I am new to the forum and have been searching for help with my issue with the signal on XM radio. From time to time, the signal will drop constantly. I called XM radio and as always, they say the problem is not on their end. I was looking into getting a shark fin antenna to see if it will fix the issue. Can anyone give me ideas on what to try first to fix the issue or which shark fin antenna would be best to use to solve the issue.