A phased array antenna having two stages of time steering control that achieve system performance requirements at minimum cost. The first-stage which is traditionally located at the subarray level, is a multi-bit time delay unit that has a sufficient number of bits to meet the system's range resolution...http://www.google.de/patents/US5414433?utm_source=gb-gplus-sharePatent US5414433 - Phased array radar antenna with two-stage time delay units
