antenna

All, I have a 2005 Acura MDX Touring edition and this winter the Radio Antenna froze and broke off in the base. I don't have a picture handy but if you are familiar this is the small rubber stub style antenna and the base looks like the satellite radio shark fin like style but this is radio...

I just purchased a 2001 MDX from the original owner and the radio's reception doesn't seem to be that great. I'm planning to take it to the dealer but before I do that, has anyone experienced this issue? Is there such a thing as an antenna booster or does it have to be replaced entirely?