If rabbit ears don't cut it and you find yourself looking for an amplified option I strongly recommend a step up to this:

http://store.gomohu.com/leaf-50-indoor-amplified-hdtv-antenna.html

Amazon makes a knock-off design for $32 that looks highly rated:

http://www.amazon.com/AmazonBasics-Ultra-Thin-Indoor-Antenna/dp/B00X4RAEZC/

We have this Amazon antenna and do not get CBS (living next to the Kent County Country Club). You will need something much bigger/higher to have a chance :/