I got this one from amazon and it works great. It's only $16. I've also found that I can pretty much put it anywhere and it works - it's currently sitting horizontally under the tv stand and the picture is great.
https://www.amazon.com/dp/B00X4RA74A
I get all the local channels, which look better than they did when i had comcast, plus PBS and a bunch of home shopping and religious tv.
I used to have a full package from Comcast, but it's been a year now since I cut it out and I haven't had a single day where i've missed it. I supplement with Netflix and subscribe to HBO Now when there's a show on I want to watch.
Amazon makes a really great one. I got the 50 mile one and it's pretty great.