Layout Guideline - Quectel UC20 Manual

4.3. Layout Guideline

The following layout guideline should be taken into account in your design.
 Maximize the distance between the GNSS antenna and the main UMTS antenna.
 Noisy digital circuits such as the USIM card, USB interface, Camera module, Display connector and
SD card should be away from the antenna.
 Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar
isolation and protection.
Keep 50 ohm characteristic impedance of the ANT_GNSS trace.

Refer to chapter 5 for GNSS reference design and antenna consideration.
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