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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 …

(from 'Glossary' of our web–site)






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12/ 3/ 45all pages

Saturday, April 24, 2010 at 07:04PM

The description of wideband radiators on the base of symmetrical slot line is presented. Different types of slot and different variants of excitement unit are considered. Methods of slot antennas analysis are shown. In conclusion antenna arrays on the base of slot radiators are presented.
 

Wednesday, January 06, 2010 at 12:01AM

There was a study of mathematical modeling of microstrip oscillators with a substrate in the form of plane layered media based on the use of integral and integro–differential equations of the first kind; there was provided substantiation and the basics of building the algorithms of a numerical solution to the equations; examples of the numerical study of the equations for oscillators and layered media with varied topology were given; the case of microstrip oscillators with finite conductivity was studied; the integral equation for the current of the oscillator was derived and examples of its numerical study for oscillators made of high–temperature superconductors were given.
 

Sunday, May 17, 2009 at 12:05AM

Simple correlations allowing the radiation pattern structure of a spherical antenna array with ring radiators to be analyzed have been obtained with the help of the Poisson summation formula and the stationary phase approximation. Dependencies allowing the distance between radiators to be determined by the necessary radiation pattern type of an antenna array have been obtained.
 

Saturday, May 16, 2009 at 12:05AM

The input impedance of an electrical vibration generator has been defined as a ratio of the voltage in the gap to the current in the feed point; complex current distributions along the half–wave and full–wave vibration generator for various vibration generator radiuses normalized to the wavelength have been estimated; dependency charts for the real and imaginary components of the input impedance of the electrical vibration generator from the branch length of the vibration generator normalized to the wavelength for various values of the vibration generator radius normalized to the wavelength.
 

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.

12/ 3/ 45all pages

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