“The aircraft will be sheathed in an electrical plasma possessing its own electrical properties. Thus, it becomes possible to imagine new methods not only of stealthiness, but also new methods of detection. Moreover, those methods might include methods of jamming the microwave signals creating the jet plasma to begin with. In other words, jamming technologies might be created that could effectively shut down such an engine.”

https://gizadeathstar.com/2020/05/microwave-jet-plasma-engines/