluation of the characteristics as there is a large error in calculations, the use of statistical approaches. More acceptable from the point of view of practical use give radiation methods, different variants of which is given. It is noted the feasibility of a combination of several methods, such as adding to the main model approaches based on artificial intelligence.
Keywords: radio communications, wave propagation, mathematical software, method, design.
THE SIMULATION OF SCATTERING CHARACTERISTICS OF OBJECTS HAVING EDGES
A. P. Preobrazhensky
In the paper the problems of scattering of radio waves on the objects, which include edge are considered. First, the analysis of the simplest edges, which is a wedge-shaped structure having a certain angle of solution is given. For the general case the edge of such structures may be truncated. The calculations of the scattering parameters was based on the method of integral equations in the framework of the Kirchhoff approximation. The examples of calculations of scattering characteristics are given, and built the radio image. Further the models of hollow structures is considered. The edges of these hollow structures can be defined by different edges. The calculations of the scattering parameters was based on the method of integral equations. The examples of calculations of scattering characteristics of hollow structures, and built the radio image of the edge part of the hollow structure.
Keywords: simulation, communication, diffraction, wave propagation, design, edge, hollow structure.
THE SIMULATION OF RADIO WAVE PROPAGATION INDOORS
P. S. Ryzhenin
The analysis of such methods, based on which we can assess the level of electromagnetic fields inside premises. It is shown that on the basis of the deterministic methods achieve a higher accuracy of calculations of scattering characteristics of radio waves, when compared with statistical approaches. Occurs building the tree of beam propagation, while fundamentally we see the beam coming from the transmitting device and each point of reflection or diffraction are generated by the additional rays. When multipath propagation of the signal we are seeing some of the most significant effects: fading, time dispersion, the angular modulated carrier. The model rectangular space, which is calculated in the framework of the ray method.
Keywords: ray method, wave propagation, wireless communication, computer networks, antenna.
THE POSSIBILITY OF USING ITERATIVE METHOD FOR THE CALCULATIONS OF SCATTERING CHARACTERISTICS OF COMBINED OBJECTS
A. G. Yurochkin, A.V.Danilova, I.A.Gusarova
This paper considers the scattering of radio waves on the combined object consisting of several components. One of the possible ways, which is analyzed by the application of the method of integral equations. But with a large size of circuits and an increase in the number of components the time required for calculations increases significantly. In this regard, the iterative method is considered, which takes into account only the currents that are related directly to the reflection between components, which leads to a reduction in the size of the matrix of linear equations and an overall reduction in the computation time. Given an example, when as a combined object is a combination of two-dimensional elliptic cylinders. Characteristic size at which the iterative method works well.
Keywords: communication, diffraction, wave propagation, method of integral equations, iteration, cylinder.
THE ANALYSIS OF APPROXIMATE MODELS FOR ESTIMATING THE AVERAGE CHARACTERISTICS OF THE SCATTERING DIFFRACTIVE STRUCTURE
A. G. Yurochkin, A.V.Danilova, I.A.Gusarova
This paper analyses the possibilities of how to apply the approximate model in order to assess the average characteristics of the scattering object. The exact approach is based on the method of integral equations, and an approximate model based on the combination of the method of edge waves and the physical optics approximation. The object is represented in the form of separate components. It is shown how the defined sector angles, given the framework of specific errors. Based on how aggregated information on the elements of an object given suggestions on how to build a subsystem of CAD in order to design the average characteristics of the objects. As a test data for the subsystem are selected dimensions of the elements and sector angles, the required levels for the average characteristics of the scattering.
Keywords: communication, diffraction, wave propagation, design, CAD, diffraction structure.
THE METHODS OF OPERATION OF THE ELECTROMAGNETIC ENVIRONMENT INDOOR
In this paper we discuss the issues related to the propagation of electromagnetic waves inside buildings. The basic types of reflectors are corner reflectors, reflectors that affect the scattered signals. List the types of screens, for which at the moment can be made a reasonable estimate of the scattered fields.
Keywords: wave propagation, room, environment, screen.