Raytheon Co. demonstrated their successful prototyping of Active Electronically Scanned Array (AESA) and Gallium Nitride (GaN) technologies into the US Patriot Air and Missile Defense System radar. In addition to enabling future 360 sensor coverage, these technologies will significantly increase the defended area and decrease the time to detect, discriminate and engage threats. The introduction of GaN-based AESA technologies will also further improve reliability and lower the life cycle costs for the Patriot radar, beyond what has already been achieved with other recent Patriot radar improvements.