said by Barns:100-150 metres through foliage in a tropical rainforest?
lol
Sorry, but maybe you should consider running a cable or renting a bulldozer. I've never been in a tropical rainforest myself, but I'm imagining something a little denser than your standard leafy obstruction.
Wireless through leaves, while not impossible, can be an exercise in frustration. If you have no alternative and don't mind taking a risk, then get yourself the highest gain antennas and radios you can find. The Ubiquiti Rocket dish is the highest combo that I know of.