For Nordic Thingy:91™ v1.0.0, the Global Positioning System (GPS) signals are propagated through a coaxial connector located between the antenna and the Low-Noise Amplifier (LNA).
The coaxial connector makes it possible to attach external antennas. The connector is of SWF type (Murata part no. MM8130-2600) with an internal switch. An adapter is available (Murata part no. MXHS83QE3000) with a standard SMA connection on the other end for connecting instruments. The adapter is not included in the kit. The insertion loss in the adapter cable is approximately 0.5–1 dB.
The LNA enable signal is controlled by the logic circuitry. It is enabled only when the antenna tuning circuitry is set to operate at the GPS frequency band. The LNA makes the GPS receiver more sensitive to GPS signals and less sensitive to interference from other sources nearby.
