Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 74 / 111
A reference circuit design for Wi-Fi/Bluetooth
antenna interface is shown as below. A π-type matching
circuit is recommended to be reserved for better RF performance. The capacitors are not mounted by
default and the resistor is 0
Ω.
ANT_WIFI/BT
R1 0R
C1
Module
NM
C2
NM
Figure 31: Reference Circuit Design for Wi-Fi/Bluetooth Antenna Interface
6.3. GNSS Antenna Interface
Table 38: Pin Definition of GNSS Antenna
Table 39: GNSS Frequencies
Type
Frequency
Unit
GPS
1575.42 ±1.023
MHz
GLONASS
1597.5
–1605.8
MHz
BeiDou
1561.098 ±2.046
MHz
Pin Name
Pin No.
I/O
Description
Comment
ANT_GNSS
121
AI
GNSS antenna interface
50
Ω impedance.