Sparse Array Antenna Concepts for Spaceborne SAR Applications: An Assessment of Synthesis Methods for Very Large Active Electronically Scanned Antenna Arrays

Antenna design for Ka-band SAR systems used in earth observation missions is demanding for two reasons. A narrow beamshape results in a large aperture, and the frequency band dictates a short spacing between neighboring radiating elements. In our case, this leads to a requirement of more than a million radiating elements. In this thesis it is...