Please Know that Tv transmissions are not like cell phone transmissions with cell phone towers every where. Tv transmission and reception is best when it is line of sight between the transmitting tower and receiving antenna. There are not tv transmitting towers scattered every where like cell phone towers. Any thing less then line of sight is - less then line of sight -. And the reception will be less. You are doing well to get as many channels as you are in the basement. Here is a antenna that looks similar to a satellite dish , Antennacraft HDX 1000. Please note that this antenna and other small outdoor antennas are a compromise on reception. Here are two of several places to buy tv antennas
http://www.solidsignal.com ,
http://www.amazon.com ,
http://www.antennacraft.net ,
http://www.channelmasterstore.com ,
http://www.winegarddirect.com ,
http://www.starkelectronic.com ,
http://www.warrenelectronics.com