Raytheon [RTN] said this week it has moved forward in its development of the Next Generation Jammer (NGJ) for the Navy, having successfully completed wind tunnel testing of a power generation subsystem.

Raytheon said it housed the subsystem in a full-scale model of the NGJ pod to demonstrate power generation, transient load switching and thermal control of the unit.

Several companies are competing in the NGJ program, among them the Boeing [BA] and ITT Exelis [XLS] team, Northrop Grumman [NOC] and BAE Systems.

The NGJ is designed to be an airborne system to jam enemy communications under the Airborne Electronic Attack (AEA) program. The purpose is to replace ageing systems with a new one that can address changing threats in electronic warfare.

The first of the NGJs are expected to be installed on the EA-6B Prowler and possibly later on the Navy’s version of the F-35 Joint Strike Fighter.