An antenna that can receive UHF signals is all you need

You're using indoor or outdoor antenna? Make sure it is UHF type for better reception.

Do you use any signal boosters to receive analogue TV? If yes, then the signal boosters might be the reason why you are unable to receive digital TV channels.
In most cases, any signal boosters are NOT required at all to receive digital TV signals. Signal reception for analogue TV and digital TV simply works differently.

Try power off your signal booster, and perform auto/manual scan to see if you can receive digital TV signals. If still cannot, try use an UHF indoor antenna to see if you can receive digital TV channels. If can, then the culprit is the connection between your antenna to your receiver.

TECHNICAL EXPLANATION:

If your location has strong digital TV signals and you insists to use signal boosters, "signal overload" may occur where your receiver or TV's built-in tuner to "receive too much signals", and it will display as "No Signal". Use signal boosters only if you are desperate with the reasons such as TV transmitter tower is very very far away (e.g. 100km+) from your location, or you use splitters to split cable connection from antenna to receiver into more than one (this can weaken the signals), or your cable is old and not in good condition (better just change new cable).