[Analyse de lʼantenne du radiotélescope RATAN-600 par une méthode dʼOptique Physique multi-niveaux]
Lʼantenne du radiotélescope RATAN-600 est un système flexible composé de plusieurs réflecteurs, dont certains de très grandes dimensions. Dans sa configuration la plus performante pour le domaine millimétrique, elle est dotée dʼun réseau focal. Un tel système constitue un défi du point de vue de lʼanalyse électromagnétique, si lʼon souhaite disposer de résultats précis sur son diagramme dans lʼespace en 3D. Une méthode dʼOptique Physique rapide basée sur une décomposition multi-niveaux des surfaces dʼintégration, permettant de rendre la complexité des calculs dʼintégrales comparable à celle de transformées de Fourier rapides, est proposée pour répondre à ce besoin. Lʼalgorithme de la méthode est présenté, ainsi que son application au cas du RATAN-600 et des résultats numériques.
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.
Mot clés : Radiotélescope, Antenne multiréflecteurs, Optique Physique, Algorithme multi-niveaux
@article{CRPHYS_2012__13_1_38_0,
author = {Christine Letrou and Vladimir Khaikin and Amir Boag},
title = {Analysis of the {RATAN-600} radiotelescope antenna with a multilevel {Physical} {Optics} algorithm},
journal = {Comptes Rendus. Physique},
pages = {38--45},
publisher = {Elsevier},
volume = {13},
number = {1},
year = {2012},
doi = {10.1016/j.crhy.2011.10.011},
language = {en},
}
TY - JOUR AU - Christine Letrou AU - Vladimir Khaikin AU - Amir Boag TI - Analysis of the RATAN-600 radiotelescope antenna with a multilevel Physical Optics algorithm JO - Comptes Rendus. Physique PY - 2012 SP - 38 EP - 45 VL - 13 IS - 1 PB - Elsevier DO - 10.1016/j.crhy.2011.10.011 LA - en ID - CRPHYS_2012__13_1_38_0 ER -
Christine Letrou; Vladimir Khaikin; Amir Boag. Analysis of the RATAN-600 radiotelescope antenna with a multilevel Physical Optics algorithm. Comptes Rendus. Physique, Volume 13 (2012) no. 1, pp. 38-45. doi : 10.1016/j.crhy.2011.10.011. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2011.10.011/
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