Trees, amplifiers & distance

[sdilley]

I am about 2 miles from a friendly ISP, but it is not Line-of-sight. We have some trees to contend with and no accessable high point that is LOS from both locations. I know Wi-Fi will pass through solid objects, with loss. and I know that there is some spread that allows the signal to "close-in" behind objects directly between the two antennas. With a uni-directional antenna plus amplification at both ends, do I have any real hope of covering two miles that are not line-of-sight?

Stan

[gvenditto]

I've read about a product from RadioLAN that covers 5 miles. Not sure about the line of sight issues --

http://www.isp-planet.com/fixed_wireless/equipment/2001/radiolan.html

[sdilley]

I appreciate the pointer, but I have two reservations; one is price, the cost would be $5,000 plus; the second is operating frequency which is over twice as high as the 2.4GHz used for 802.11b. Which makes it pure Line-of-sight.

I am looking more for the Pringles can approach, but I am willing to spend more than the price of a homebuilt for a solution that is robust. I don't know if the trees will be an absolute barrier or would attenuate the signal an acceptable amount. My RF knowledge is on much lower frequencies.

Does anyone know how to calculate attenuation from trees?