How to properly connect the antenna to NRF51822?

Question

Electronics

Greetings. I decided to switch from stm+bluetooth to nordic nRF51822-QFAA ( infocenter.nordicsemi.com/pdf/nRF51822_PS_v3.1.pdf) , I didn't work with this at all before and a couple of questions arose. Actually about connecting a ceramic antenna through a balun. As far as I understand, any 2.4Hz antenna can be used, the balun replaces all the little things 31 and 32 pins (ANT1 and ANT2) or not?
https://devzone.nordicsemi.com/question/94520/nrf5... here again it is written that you need to adhere to the reference arrangement of components (but there are no gerberas with a balun in the datasheet) and you need a pi-network to debug the antenna. In short, maybe someone had experience with this microcircuit, the nuances are interesting so as not to mess up. Will be very grateful for the tips in this difficult matter!

Answer 1

They would have bought a ready-made module with an antenna right away and would not have known problems with baluns and other things.
Or here's a link to the project -- https://oshpark.com/shared_projects/PV8yEdUh