[ryao]

A directional antenna at the active wifi radio would enable longer range. One interesting application would be the ability to dogleg a wireless connection between points A and B where there is no LoS to each other, but both have LoS with point C. It would be a low throughput link, but it would allow for an awesome implementation of a private two way communications system. I.e. Several miles without direct LoS between the two end points.

[jasoncchild]

This is already a thing, however data rates tend to be slower

[jasoncchild]

Yeah but it's easier to pair down the antenna and underpower the radio than to go the other direction :)