If you are not concerned much about aesthetics you could get this high gain outdoor antenna and place it indoors by the window:
https://www.rfwel.com/shop/2_5-2_7GH...l-Antenna.html. Because this has 18dBi of gain you don't have to worry about losses from the window or from the cable that you will use to run from the antenna to your Clear Hub Express so pretty much this will give you the same (or even better) performance as you are getting with the Clear Hub by the window.
You can get this antenn...
Tweet
