If you want to keep watching Cartoon Network, then I recommend Sling TV. It's a live TV streaming service that has CN in their basic package, which only costs $20 a month. For another $5 a month, you can get a DVR. Though if you want to watch broadcast networks, they don't have much in the way of that. They offer extra packages with broadcast being one of them for $5 a month, but all they have is ABC (and even then, it says "Select Markets" under the ABC logo), Univision, and UniMás. And I don't know enough about antennas to help with that, though I didn't think they seemed like something you can record stuff on. In any case, I'll link Sling's website. https://www.sling.com
It was moved to a higher package. I have digital at home and can still watch CN, but the break room TV at my work only has basic channels and when I try to watch CN on it now, it says it requires a subscription service.