F-35’s Towed Decoys
Whatever weaknesses a stealthy aircraft has in its shaping and coatings can potentially be offset, to a certain degree, by the ability to wreak havoc on enemy radar and communications systems via electronic attacks. In the past, aircraft like the F-117 Nighthawk had zero electronic warfare capabilities as the technology to make such a system’s emissions undetectable and not self-defeating was very limited. So, while aircraft like the F-35 are effective at hiding from the most threatening radar types, and especially when viewed by those sensors from certain aspects, with the frontal-hemisphere profile being most optimized, they are less adept from doing the same when it comes to radars operating at lower frequencies or when viewed from rearward angles.
Source: www.thedrive.com