Hello!
We are developing a board with NB-IoT connection base on the nRF9160 but also BLE capabilities based on the nRF52832.
While researching the best way to implement this technologies we came across the Ignion NN03-310 (TRIO mXTEND) antenna. We found out this antenna is being used on the Thingy:91, and while the nRF9160 on it uses it for both data conenction and GNSS positioning, the nRF52840 on the board uses a different antenna instead of also using the NN03, which has BLE possibilities. I understand that it would requer a impedance matching neetwork, but the Thingy already features RF switching for this porpouse (handeled by the MAGPIO of the nRF9160).
So, our question is: Would it be possible to use the NN03 antenna also for the nRF52840 and avoid the need for a BLE antenna? Are we missing something? Would we get lower range/efficiency? Our guess is that this design choice is derived from a SW standpoint to avoid interaction between the chips to share the antenna, or to be able to use data and BLE simultaneously.
