Apparently no one who knows what they'd be talking about has seen this, so I'll have to take a pass.
A ramjet is basically a tube open at both ends and moving very quickly so that air enters one end and leaves out the other. Because of the speed of the air moving through it and the shape of the tube, the air is compressed in the tube and something sprays fuel into the compressed air, which ignites and produces higher-velocity air moving out the end of the tube. It's a jet engine, although normal jets have to have elaborate turbine-compressor thingys to do the air compression.
The ionizing radiation thing is a goofy UFOs-are-space-travellers thing, where the UFO sprays ionizing radiation in front of itself, which heats and disperses the air in front of it, allowing the UFO to travel faster. Or something. It's goofy.
But still not perfectly safe. I'm not sure how much power a F-16 puts out but when I was working on space surveilance radars we were very careful not to be pointing our beam where people might be.
A roommate's girlfriend worked on PAVE PAWS. They were very careful where they steered the beam. Rumor was the one on the east coast cooked some fish when they pointed it into the ocean.
And of course the microwave oven was conceived when a guy walked in front of an operating radar and it melted the chocolate bar in his pocket. It gave him a genius idea!
The best part about this story is that if you tell people who don't know about it, they'll think you're full of shit. But it's absolutely true.