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Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 101 / 118
Table 44: GNSS Frequency
6.3.1. Recommended Circuit for Passive Antenna
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 40: Reference Circuit Design for GNSS Passive Antenna
When the passive antenna is placed far away from the module (that is, the antenna 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.
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