>You're looking at a picture of a single circuit the size of a large office building, built to a precision of 100 microns. I agree that this is impressive, but remember that you get to cheat: You build the thing, measure how far off you are, and stick delay lines in the short branches until everything lines up.

they call that Agile Microwave Engineering

oh, and you must have two microwave engineers working on each delay line.