Setting up a temporary long-distance wifi for a science experiment

Good Day,

I am trying to do an experiment on Bell's Inequality, which is a part of Quantum Mechanics. In order to conduct the experiment we need to have two observation stations each several kilometers away from a sending station, with a stable internet connection between them.

We will have the sending station on the fourth floor of our building, and the receiving stations will be in opposite directions from the building. This is not a permanent set-up: we will assemble and align the receivers each time we wish to do a test, and then pack it up.

Currently I'm planning on using a D-Link DIR-655 (it has three removable antennas). I'm going to connect two of the antenna jacks to directional Yagis (WiFi Antenna | 14 Element WiFi Yagi Antenna), and point the Yagis in different directions towards the receivers. On each receiver ends I'm going to have another Yagi, which will be plugged into a Buffalo Technology WLICBG54HP wireless adapter which in turn is connected to a laptop.

Will this setup work? I'm worried about how the router will function. In order for a computer to connect does the computer need to be in range of all three antennas? Because obviously in my setup each computer would be in range of one only. D-Link does not seem to know the answer either.

If this setup will not work, could someone please recommend some alternate hardware? My budget is less than $500 Canadian, but other than that there are no hard restrictions. We'd like a range as long as possible, but don't have any real target range.

Thank you,
Peter

See the response by JL on alt.internet.wireless.
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