UMTS/HSPA Module Series
UC20 Hardware Design
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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.
