Hello,
I’m interested in the hardware of the nRF9160 and there’s something I can’t understand. According to Nordic Semiconductor’s “nRF9160 Antenna and RF Interface Guidelines (nWP-033)” documentation, the nRF9160 “has one Single-Ended (SE) 50 Ω antenna interface (ANT) for all supported bands”. The LTE antenna supplied with the nRF9160 Feather also has an impedance of 50 ohms. So I’m wondering about the reason for the matching circuit between the ANT output (for LTE) and the U.FL connector (C1, C2, L1). Does anyone know what it’s for?
Thank you in advance, have a nice day.