"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 5, 2018

contents of issue      DOI  10.30898/1684-1719.2018.5.7       full text in Russian (pdf)  

Radomes with properties of angular filtration for parabolic antenna


V. N. Semenenko, K. M. Baskov, I. I. Krasnolobov, T. A. Furmanova, D. I. Akimov
Institute for Theoretical and Applied Electromagnetics of the Russian Academy of Sciences, Izhorskaya 13, Moscow 125412, Russia


 The paper is received on April 19, after correction - on May 15, 2018


Abstract. The approaches to increase the noise protection level of parabolic antennas through inclusion of angular filters of antenna radiation into the radiotransparent radomes have been investigated in this paper. Various configurations of radomes with the antenna hood, having the absorbing material, and angular filters, which together allow reducing the rear and far lateral radiation of the antenna, are considered. The comparison of radomes' radio-technical characteristics, obtained experimentally and in numerical simulation, are presented. The advantages and shortcomings of the known angular filter construction, based on four grids of wires, have been examined. This filter is characterized by strong angular filtration capability, but its manufacturing requires very accurate tolerance holding. The angular filter with elements, having substantial electric moments, and its equivalent circuit analog for electrodynamic analysis of the filter's properties are presented. Vibrators and spirals of length much less than wavelength were used as elements with substantial electric moments. In case of spiral elements their diameter must be much less than length. Angular dependences of transmission coefficient of filter with spiral elements, calculated with software package FEKO and measured, are compared. The measured direction patterns of the parabolic antenna, which is used in radio-relay communication and has the hood with the absorbing material attached, two angular filters, made of resonant vibrators, and the three-layered protecting dielectric wall, are presented. Inclusion of angular filters into the hood is shown to considerably reduce the level of rear and lateral radiation of parabolic antenna. Furthermore, angular filter production technique is quite simple and doesn't require holding strict tolerance.

Key words: parabolic antenna, antenna hood, angular filter, rear and lateral radiation, radome.


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For citation:
V. N. Semenenko, K. M. Baskov, I. I. Krasnolobov, T. A. Furmanova, D. I. Akimov. Radomes with properties of angular filtration for parabolic antenna. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 5. Available at http://jre.cplire.ru/jre/may18/7/text.pdf

DOI  10.30898/1684-1719.2018.5.7