Design of a satellite antenna for Malaysia beams by ray tracing method

In the implementation of geostationary satellite for various applications such as broadcasting or military, it is essential for spacecraft antenna to provide precise contour beam to effectively serve the required region. Since the Malaysia coverage requires two separate beams to cover the west and east part of the country as shown in Fig.1, precise beam positions and feed positions should be designed. In this paper, a ray tracing program has been developed to achieve precise off axis beams. Features of this program are receiving mode ray tracing that can determine exact feed positions and radiation mode ray tracing that can calculate aperture phase distributions and radiation patterns of off axis beams. Results of antenna designing for Malaysia beam coverage is shown in order to ensure usefulness of this program.