User's Manual

LTE Module BEC CBRS-12 User Manual
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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, 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 as 50Ω.
Please refer to Chapter 5 for GNSS reference design and antenna installation information.
Hot start
@open sky
Autonomous 3 s
XTRA enabled 2 s
Accuracy
(GNSS)
CEP-50
Autonomous
@open sky
1.5 m