Signal problems for indoor Sirius receiver

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.

You could go with an antenna extension cable and that would give you more useability inside the home as far as moving it around goes. The antenna you have has a 21 foot cable on it. You could go with a 50 ft extension cable and be very versatile. It also has an in-line amplifier and will help you also get the signal better. Here is a link to the product: http://www.tss-radio.com/sirius-ante...le-p-3834.html