There is no such thing as a digital antenna!!! From Channel Master - "If you've recently decided to explore TV antennas and have spent any amount of time shopping around, don't feel bad if you are thoroughly confused because you are not alone. One of the most common questions we get in our call center is "How can I tell if my TV antenna is HD?"
Here's the most important thing you need to know: there is no such thing as an "HD" or "Digital" TV antenna. The signals from your local broadcast towers are digital, as are the tuners in newer TV sets, but not the antennas themselves.
You don't need a special kind of TV antenna in order to receive digital broadcast signals. You can use a TV antenna from the 1970s and it's going to pick up the same digital broadcast signals as any spaceship-looking, HD-claiming antenna you can buy today, so don't be fooled by the misleading and deceptive marketing claims. "
Antennas are VHF which have long elements which are "cut" for VHF frequencies and UHF which have short elements which are cut for UHF frequencies. Frequencies determine the length of the antennas elements. Channel 2 (54 to 60 MHz) requires very long elements while Channel 12 (204 to 210 MHf) requires very short elements. If you remember old roof top VHF antennas from the 1950-60 out in rural areas, they would cover an area as long and as wide as the average Class B rv roof top area. A Channel 12 roof top antenna was was every bit as long, but no where near as wide. UHF antennas were tiny in comparison. Today's antennas are much smaller and require electronic amplifiers to enhance the signal so the receiver can receive it. Today there are much higher buildings out there to block the signals!