3D-SAR measurements using a sparse and compact array antenna architecture

We discuss sparse and compact phased array antenna architectures based on the use of multiple transmit antennas in order to reduce the number of needed receiver channels. We also present the design of a sparse and compact phased array antenna together with measurement results of a scene containing a car and some corner reflectors to verify the theoretical study. The sparse and compact array architectures discussed can potentially reduce the number of needed receiver channels in a phased array antenna or decrease the physical size to approximately half the conventional size.