How to transmit a wireless signal over a distance?

Basically my house is on top of a hill with our families camp at the bottom. I would say they are about 250-300 yards apart and are in line of site.



We are looking to transmit our wireless signal from the house to the camp. Is this possible? What is needed to do it? And what kind of cost are we looking at?How to transmit a wireless signal over a distance?
You can use a high gain directional antenna such as: http://cgi.ebay.com/2-4Ghz-wifi-19dBi-hi鈥?/a>



With a directional antenna all of the broadcast/reception that used to be spread all around is concentrated in a single direction. Sort of like a flood light versus a spotlight.How to transmit a wireless signal over a distance?
Use an emitter.