Specifications

WF-M38B-UWG1(FCC/IC)
IEEE 802.11a/b/g/n 2T2R USB WIFI Module&BT2.1+EDR/4.2/5.0
四川爱联科技股份有限公司
Sichuan AI-Link Technology Co.,Ltd. page 4 of 17
1. Introduction
WF-M38B-UWG1(FCC/IC) module design is based on Mediatek MT7638BUN solution, The
MT7638BUN is a
highly integrated single chip which has built in a 2x2 dual-band wireless LAN radio and Bluetooth radio.
It includes Bluetooth EDR and LE radio which complies with Bluetooth v2.1+EDR, v4.2, and v5.0.
The Module is a highly integrated MAC/BBP and 2.4/5GHz PA/LNA single chip which supports a
300Mbps PHY rate. The Module is designed to support standard-based features in the areas of
security, quality of service, and international regulations, giving end users the greatest performance
anytime and in any circumstance. This documentation describes the engineering requirements
specification.
1.1 RF module Overview
The general HW architecture for the module is shown in Figure 1. This WLAN Module design is based
on Mediatek MT7638BUN. It is a highly integrated single-chip MIMO(Multiple In Multiple Out) Wireless
LAN (WLAN) network interface controller complying with the 802.11 specification and Bluetooth over
USB interface. It combines a MAC, a 2T2R capable baseband, and RF in a single chip. An intelligent Wi-
Fi/Bluetooth coexistence algorithm is implemented to provide the best harmonized Wi-Fi and Bluetooth
radio performance.
5V
1.5V
2.4G TX0/RX0
1.2V
5G TX0/RX0
USB2.0 Interface
2.4G TX1/RX1
5G TX1/RX1
2.4G TX2/RX2 Filter
Figure 1 WF-M38B-UWG1(FCC/IC) Block Diagram
MT7638BU
N
Dixplexer
Dixplexer
Antenna0
Antenna1
40MHz
Internal
LDO
Internal
DC/DC
Antenna2
WF_
RFIO
WF_
RFIO
BT_
RFIO
Filter