A wide-scan phased array antenna for a small Active Electronically Scanned Array: A review

Phased arrays when mounted on aircraft and missiles will be capable of allowing only the desired signals to be received and simultaneously suppress all other unwanted ones incident from hostile sources. This in turn will make them invisible for the radars at the enemy base or on their aircraft. The paper discusses about the Phased array antenna, Mechanically Steered Planar Array, Passive Electronically Scanned Array, Active Electronically Scanned Array, Wide angle scanning phased array, Mutual coupling effects in phased array and MEMS Electronically steerable antennas. The main aim is analysis of antenna elements suitable for wide-angle scanning array antennas which are useful in airborne radar applications and considers problems related to the design and the analysis of wide-angle scanning phased arrays. The antenna aperture consists many radiating elements used for beam-forming and hence through the adjustment of elemental phases steer the beam efficiently. Moreover, they are capable of rejecting all the unwanted components of the received signals while maintaining at the same time sufficient pattern gain in the desired directions. These characteristics can be implemented for stealth applications.