Drew Gibson wrote: > 600 ft is no problem with directional (yagi) antennae at each end. > Google for "cantenna" if you want to do it cheap. Take care with the > element spacing and they're just as good as commercial product. There's > an O'Reilly book on Wireless Hacks (by Rob Flickenger) which may be > useful. I've made Pringle's can antennae in the past with a gain around > 12dBi, though they get a bit sogy n the rain! :-)
I've found the cantenna's are much better (in terms of longevity and signal gain etc), I've managed to do 100k/sec over a 10Km link using only a pair of cantenna :) Mind you the reason the transfer speed was so slow is because it was going across a major airport with 120+ APs at the time. They're trivial to make I used to use 9-10cm fruit salad tins, grab an n-connector and then soldier a 4cm piece of coat hanger wire to the centre, and drill a suitable hole in the can about 4cm from the rear. Depending how accurate you make them and materials you use I usually found the gain was anywhere from 14 to 18dBi, add a satellite dish and use the can at the focal point and you can bump this over 25-30dBi without much effort. Anything beyond this starts being too directional or potentially illegal. -- Best regards, Duane http://www.cacert.org - Free Security Certificates http://www.nodedb.com - Think globally, network locally http://www.sydneywireless.com - Telecommunications Freedom http://e164.org - Because e164.arpa is a tax on VoIP "In the long run the pessimist may be proved right, but the optimist has a better time on the trip."
