Any of these routers allow for dual radios?

I’m thinking connect to an existing wireless network using external 9dbi antennas but then have my local wireless network (to which I will connect device(s)) using internal antenna or a difference pair of external antenna, 2dbi ???

 

Is it possible to do this with any of these devices ?

Cheers.

My thinking is to use an existing wireless network as my internet connection but it’s a fairly low signal, hence wanting to use 9dbi external antenna to increase the range for that side.

BUT then I want a nice all-round localised wireless network to connect my devices to, such as the coverage pattern created by some nice omni-directional 2dbi antennas.

eg: see below link for coverage pictures.

http://www.wirelesshack.org/how-much-of-a-gain-does-a-9dbi-wifi-antenna-make-over-a-5dbi-antenna.html

You cannot use the antenna separately. Both antenna works the same.