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LTE-A Module Series
EG18 Hardware Design
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4.3. Layout Guidelines
The following layout guideline
s 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, 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 the characteristic impedance for ANT_GNSS trace to
50Ω.
Please refer to
Chapter 5
for GNSS reference design and antenna installation.
Hot start
@open sky
Autonomous
3
s
XTRA enabled
2
s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
1.5
m