That can help in one direction, but networks are bi-directional.
No matter how fancy and directive the antenna arrangement may be at the access point end, the other devices that use this access point will be using whatever they have for antennas.
The access point may be able to produce and/or receive one or many signals with arbitrarily-aimed, laser-like precision, but the client devices will still tend to radiate mostly-omnidirectionally -- to the access point, to eachother, and to the rest of the world around them.
The client devices will still hear eachother just fine and will back off when another one nearby is transmitting. The access point cannot help with this, no matter how fanciful it may be.
(Waiting for a clear-enough channel before transmitting is part of the 802.11 specification. That's the Carrier Sense part of CSMA/CA.)
No matter how fancy and directive the antenna arrangement may be at the access point end, the other devices that use this access point will be using whatever they have for antennas.
The access point may be able to produce and/or receive one or many signals with arbitrarily-aimed, laser-like precision, but the client devices will still tend to radiate mostly-omnidirectionally -- to the access point, to eachother, and to the rest of the world around them.
The client devices will still hear eachother just fine and will back off when another one nearby is transmitting. The access point cannot help with this, no matter how fanciful it may be.
(Waiting for a clear-enough channel before transmitting is part of the 802.11 specification. That's the Carrier Sense part of CSMA/CA.)