Does somebody make an external WI-FI antenna that will mount on a Travel Trailer? With both my Desktop & laptop computer, I get a tremendous drop in signal strength when inside. My little 4" rubber antenna on the wireless adapter in my desktop one is mounted on the lowest PCI slot, so just can't get through the thick walls well enough. Can't I install some kind of an external antenna, and then, either go to a booster inside, or screw the antenna cable directly on to my WI-FI card, in place of that little antenna, or get maybe get a BETTER (longer) antenna instead?