[tgflynn]

It's conceivable. I've seen solid state RF amplifier modules successfully combined into some quite high power units and that was over 20 years ago. I haven't followed the technology since so I'm not up to date on that at all. In any case I think a 10 MW amplifier and associated power supplies and cooling equipment would need to be large and heavy.

A single jet engine generates about 20 MW of power and I'd be very surprised if you could pack 10 MW of RF amplifier into that kind of size and weight envelope.

[blurbleblurble]

Makes sense. Maybe we'll see a fusion plasma thruster before the power/energy storage shrunk enough to make this viable as is (in the atmosphere and gravity of Earth at least).