This document discusses AESA (Active Electronically Scanned Array) radar technology used in fighter jets. It begins with an introduction of AESA radar, describing how it forms beams electronically without physically moving antennae. It then discusses limitations of older PESA radar and advantages of AESA radar, including increased reliability, multi-mode capability, and resistance to electronic jamming. The document concludes by discussing future applications of AESA radar, such as upgrades to legacy aircraft and systems, to remain relevant against modern electronic warfare threats.