Some incredibly obtuse musings from the nearly old
First, there is NO such thing as a "digital antenna." TV antennas are the very same right now today as they have always been, I.E. either VHF only, UHF only, or a combo of UHF/ VHF. There is a wide array of designs, intended to provide more or less gain depending on your distance / location from the transmitter(s) and local terrain (hills.)
One thing you need to do is some research to find out what stations there are, and where they are located. For example, in my area -- a "fringe" of the Spokane area, there are several digital repeaters/ translators, and for a couple of stations, these are in at least TWO locations, so in some cases you can receive the high power main transmitter, as well as two different repeaters rebroadcasting the same programs in low power
The other thing to realize is that digi TV suffers from the very same problems as the old analog sets--except that now it's nearly impossible to troubleshoot
One example is "ghosts." The proper term for this is "multipath," which means that due to reflections, the original signal AND a reflected signal(s) gets to the antenna AT DIFFERENT TIMES. This is what caused "ghosts" because you were receiving a reflected signal AT A DIFFERENT TIME, causing distortion and offset in the original signal.
WHY is this important? Because with digi TVs, you never SEE the ghost, but if it gets bad enough, your picture tiles or freezes, or the audio blanks, or the thing just freezes or goes completely blank.
The same idea is true of interferance of various sorts. Remember when granny next door went on a marathon vacuuming spree, and you were PO'd because your picture went to hell, and the audio sounded like the antique vacuum she used?
Well guess what. The SAME interferance can cause signal deterioration on your digi signal, --and it just tiles, freezes and quits.
Just trying to make you aware. If you are in a hugely strong signal area, you may not have these kinds of troubles. Make sure you buy an antenna appropriate for your area, and you might need a rotator, depending.
Once again, DO NOT get taken in by antenna hype. THERE IS NO SUCH THING as a "high def" or "digital" antenna, it's just marketing hype.