Hi,
I need to have a wireless system work with a range of 300 feet. I have a Linksys Wireless N router. What else (possibly external anntena?? ) do I need to be able to get this range? If it is antenna, what kind? I am looking for the cheapest thing that will work.
This is going from a system in a house to a laptop. The laptop needs to pick up the signal up to 300 feet.

Thanks,
Cory

This link contains some very good information and tips to accomplish your task.

10 Tips to Increase the Range of Your Wireless Network - Daily Wireless

Also, if you decide to go with an omnidirectional external antenna, please secure your wireless LAN (should be doing so anyway) or you could find yourself providing free Internet access to the neighborhood.

Do a Google search on the Cantenna. It is easy to make and will extend your wireless access significantly.

Here is one link: How to build a tin can waveguide antenna