HD TV channels are on the UHF TV band. UHF channels start at 14 and go up. The same antenna that you use for UHF analog TV will work for HD TV. The only thing special about HD is the method of putting the information on the TV signal and the method of decoding it in your TV are digital and not analog. The picture quality of HD is fantastic compared to analog. Another thing about HD off the air is you either have a signal or you don't. That means no more TV pictures with snow or ghost, it just drops out when the signal gets week. When I see someone advertising a HD TV antenna I have to laugh a little, because it is the same antenna, just a new name.
Bill & Camillla
Thor Four Winds 31L Class C and Jeep Liberty