 In 2017, the Patriot will get a new active electronically scanned array (AESA) radar that has greater range and sharper discrimination.The main Gallium Nitride (GaN)-based AESA array measures , is a bolt-on replacement antenna for the current antenna, and is oriented toward the primary threat; new rear panel arrays are a quarter the size of the main array and let the system look behind and to the sides, providing 360-degree coverage.The GaN AESA radar also has 50 percent less maintenance costs.