R52N with 1 antenna and 1 polarity on each side

Hello,

Is it possible to achieve more than 54mbits with 1 antenna and 1 polarity on each side. I mean I want to enable HT-extension but at the moment outside is snowing and i can’t mount another antennas on the roof. Is it going to raise my speeds.

At the moment i use :
2x RB433AH with 2xR52H Radios on 5ghz-turbo.

Distance is 5km with Clear line of sight and the throughput is around 30mbits (total).
I wonder if i use HT-extension with the 2 R52N cards that i have…can i reach higher throughput than these 30mbits.

I noticed that the R52N doesn’t have the original TURBO mode and before i try to change the cards i decided to ask you for your opinion.
Thanks in advance.