Cavli Wireless C100QM - Diversity Antenna Interface; GNSS Interface

Cavli Wireless C100QM/C10QM Hardware Manual
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Figure 3-25 Main antenna matching circuit
3.17.2 Diversity antenna interface
C100QM/C10QM's 35-pin is a diversity antenna interface. To facilitate antenna
debugging, a π-type matching circuit needs to be added to the main board. The 50-ohm
impedance line is required. The main antenna and the diversity antenna need to maintain
a certain spacing. The recommended circuit is as follows:
Figure 3-26 Diversity Antenna Matching Circuit
3.17.3 GNSS interface
C100QM/C10QM's 47 feet are GNSS antenna interfaces, support GPS, BEIDOU,
GLONASS, GALILEO signal reception. If you need to use it, you need to open the GPS
with AT command AT+CGPS=1 (for details, please refer to C100QM/C10QM AT
command set manual) In order to facilitate the debugging of the antenna, it is necessary
to add a π-type matching circuit to the main board, and to take a 50-ohm impedance line.
The GNSS antenna needs to maintain a certain distance from the main antenna and the
diversity antenna. The GNSS antenna has two antenna connection modes, and the other