No, the power is spread across radio and tv transmitters, cell towers, and the like. The radar sites can be largely passive as long as they are synchronized.
I don't know where you are getting your information but it is wrong, multiple transmitters cause a huge problem as the signals can only be synchronized in a line every where else the two signals will be out of phase. This will essentially cause one transmitter to jam the other.
365 Days of drinking Lo-Cal beer. = 1 Lite-year