Rf Antenna Interface; Pin Definition Of The Rf Antenna Interface; Operating Frequency; Reference Design - Quectel AF20 Hardware Design

Table 12: Pin Definition of 32KHZ_IN
Pin Name Pin No.
32KHZ_IN 19

3.9. RF Antenna Interface

3.9.1. Pin Definition of the RF Antenna Interface

Table 13: Pin Definition of the RF Antenna Interface
Pin Name Pin No.
RF_ANT 30

3.9.2. Operating Frequency

Table 14: Operating Frequency of the Module
Feature
2.4 GHz Wi-Fi
5 GHz Wi-Fi
Bluetooth

3.9.3. Reference Design

AF20 module provides an RF antenna interface for antenna connection. A reference circuit design for RF
antenna interface is shown below. It is recommended to reserve a π-type matching circuit for better RF
performance, and the π-type matching components (C1, C2, R1) should be placed as close to the
antenna as possible. The capacitors are not mounted by default.
AF20_Hardware_Design
I/O Description
Used as a timer in low power modes.
DI External 32.768 kHz clock input is
required in sleep mode.
I/O Description
AIO Wi-Fi/Bluetooth antenna interface
Frequency
–
2.412 2.472
–
5.180 5.825
2.402–2.480
Wi-Fi&Bluetooth Module Series
Comment
1.8 V power domain.
If unused, keep this pin
open.
Comment
50 Ω impedance
Unit
GHz
GHz
GHz
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