re: If radio waves can move objects in a vacuum,
You're not wrong at all. However, the thrust would be very small. There must be some other mechanism involved than simply expelling/iminging photons. For example, perhaps the E/M waves are causing spallation on the debris. That could give the debris a push. But in that case it seems to me pulsed lasers would be more efficient than radio waves. Does anyone have a better understanding on how this "resonance" concept is supposed to work?
Dave M