First, there's no such thing as a "digital" antenna. Any good TV antenna will do the job quite well. If you're thinking about going with an antenna, make sure it's a VHF/UHF capable model. Most stations are operating in the UHF band, which has proven better for digital TV. Your local stations may be identifying by their old analog channels, the ones you're familiar with. Stations use what's called a "perceptual" channel. This keeps them in the same position they'd be on an old, analog set. You also have their digital subchannels, which add a "-2" and above, to that number. If your TV is a newer model that also includes "NextGen TV", which offers an even better picture, better sound, and a host of new features that will be offered in the near future, you'll be able to take advantage of the improvements it offers. In my area, all of the major stations are available using the NextGen advanced system (also known as ATSC3.0). This will deliver, currently, a 1080p picture, rather than either 720p or 1080i., and with better color, better contrast and brightness, and sound which can include Dolby Atmos. Eventually, they'll be offering 4K programming, too. I recommend using antennaweb.com, a website that can help you determine what type of antenna you'll need in your area, but also where to point it, and how strong the signals will be. Most important is the RF channels your local stations are broadcasting on. Happy hunting! Oh, and stoopid, you may find the channels that went missing if you re-scan your TV.
