Router Antennas

[Anupam]

Hi,

I bought TP-Link N600 3600 router.
It has two extrenal antennas both having gain as 5 DB.

I have two extra antennas having 9 DB again. Now my question is

Can I use one 5 DB antenna and One 9 DB antenna? What could be the problem?

I understand 9 DB will give you more horizontal coverage and 5 DB will give better vertical coverage. So if I use two different DB antenna will that cover both horizontal and vertical better?

Or should I use both same DB antennas?

 

[viktik]

Why not use two 9 Db antenna.

 

[Anupam]

Why not use two 9 Db antenna.

I already mentioned the reason

"I understand 9 DB will give you more horizontal coverage and 5 DB will give better vertical coverage. So if I use two different DB antenna will that cover both horizontal and vertical better? "