Introduction - If you have any usage issues, please Google them yourself
Electronically scanned arrays provide the capability of commandable,agile,high-gain beams,which is advantageous for applications such as radar,weather surveillance,and imaging.In contrast to reflector antennas,which require a gimbal for steering the array beam,ESAs electronically scan the array beam in space without physical movement of the array.Scanning the beam with an ESA can be performed on the order of microseconds as opposed to milliseconds for a reflector.