Sunsea AIoT SimCom SIM7090G User Manual page 52

NOTE
1. GNSS is closed by default and can be started by "AT+CGNSPWR=1". The AT command has two
parameters, the first is on/off, and the second is GNSS mode. Default mode is standalone mode. AGPS
mode needs more support from the mobile telecommunication network. Please refer to document [21]
for more details.
2. If the passive antenna is used, put the matching circuits close to the antenna.
3. Make sure there are no noise signals around GNSS antenna.
4.4 RF traces note
4.4.1 RF traces layout
Keep the RF trace from module ant pin to antenna as short as possible

RF trace should be 50 Ω either on the top layer or in the inner layer

RF trace should be avoided right angle and sharp angle.

Put enough GND via around RF traces.

RF trace should be far away from other high speed signal lines.

Figure 28: RF trace should be far away from other high speed signal lines
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