A high gain VHF/UHF antenna looks like this:
http://www.winegarddirect.com/viewit...7698P%29&post=
Good for all channels.
Now that channels 2-6 have moved to the UHF band, the VHF elements (behind the reflector) are not as long as in the past.
A high gain UHF only looks like this:
http://www.winegarddirect.com/viewit...P%29&p=SHD9095
Good for channels 2-6 (now in UHF band) and 14 - 83
These antennas are highly directional and normally require a rotor. Also a pre-amp on the antenna mast.