I’m not sure exactly what you’re hooking it up to, but I had good success with this Hauppauge USB tuner hooked up to one of those flat antennas. I used it on Ubuntu Server 20.04 if I recall correctly, and they have a PPA as well as fairly helpful Linux instructions. Some of their other products might do the satellite and cable channels as well as over the air, but I have no experience with it, so your mileage may vary.