Layout Guidelines - Quectel EG95-E Hardware Manual

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

4.3. Layout Guidelines

The following layout guidelines should be taken into account in customers' design.
Maximize the distance among GNSS antenna, main antenna and Rx-diversity antenna.

 Digital circuits such as (U)SIM card, USB interface, camera module and display connector 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 the characteristic impedance for ANT_GNSS trace as 50Ω.
Please refer to Chapter 5 for GNSS reference design and antenna installation information.
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