I would like to extend the range of an omnidirectional WiFi router (e.g. this one) in one direction.
Is it possible to connect a 2.4 GHz directional antenna (e.g. this one) to the router, by disconnecting one of the omnidirectional antennas and replacing it with the directional antenna?
What I'm looking for is a point to point long distance (over 20 miles) connection and a multi-points access in a radius of 100 feet around the router. Everything must be connected to the same network.
That antenna is for point to point connections, up to a couple miles. It creates a tightly focused beam pattern that isn't going to help you in a home/soho scenario. The general rule for wifi antennas: the higher the dbi rating, the more directional the radiation pattern.
I wouldn't recommend taking out an antenna from the phase array and using a directional in its place. These routers already use semi directional antennas for beamforming. A better option is to enable beamforming in the configuration. If you don't see a significant improvement from beamforming it most likely means your client devices do not support it, and your best option would be to upgrade your client side wireless cards/adapters.
If you haven't done so already, take some time to figure out what channels in the 2.4ghz band have the least interference, and what channels in the 5Ghz band are not in use. Just doing this should significantly improve reception.
