I've noticed that the elements of a standard UHF antenna are 'conductively-isolated' from the actual antenna.
Ie. each element connects to the antenna with a plastic clip-on.
How do these antenna's work in terms of 'catching' a signal?
What is the role of the elements if they don't connect to one-another like the standard Yagi Uda array?
Also do UHF channels use COFDM?