Combining GTD with Mom in Analysing the Scattering from the LICEF Antennas on the SMOS Satellite

06 Nov 2006

The present paper describes the determination of the scattering from the LICEF antenna elements on the SMOS satellite taking into account that the solar panels rotate during the flight of the satellite.

The task is well suited for a ray analysis based on the Uniform Geometrical Theory of Diffraction (GTD) since this method is fast which is essential due to the time varying scattering structure. However, the source antennas are mounted in deployable arms which interact with the antenna elements and shields for the direct illumination of the satellite body and the solar panels.

GTD is not suited for determining the scattering in structures very close to the source antenna. The scattering in these structures may then be solved by the Method of Moments (MoM). On the other hand the full structure is too large to be handled by MoM.

The paper describes how the two methods are combined, especially the problem of delimiting the structures handled by MoM from the structures handled by GTD as the latter must be in the far field of the former while they nevertheless are connected parts of the same satellite structure.

Publication: Proceedings of the 1st European Conference on Antennas and Propagation (EUCAP2006)
Place: Nice, France, 6-10 November 2006

Frank Jensen / Knud Pontoppidan /
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