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 ElectroDynamic Systems Software ScientificTM Radiolocation Systems ResearchTM 
Antenna array Complex directional antenna consists of separate near-omnidirectional antennas (radiating elements) positioned in the space and driven by high-frequency … (from 'Glossary' of our web–site)  |
All Archives2/ 3/ 4/ 5/ 6/ all pages Thursday, May 14, 2009 at 12:05AM
The results of the theoretical estimations and experimental research of characteristics of some finite waveguide phased antenna arrays (PAA) consisting of waveguide elements having a cross–section of a complex shape has been considered; the estimated and experimental radiation patterns have been given; the mutual coupling coefficients, return loss and the level of lateral radiation for the finite PAA consisting of waveguides with a random cross-section working on both linear and circular polarization of the radiated field have been assessed.
Sunday, April 06, 2008 at 12:04AM
We present a method for matching waveguide radiators used in wide bandwidth phased antenna arrays with wide-scanning angle. In order to achieve matching, the following parameters are used: the geometrical parameters of waveguides, the dielectric parameters of materials inside the waveguides, waveguide transformators and reactive waveguide at the aperture, and also a matching device in the form of inductive rods and capacitive diaphragm.
Saturday, April 05, 2008 at 12:04AM
It is presented the electrodynamics analysis of complex cross-section waveguide phased-array antennas with dual polarization. Energetic, polarization and frequency characteristics of cross-ridged circular and square waveguides as elements in phased-array antennas with dielectric covers and supports are studied. An analysis chart is introduced to aid the computation of their mode of operation with sector scanning and frequency band.
Friday, April 04, 2008 at 12:04AM
Phased antenna arrays (PAA) of waveguides with complex cross sections are analyzed in this work. Particularly, the analysis focuses on linearly polarized waveguides with dielectric matching units (inserts, covers and waveguide transformers). The study of power and frequency characteristics of these PAA in scanning sectors is included. An optimization method for the design of this kind of arrays in order to achieve broad frequency band and scanning sectors is also presented.
Monday, March 31, 2008 at 12:03AM
A mathematical model of a printed radiator pattern on a screen with finite dimensions is developed. Results of numerical experiments are presented.
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