Electronically steerable antenna-feed techniques (esaft)

The flexibility of an electronically steerable phased array offers many advantages. However, in systems where it is required to scan a narrow beam over a small angle, the cost and complexity become prohibitive. The use of large-aperture reflectors has been hampered by the limited scan angle available as well as by the techniques of scanning. Techniques that use a distribution of feeds In the vicInity of the focal point have recently been proposed to alleviate these problems. These techniques offer the advantages of a phased array at reduced cost and complexity over a limited scan angle.