

Antenna array Complex directional antenna consists of separate nearomnidirectional antennas (radiating elements) positioned in the space and driven by highfrequency … (from 'Glossary' of our web–site) 
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Search on siteUse tags cloud or enter into field a search phrase and choose section of search. 1/ 2/ 3/ The quantitative analysis of physical processes that occur during the excitation of planar and rectangular waveguides with an infinite flange, with a bending flange and an array of planar and rectangular waveguide radiators on an infinite plane and on an infinite wedge has been carried out.
The quantitative analysis of physical processes that occur during the excitation of planar and rectangular waveguides with an infinite flange, with a bending flange and an array of planar and rectangular waveguide...
Modified: 10/04/2010
Tags: admittances , antenna , array , waveguide , radiators , wedge , results , numerical , experimental , studies Path: Home / Publications / Archives Equations for the “irregular” and “regular” transfer admittance of the waveguide radiators of an antenna array located on a side of an infinite ideally conductive wedge is deduced.
Equations for the “irregular” and “regular” transfer admittance of the waveguide radiators of an antenna array located on a side of an infinite ideally conductive ...
Modified: 10/04/2010
Tags: admittances , antenna , array , waveguide , radiators , wedge , deducing , relations Path: Home / Publications / Archives Approach for the analysis and Q–factor estimates of patch antennas with artificial dielectrics substrates for decimeter and larger wavelengths have been considered. Parameters range not leading to significant normal dispersion have been estimated and treated. Also shown that a frame of periodic system of capacitive ...
Modified: 03/30/2008
Tags: antenna , analysis , dispersion Path: Home / Publications / Archives A short digest of the methods that are applied for antennae decoupling decreasing in the presence of an underlying surface is given. The computation results of weakly directional antennae decoupling with the help of periodic ribbed and strip structures located on an underlying surface along a coupling ...
Modified: 03/23/2008
Tags: method , antenna , surface , frequency Path: Home / Publications / Archives The article presents a critical analysis of possible uses of metamaterials to improve operation of antenna devices and points out directions of necessary studies in the field of metamaterials.
Radio engineering and electronics
Modified: 11/16/2007
Tags: metamaterials , Veselago , antenna Path: Home / Publications / Archives It is shown that when the antenna radius is increased, directive gain of spherical antenna with optimal excitation asymptotically approaches directive gain of the equivalent flat cophasal aperture with uniform amplitude–phase distribution of collinear currents. The results of ...
Modified: 01/10/2007
Tags: spherical , antenna , approximation , current Path: Home / Publications / Articles ... spherically symmetric structure, excited by a generalized Huygens, are considered. It is shown that the method is based on reducting the source vector problem to two scalar problems for Debye potentials. The amplifying ration and directional diagrams of antennas based on spherical dielectric lenses are researched and experimental estimation of numerical results is given.
Radio engineering and electronics
Modified: 01/23/2006
Tags: antenna , spherical , dielectric , lens , Debye Path: Home / Publications / Archives A numerical algorithm for solving the problem of diffraction of electromagnetic waves on a multilayer dielectric lossy sphere when amplitudephase distribution of the exciting field is arbitrary is developed. The algorithm is based on representing the field on the source surface as an aggregate of the electrical and magnetic dipoles and reducting the vector problem to two scalar ones for the case of a point source. The results of calculating the directional diagrams and amplifying ratio are compared...
Modified: 01/20/2006
Tags: modeling , spherical , lens , antenna , dipole Path: Home / Publications / Archives The numerical research and optimizing the characteristics of antennas based of doublelayer spherical dielectric lenses, taking into account aberration effects, lens refelections, dielectric losses, radiator directivity diagrams and transition layers are carried out. As an optimization criterion, the maximum value ...
Modified: 01/17/2006
Tags: lens , antenna , dielectric , sphere , optimization Path: Home / Publications / Archives The equation for the maximum working bank and coordination level, dependent on the electrical size of some ideal according to the Chu and Harrington criteria antenna is reduced. The characteristics of coordination is assumed to be rectangular and the contact ration can be arbitrary. The received equation expresses the limit of the Chu–Harrington limit for the relative line, coordination level and electrical ...
Modified: 12/29/2005
Tags: radiator , antenna , equation , Chu , Harrington Path: Home / Publications / Archives 1/ 2/ 3/ Sorted by relevance / Sort by date 
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