Do the two rak3172 variants use the same pcb design?
Reason for question, supposing I build a carrier with a RP-SMA option, would I need to use some type of jumper? In other words, when using the IPEX variant, does it matter if there is a 50R impedance track on the RF pin?
The RAK3172 IPEX and non-IPEX variant has same PCB design.
It has 0201 jumper resistor that selects the path of the antenna.
With regards to 50R impedance path, any wire connected to RF out is considered to be a transmission line. I suggest you implemented same approach as we did and not mix up any unintended trace together. Just select one RF path.