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International Journal of Antennas and Propagation
Volume 2013, Article ID 415069, 13 pages
http://dx.doi.org/10.1155/2013/415069
Research Article

Analysis of Arbitrary Reflector Antennas Applying the Geometrical Theory of Diffraction Together with the Master Points Technique

Departamento de Ciencias de la Computación, Universidad de Alcalá, Alcalá de Henares, 28871 Madrid, Spain

Received 2 November 2012; Accepted 4 January 2013

Academic Editor: Miguel Ferrando

Copyright © 2013 María Jesús Algar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An efficient approach for the analysis of surface conformed reflector antennas fed arbitrarily is presented. The near field in a large number of sampling points in the aperture of the reflector is obtained applying the Geometrical Theory of Diffraction (GTD). A new technique named Master Points has been developed to reduce the complexity of the ray-tracing computations. The combination of both GTD and Master Points reduces the time requirements of this kind of analysis. To validate the new approach, several reflectors and the effects on the radiation pattern caused by shifting the feed and introducing different obstacles have been considered concerning both simple and complex geometries. The results of these analyses have been compared with the Method of Moments (MoM) results.