I'm annoyed that Dish doesn't have a good solution for this problem. I live in New Mexico, and the walls in my house are 1.5' thick adobe. Dish has a part number to extend the antenna, but to my knowledge, it's not accessible to the technicians, or the public yet.
I made my own solution. to get me by until they release something better. The antenna operates at a frequency that our normal RG6 will support (2.4ghz). I made my own rigged RG6 extension cable. The antenna will push onto a regular barrel connector, and hold just fine. On the receiver end, it's a bit more tricky. I stripped back the jacket, and dielectric to give me just enough center conductor to fit in the connector perfectly flush, then I took the shielding, and put it over the outside of the connector. I wrapped this with foil to shield it even more, then secured it with a clamp to make sure it was snug. Even with the antenna extended, I couldn't get reception 20' away in my bedroom (it has to pass through a total of 3' of adobe walls).
So, tonight I made a parabolic reflector for the antenna. It works great now!!!!! Here is a link to make your own out of a can:
Extend Your Wi-Fi Range With a Parabolic Reflector | PCWorld
It's not super pretty, but once I secure mine to the wall, and dress it up, it'll work great for me!