Many of the so-called "digital" indoor antennas don't have "ears" at all. Your antenna needs to be rated for UHF and VHF reception. There are a few channels still broadcasting on VHF and in my area this includes two large networks. If you know that the channel you are looking for is available where you are, try your antenna out a window. Most of the time, the hard to get channels do come in with the antenna outside - which means get an antenna made to go outdoors and put it on your roof. When you look at the websites that identify the digital broadcast channels and their direction, the site will say that this is based on an outdoor antenna on a twenty foot tower. Also turn the antenna and you may find that different channels come in (though you may lose the ones in the other direction.)