Analysis of the RATAN-600 radiotelescope antenna with a multilevel physical optics algorithm

Christine Letrou (1, 2, 3) , Vladimir B. Khaikin (4) , Amir Boag (5)

1 TSP - CITI - Communications, Images et Traitement de l'Information
2 SAMOVAR - Services répartis, Architectures, MOdélisation, Validation, Administration des Réseaux
3 CNRS - Centre National de la Recherche Scientifique
4 SAO - Special Astrophysical Observatory of the Russian Academy of Sciences
5 Department of Electrical Engineering

The RATAN-600 antenna is a flexible multireflector system composed of reflectors of very large dimensions. An extended system, with improved performance in the millimetric range, includes a focal receiver array. Accurate electromagnetic analysis of such a system, and simulation of three-dimensional (3D) patterns, represents a substantial computational challenge. A fast Physical Optics method based on a multilevel subdivision of the surfaces of integration is proposed to address this problem. This method allows to perform Physical Optics integrals with a computational complexity comparable to that of the Fast Fourier Transform. The algorithm and initial numerical results of its application to the RATAN-600 antenna system are presented.

Mots clés: Radiotelescope; Multireflector antenna; Physical optics; Multilevel algorithm

Domaines: Electromagnétisme

Christine Letrou, Vladimir B. Khaikin, Amir Boag. Analysis of the RATAN-600 radiotelescope antenna with a multilevel physical optics algorithm. Comptes Rendus. Physique, 2012, 13 (1), pp.38-45. ⟨10.1016/j.crhy.2011.10.011⟩. ⟨hal-00726148⟩