Well, I understand your question!
You can take a look here at some of the Winegard home antennas.
Winegard home UHF antennasI don't think the Flat Wave is what you would want but the other will do the job.
Now, with that said, are you sure you only need UHF? You know your market better that I, so I will not question it, but just be sure you know what frequencies the various channels are broadcast on.
I found an interesting list of TV stations in PA (Wikipedia, of course). Take a look at the channels you want to watch. The RF list shows UHF (above 14)/ VHF (13 and below).
PA TV Stations