"JOURNAL OF RADIO ELECTRONICS"  N 4, 2013

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MATHEMATICAL MODELING OF ULTRAWIDEBAND MULTIBEAM REFLECTOR ANTENNA

 

K. M. Baskov 1, N. I. Bobkov 2, I. I. Krasnolobov 1, V. N. Semenenko 1
 

1 Institute for Theoretical and Applied Electromagnetics of RAS,

2  JSC “All-Russian Scientific Research Institute “Gradient”, Rostov-on-Don

 

Received April 23, 2013

 

Abstract. A method for the analysis of the radiation characteristics of ultrawideband multibeam reflector antennas for radiomonitoring purposes and passive location of radio emission sources is proposed in the article. The partial pattern’s stabilization of this antennas is achieved by using frequency-dependent radar-absorbent material covers on the reflector’s working surface and ultrawideband feed horns with radiation characteristics in the H-plane approximate to the characteristics of the common-mode horn. To optimize the radar-absorbent material coating scheme a mathematical model for calculating the radiation characteristics of the antenna was developed. During modeling the antenna a combined approach, which combines both experimental measurement data feed characteristics and radiation patterns design using physical optics, was applied.

Keywords: ultrawideband reflector antenna, reflector, feed horn, radar-absorbent coating, equivalent aperture, electric and magnetic currents, radiation pattern.