Spacecraft antennas tend to be a significant resource on a spacecraft, and are, to a first order, intricately intertwined with mission definition. It is therefore not surprising that the requirements of the antennas implemented on Eutelsat satellites are becoming increasingly varied and challenging. These antennas have to be optimized for the classical parameters such as co-polar gain and cross-polar gain, but the criteria are also becoming more complex. Frequency reuse is increasingly becoming the norm, so that together with the maximization of the required parameters over the required service areas, minimization of the co-polar gain over the required isolation areas is also required. Furthermore, the number of distinct market areas that a single Eutelsat satellite has to address is also increasing. Consequently, careful design of the antenna farm is needed, often presenting challenges for spacecraft accommodation.
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