Layout Guidelines - Quectel BG95 Series Hardware Design

Hot start
@open sky
Accuracy
CEP-50
(GNSS)
NOTES
1. Tracking sensitivity: the lowest GNSS signal value at the antenna port on which the module can keep
on positioning for 3 minutes.
2. Reacquisition sensitivity: the lowest GNSS signal value at the antenna port on which the module can
fix position again within 3 minutes after loss of lock.
3. Cold start sensitivity: the lowest GNSS signal value at the antenna port on which the module fixes
position within 3 minutes after executing cold start command.

4.3. Layout Guidelines

The following layout guidelines should be taken into account in customers designs.
Maximize the distance between GNSS antenna and main antenna.

 Digital circuits such as (U)SIM card, USB interface, camera module, display connector and SD card
should be kept away from the antennas.
 Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar
isolation and protection.
 Keep 50Ω characteristic impedance for the ANT_GNSS trace.
Please refer to Chapter 5 for GNSS antenna reference design and antenna installation information.
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