Development of Ray Tracing Algorithms for Scanning Plane and Transverse Plane Analysis for Satellite Multibeam Application

Autor: N. H. Abd Rahman, M. T. Islam, N. Misran, Y. Yamada, N. Michishita
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: International Journal of Antennas and Propagation, Vol 2014 (2014)
Druh dokumentu: article
ISSN: 1687-5869
1687-5877
DOI: 10.1155/2014/812461
Popis: Reflector antennas have been widely used in many areas. In the implementation of parabolic reflector antenna for broadcasting satellite applications, it is essential for the spacecraft antenna to provide precise contoured beam to effectively serve the required region. For this purpose, combinations of more than one beam are required. Therefore, a tool utilizing ray tracing method is developed to calculate precise off-axis beams for multibeam antenna system. In the multibeam system, each beam will be fed from different feed positions to allow the main beam to be radiated at the exact direction on the coverage area. Thus, detailed study on caustics of a parabolic reflector antenna is performed and presented in this paper, which is to investigate the behaviour of the rays and its relation to various antenna parameters. In order to produce accurate data for the analysis, the caustic behaviours are investigated in two distinctive modes: scanning plane and transverse plane. This paper presents the detailed discussions on the derivation of the ray tracing algorithms, the establishment of the equations of caustic loci, and the verification of the method through calculation of radiation pattern.
Databáze: Directory of Open Access Journals
Externí odkaz: