I have a Sirius SC-H1 receiver connected to my Sony receiver.

Because of cable length and location, the best place I could put the little antenna that comes with this unit is on the floor just inside a patio door. There is a roof/overhang over the patio.

Usually I get signal for 20 minutes or so, then it's lost and I have to move the antenna slightly. Very frustrating. We also have steel siding, so not sure if that's affecting reception.

Is there any kind of high gain antenna I can use inside with this setup? I really would rather not have to drill through the exterior wall to thread an antenna cable through.