Rf Antenna Interfaces; Operating Frequency; Reference Design Of Rf Antenna Interfaces - Quectel AF51Y Hardware Design

3.10. RF Antenna Interfaces

Table 14: Pin Definition of RF Antenna Interfaces
Pin Name Pin No.
ANT_WIFI1 28
ANT_WIFI0 33
ANT_BT 25

3.10.1. Operating Frequency

Table 15: Operating Frequency of the Module
Feature
2.4 GHz WLAN
5 GHz WLAN
Bluetooth

3.10.2. Reference Design of RF Antenna Interfaces

AF51Y module provides three RF antenna interfaces for antenna connection. A reference circuit design
for an RF antenna interface is shown below.
It is recommended to reserve a π-type and notch matching circuit for better RF performance, and the
π-type matching components (C3, C4, and R1) and the notch (C1, C2, L1 and L2) should be placed as
close to the antenna as possible. The capacitors and inductors are not mounted by default.
AF51Y_Hardware_Design
I/O Description
Bluetooth and 2.4G & 5G WLAN antenna
AIO
interface 0
AIO 2.4G & 5G WLAN antenna interface 1
Reserved dedicated Bluetooth antenna
AIO
interface
Frequency
2.400–2.4835
5.150–5.850
2.402–2.480
Wi-Fi&Bluetooth Module Series
Comment
50 Ω impedance
50 Ω impedance
50 Ω impedance
Unit
GHz
GHz
GHz
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