Passive electronically scanned array
Type of antenna
_Firefinder_Radar.jpg/500px-Q-37_(V)_Firefinder_Radar.jpg)
A passive electronically scanned array (PESA), also known as passive phased array, is an antenna in which the beam of radio waves can be electronically steered to point in different directions (that is, a phased array antenna), in which all the antenna elements are connected to a single transmitter (such as a magnetron, a klystron or a...