I have a DB2 antenna I made myself from 2x4's coat hangers and cookie cooler sheet that works pretty good inside the house.
Kind of like this one, but I used some chrome plated coat hangers for the elements and some stripped copper home wire to connect the matching transformer.
Then you just need to aim it correctly.
Here's a picture of my Gray-Hoverman antenna I built:
I made that same antenna from some plans I found on the internet. It worked much better than I had hoped. I got ten channels of HD. Great little antenna for medium and high frequencies.