@Lee-Anne: Nope. If your TV has an ATSC tuner in it, then any antenna will work. Digital TV broadcasts are using the same frequencies that used to be used for analog TV. Any antenna that can pull in the full range of VHF and UHF will work for digital as well.
I’ve been using a 30-year-old rabbit-ears antenna with a TV at home. It works great. I get about 20 channels, all free, all with perfect picture quality. (Until it doesn’t. The nature of digital is that the picture is either perfect or you get nothing. There’s no gradual degradation from bad weather like you used to get with analog TV.)