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Antenna Array


Antenna array

Complex directional antenna consists of separate near-omnidirectional antennas (radiating elements) positioned in the space and driven by high-frequency …

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In the paper, the solution method for the problem of electromagnetic waves scattering by cylinder bodies is given. The method is based on 2*pi-periodicity property of functions describing the parameters and distributions of fields and currents on cylinder bodies. The method advantage is the possibility ...
Modified: 03/26/2007
Tags: electromagnetic wave , field , current
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Various schemes of projective methods: the incomplete Galerkin method scheme, used when researching the electromagnetic waves in waveguides, filled with anisotropic medium; incomplete Galerkin methods with impedance boundary conditions, modified projective linking method are considered. Radio engineering and electronics
Modified: 12/31/2005
Tags: Projective method , waveguide , Galerkin method , electromagnetic wave
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Using the mathematical model of dispersion of electromagnetic waves on complex-form objects, the article presents the method of estimating radiophysical parameters of local parts of the surface with claddings, based on the results of measuring angular dependence of effective dispersion surface. ...
Modified: 12/26/2005
Tags: model , electromagnetic wave , dispersion surface
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Scattering of a plane wave by mirror antennas with vibrating radiators is considered. The Fourier coefficients of the vector function equal to the current density on the mirror metal and the tangent component of the electrical vector on the geometric surface, complementing the surface of the mirror to close in some complete function system. Using these coefficients, the series for the given vector-function, converging to the L 2 (S 0 ) surface norm, with each of the terms satisfying to the corresponding...
Modified: 12/22/2005
Tags: scattering , electromagnetic wave , antenna , Fourier
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The method of solving problems of diffraction on non-Rayleight bodies, composed of several Rayleigh bodies is explained. The scattered field is constructed as a sum of fields, created by the assemblage of multifields, each of them is located in the corresponding point of one of the composite bodies. The samples involving two tangent to the generatrix of the cylinder and two touching in the single point spheres are considered. For the former of these samples, the curves of distribution current density...
Modified: 12/19/2005
Tags: diffraction , electromagnetic wave , impedance , boundary , Kirhgoff
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The problem of diffraction of electromagnetic waves on a curvilinear surfaces with piecewise continuous admittance (impedance) boundary conditions, particularly on open-ended metallic surfaces is considered. It is shown that the coefficients of Fourier kind for some complete function ...
Modified: 12/18/2005
Tags: diffraction , electromagnetic wave , Fourier , Meixner
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This is given the overview of the known approximate methods of calculating the scattering of electromagnetic waves by antennas, including calculating the integral and differential surfaces of dispersion; simple formulas for estimating these values are given. In addition, some results that belong to the authors of the work are stated. Radio ...
Modified: 12/11/2005
Tags: electromagnetic wave , antenna , approximate
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