Editing Phased array (section)

=== Dynamic phased array ===
Each array element incorporates an adjustable phase shifter. These are collectively used to move the beam with respect to the array face.

Dynamic phased arrays require no physical movement to aim the beam. The beam is moved electronically. This can produce antenna motion fast enough to use a small pencil beam to simultaneously track multiple targets while searching for new targets using just one radar set, a capability known as ''track while search''.

As an example, an antenna with a 2-degree beam with a pulse rate of 1&nbsp;kHz will require approximately 8 seconds to cover an entire hemisphere consisting of 8,000 pointing positions. This configuration provides 12 opportunities to detect a {{convert|1000|m/s|mph km/h|abbr=on}} vehicle over a range of {{convert|100|km|mi|abbr=on}}, which is suitable for military applications.{{citation needed|date=July 2014}}

The position of mechanically steered antennas can be predicted, which can be used to create [[electronic countermeasures]] that interfere with radar operation. The flexibility resulting from phased array operation allows beams to be aimed at random locations, which eliminates this vulnerability. This is also desirable for military applications.