Hi.
I’m currently looking into getting a KNOT Embedded LTE4 as a backup connection, and with that I want to get the antennas sorted out so I can order everything I need at once so I don’t end up with some half baked mess. I will be getting some sort of LTE compatible antenna and I was thinking about getting the MikroTik ACGPSA antenna for GPS (Mostly for some unrelated home lab testing with GPS, but I guess it might be useful for other things, for the price of that antenna I might as well get it anyway I feel.), but the 3rd antenna port labeled DIV is what I really are asking about, is it for just the BT connectivity or is it for something else and what antenna would be propper for the port? Would a standard 2.4GHz antenna work, or could I for an example get the MikroTik mANT LTE 5o antenna and connect one of the SMA ports to MAIN and the other to DIV on the KNOT to improve LTE connectivity?
The LTE devices often have two antennas due to diversity/polarization or so (= 2x2 MIMO, whici is mentioned in the specs)… Then it depends on particular device how it behaves - the KNOT has warning that it shall not be powered ON without connected MAIN antenna. That might indicate that it can somehow work with just one antenna. I am using it with mANT LTE 5o… not that big, not that small… The 2,4 GHz antennas might not be a good option as LTE spans overmuch wider band.
With that antenna, not far from BTS but indoor, I was able to reach around 95/28 Mbps DL/UL, and 30 ms response, which is around 65% of maximum speed. However, when i switch to eSIM and Mikrotik Connectivity, at the same spot, with the same operator, the performance drops to approx. 7/0,9 DL/UL and 140 ms response…. this doesn’t look good for Mikrotik Connectivity service….