I used one of these C. Crane US3 Super USB Wifi Antenna 3 a few years back. Available from AMAZON or C CRANE direct. It comes with disc program and has to connect to your computer/laptop USB port. My old XP computer ended up quitting on me and I never could find the program (Didn't look very hard) to get it working on the replacement computer.
This was great in the trailer using the suction mounts for the antenna mounted in the RV Window.
What we do here at the house now with our two parked RV TRAILERS is use one of these Linksys RE1000 Wireless-N Range Extender (AMAZON) which is mounted in the house window facing the back yard. This works out better for us then USB WIFI Antenna did as it is good for many devices used at the same time. We sit out in our PATIO alot and bringing the tablets with us works great getting back to our house modem.
This just plugs into 120VAC and picks up the WIFI wireless signal from the house modem/router. Then it repeats the WIFI signal and makes it available for other devices usually around 100-feet away to access the house modem. Easy setup and has password protection etc...
I think I saw one of these at WALMART as well... We use AMAZON here for almost all of our electronic purchases...
Lots of things like this out there to help you out with your situation.
When in travel mode we bring along a Verizon MIFI unit with us that gives us a 3GB Dataplan Internet Connection anywhere VERIZON CELL PHONE signals work which is almost everywhere in the US. This connects up to five WIFI enabled devices we have with us. Computers, Tablets etc... Does not require anything from our CELLPHONEs...
Roy Ken
My Posts are IMHO based on my experiences - Words in CAPS does not mean I am shouting
Roy - Carolyn
RETIRED DOAF/DON/DOD/CONTR RADIO TECH (42yrs)
K9PHT (Since 1957) 146.52M
2010 F150, 5.4,3:73 Gears,SCab
2008 Starcraft 14RT EU2000i GEN
2005 Flagstaff 8528RESS