Smart Module Series
SC200K_Series_Hardware_Design 77 / 105
ANT_MAIN
R1
0
Ω
C1
Module
Main
Antenna
NM
C2
NM
R2 0
Ω
C3
Diversity
Antenna
NM
C4
NM
ANT_DRX
Figure 34: Reference Circuit Design for Cellular Antennas
5.3. Wi-Fi/Bluetooth
5.3.1. Antenna Interface & Frequency Bands
The module provides a shared Wi-Fi and Bluetooth antenna interface ANT_WIFI/BT. The impedance of
the interface should be controlled to 50 Ω. You can connect external antennas such as PCB antenna,
sucker antenna and ceramic antenna to the module via the interface to achieve Wi-Fi and Bluetooth
functions.
The following tables describe the pin definition and frequency bands of Wi-Fi/Bluetooth interface.
Table 33: Pin Definition of Wi-Fi/Bluetooth Interface
To improve the receiving sensitivity, the distance between main antenna and diversity antenna should
be appropriate.
Pin Name
Pin No.
I/O
Description
Comment
ANT_WIFI/BT
77
AIO
Wi-Fi/Bluetooth antenna
interface
50 Ω impedance.
NOTE