Omni- Antenna to make a wireless network

Can someone tell me if I can take my 15dbi Omni-Directional Outdoor Antenna , that I get my free wifi from a coffee shop down the street,,
to my home. I would like to know if there is away to run my cable from my antenna to a linksys router maybe with a cable into a cat 5 cable or something like that .... and have it send wireless net to the rest of my computers in my home all of them have wireless cards in them..

Or please tell me what I need to make my Omni-Directional Outdoor Antenna work off one computer and send wireless wifi to the rest of my computers please help thank you if you know a site that shows how to do any of this let me know Thank you . hdw