Wi-Fi/Bluetooth; Antenna Interface & Frequency Bands - Quectel SC200K Series Instruction Manual

Figure 34: Reference Circuit Design for Cellular Antennas
NOTE
To improve the receiving sensitivity, the distance between main antenna and diversity antenna should
be appropriate.

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
Pin Name Pin No.
ANT_WIFI/BT 77
SC200K_Series_Hardware_Design
Module
R1
ANT_MAIN
C1
NM
ANT_DRX
C3
NM
I/O Description
Wi-Fi/Bluetooth antenna
AIO
interface
Main
Antenna
0 Ω
C2
NM
Diversity
Antenna
R2 0 Ω
C4
NM
Comment
50 Ω impedance.
Smart Module Series
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