Correct type to new Antenna to Orange Pi RV2

Hello friends, good morning!

I recently purchased an Orange Pi RV2 to set up a simple network gateway with a Wi-Fi hotspot. However, the included antenna is extremely limited and performs very poorly, so I want to replace it; the problem is that the documentation doesn't specify which type of IPEX connector the device uses, and—honestly—I don't have a caliper to measure it myself. It would be very helpful if this information were in the manual, but I’ve combed through all the official documentation and found nothing about it. If anyone could help me out—perhaps even by recommending a good antenna—I would be immensely grateful.

Thanks in advance to everyone for the help.