Antenna efficiency on 5G modem RM500Q

Hi!

We are using the RM500Q 5G modem as a UE in the frequency band 3.7 GHz. The modem is part of an Open Air Interface 5G test bench exchanging with a gNB USRP 210. Our experimentation is to evaluate the ranging between the UE and gNb but the system is disconnected over 15 meters. The RM500Q has four antennas ANT0, 1, 2 ,3 . So i would like to know which antenna would be the most efficient for this band? According the user guide It seems that ANT1 working from 1.7 to 6 GHz is the most efficient does anyone could confirm on that ? What about other antennas should we disconnect them?
Thanks.
Thierry

Dear @Thierry
Please share your current firmware and which combination you used.