Smart Module Series
SC606T Series Hardware Design
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Table 36: Pin Definition of GNSS Antenna
Table 37: GNSS Frequency
6.3.1. Reference Design for Passive Antenna
The GNSS antenna interface supports passive ceramic antennas and other types of passive antennas. A
reference circuit design is given below.
Passive
Antenna
Module
ANT_GNSS
NM
C1
C2
R1
C4
NM
0R
Figure 37: Reference Design for GNSS Passive Antenna
When the passive antenna is placed far away from the module and the trace is long, it is recommended to
add an external LNA circuit for better GNSS receiving performance, and the LNA should be placed close
to the antenna.
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
134
AI
GNSS antenna Interface
50
Ω impedance
GNSS_LNA_EN
202
DO
LNA enable control
For test purpose only.
If unused, keep it open.
Type
Frequency
Unit
GPS
1575.42 ±1.023
MHz
GLONASS
1597.5
–1605.8
MHz
BeiDou
1561.098 ±2.046
MHz
NOTE