I'm looking a bluetooth modules for a project i'm working on. I want to have a small form factor version of the board be usable with a trace or chip antenna, and have the option of connecting a external antenna for better performance if need be.
This is at odds with things like Nordic's nRF52 dev kit which has both a trace and IPEX/u.FL connector available at all times (see picture).
What is the reason for this? I can only assume that this is due to performance considerations but i'm not sure. Ideally, like the dev kit, I want both connections to avoid soldering to make my selection.