Short antenna spaceborne SAR concepts

摘要

This analysis concludes that, for a "swath/azimuth resolution" (SAR) ratio not exceeding 10~4(as is the case for the missions designed and imagined up until now), it is possible, thanks to new imaging modes based on timing diagram saturation, to reduce the length of the antenna by two (defined along the speed vector) under equivalent performance, antenna area, onboard energy and spectral occupancy conditions. One of the advan- tages is that the Spotlight mode is not needed except if one wishes of to exceed the ratio of 10~4, which gives, in addition to the elimination of the operational limitations of this mode, high cost reduction possibilities with very simplified antenna architectures.