Just wondering if I'm the only one that has a Sirius issue. The issue being that the signal is very easy to lose. If I pull under any super structure such as overpass, drive through awning, etc... I lose signal until I'm in a complete clearing. Even traveling down a country road with heavy tree limbs overhanging, I lose signal. Of course it's always during my favorite song. Is this the same with XM? I've seen XM antennas you can put inside your office or home with no view of the sky whatsoever and get great reception. Any ideas? Do I have a bad antenna?