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Automotive Module Series
AG35 Hardware Design
AG35_Hardware_Design 85 / 129
For more details about RF layout, please refer to document [5].
5.2. GNSS Antenna Interface
The following tables show the pin definition and frequency specification of GNSS antenna interface.
Table 43: Pin Definition of GNSS Antenna Interface
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
119
AI
GNSS antenna interface
50Ω impedance
Table 44: GNSS Frequency
Type
Frequency
Unit
GPS
1575.42±1.023
MHz
GLONASS
1597.5~1605.8
MHz
Galileo
1575.42±2.046
MHz
BeiDou
1561.098±2.046
MHz
QZSS
1575.42
MHz
A reference design of GNSS antenna interface is shown as below.
GNSS
Antenna
VDD
Module
ANT_GNSS
47nH
10R
0.1uF
0R
NM NM
100pF
Figure 38: Reference Circuit of GNSS Antenna