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UMTS/HSPA Module Series

UC20 Hardware Design

UC20_Hardware_Design Confidential / Released 54 / 82

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 GSM/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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