nRF9160 DK v0.8.5

Antenna interfaces

nRF9160 DK has three antenna interfaces mounted representing LTE, GPS, and the 2.4 GHz radio.

The LTE and 2.4 GHz RF signals are propagated through two coaxial connectors with switches that will disconnect the corresponding antenna from the radio if adapter cables are connected. This makes it possible to perform conducted measurements or attach external antennas to the radio.

The Global Positioning System (GPS) signal is RX only. There is a Low-Noise Amplifier (LNA) and a Band-Pass Filter (BPF) that amplify and filter the signal before it is fed to the GPS RF port on the nRF9160. Switch SW12 controls if the input signal to the LNA is connected to RF connector P29 or if the signal is routed from the GPS antenna A2 through switch U34. The LNA is connected to the GPS antenna by default.

The relation between the switches, radios, and antennas are the following:

For more details of the GPS antenna interface, see GPS.