Back when? TV antennas are TV antennas as has been pointed out many times. Some don't offer full TV band support but they're still TV antennas.but what other Digital Antennas did they have back then aside from the Channel Master CM-2020?
"Digital" and "HD" were terms glued onto conventional TV antennas to try to generate excitement by suggesting that there was something new inside. In most cases, these were the same old same old that had the artwork on their packaging redone.
In many cases, UHF-only antennas were marketed heavily as so many of the broadcast stations were UHF. That is changing.
Channel Master makes several models of full-spectrum TV antennas as does RCA and Winegard. The key terms to look for are coverage of VHF, UHF and especially FM (at the top edge of the VHF-low band).
Speaking of FM, think of Digital Antennas this way: The marketroids would have you believe that FM stereo requires a more advanced antenna than FM monaural. It doesn't but it certainly sounds important.