Hello,

Yes you can do it but it seems to me less interesting than exploiting the capacity of the Unifi management.

I explain, Unifi has a management console for all these devices and a Wi-fi transport mode that your router does not have and that you will not be able to manage by Unifi. Better to use your unifi device(s) with the Unifi server:
https://community.ubnt.com/t5...
Otherwise a simple Wi-fi relay will be sufficient and less expensive than a Unifi antenna.

Have a nice day.