Adaptive forming and adjusting clusters of multi-beam hybrid mirror antenna for stabilizing the energy potential of a satellite communications system in changing thermal circumstances. Abstract

Zhurnal Radioelektroniki - Journal of Radio Electronics. eISSN 1684-1719. 2020. No. 1
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DOI 10.30898/1684-1719.2020.1.10

UDC 621.396.67.012.12

Adaptive forming and adjusting clusters of multi-beam hybrid mirror antenna for stabilizing the energy potential of a satellite communications system in changing thermal circumstances

V. V. Mochalov ^1,2, A. G. Romanov ¹, I. Yu. Danilov ¹, Yu. I. Choni ²

¹ JSC "Academician M.F. Reshetnev Information Satellite Systems", 52, Lenin Street, Zheleznogorsk, Krasnoyarsk region, 662972, Russia

² Kazan National Research Technical Universitynamed after A. N. Tupolev - KAI, 10, K.Marx St., Kazan, Tatarstan 420111, Russia

The paper is received on January 17, 2020

Abstract. In order to ensure the required level of energy potential of a satellite communication system, it is important that the orientation of the beams of a large hybrid reflector antenna is stable, despite the fact that the reflector profile is subject to distortion due to thermal effects in particular. The paper discusses three approaches to achieving this goal by adaptively adjusting the weight coefficients of the clusters that form the beams: a) for fixed hexagonal clusters, b) for reasonably shifting clusters of hexagonal configuration, c) with full control over the position and configuration of the clusters. Using an approximate electrodynamics’ model, the validity of which is confirmed by calculations in the Ticra Grasp software, the average and worst values of the gain for a series of reflector distortions are calculated and investigated. The results obtained confirm that the initial (in the absence of adaptation) dispersion of the beam gain in the working area by 3.1 dB is reduced to the following values depending on the type of adaptation: 1) 1.1dB when controlling only weighting coefficients of clusters; 2) 0.2dB when moving the hexagonal cluster following the maximum of the focal spot in addition to adaptation of the weighting coefficients; 3) 0.1dB when changing the configuration of clusters in accordance with the relief of focal spots and adjusting the weighting coefficients; by the way, this increases the beams gain by 0.6dB due to enlargement of the cluster areas.

Key words: multi-beam hybrid parabolic antenna, reflector profile distortion, cluster, weight coefficients, focal spot, beam orientation.

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For citation:

Mochalov V.V., Romanov A.G., Danilov I.Yu., Choni Yu.I. Adaptive forming and adjusting clusters of multi-beam hybrid mirror antenna for stabilizing the energy potential of a satellite communications system in changing thermal circumstances. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2020. No. 1. Available at http://jre.cplire.ru/jre/jan20/10/text.pdf
DOI 10.30898/1684-1719.2020.1.10