Quote:
Originally Posted by notinmybackyard
A directional antenna just won't be practical or even feasible because I would have to know who is going to be using it.
As for illegal,
Can something be modified to carry the required strength or can I order something from China?
Honestly I very much doubt that there are any black vans monitoring the airwaves in my city because they're just not that competent here. (In fact, both the government and workers tend to be absolute idiots)
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The black vans aren't going to be routinely patrolling for "illegal signals", but if your poor quality Chinese amplifier stomps all over the signals from your neighbour's wifi or DECT phones, and someone with half a clue reports the problem to an authority, you may end up with a black van visiting your area. These would be technical radio guys, not bored local city workers.
So yeah, not suggesting don't do it just because it's illegal, it's more that anything you shoehorn onto an AP to increase the range may end up impacting surrounding properties.
It may be possible to use multiple APs with slightly directional antennae to improve the range (say, four access points, with one of each antenna pointing N, E, W, S) but I don't think you'll be able to achieve anywhere near 1km range when the client end is limited to using standard wifi equipment. You would need repeaters located at several points.