PTP 820c - Possible to add another link using the same antenna to double throughput?

Products PTP
1

I read a comment somewhere someone claiming this is possible. Im wondering if its true. I am trying to find a solution to increase capacity on a 10mile link. We are tapping on 1gb currently on this tower and are going to upgrade to a 650mb license to buy some time.

2

check our 4x4 MIMO, using same channel and double the throughput.

http://community.cambiumnetworks.com/t5/Licensed-Microwave/what-is-MIMO-in-PTP820/m-p/36837?search-action-id=22524668783&search-result-uid=36837