AirM2M_ESP8266 WiFi module user manual V3.2
Shanghai AirM2M Communication Technology Co., Ltd
http://www.airm2m.com
Page 18
Picture 5
A650X module Pin Design
1.6.
WiFi antenna
A650X series modules support 3 kinds of antenna interfaces. They are onboard PCB antenna, IPEX
interface and stamp hole interface. Customers can use onboard PCB antenna and IPEX interface directly
without adding any matching circuit. Customers can use A650X stamp hole antenna interface if they want to
design antenna part on big board. In this case, matching circuit should be reserved on big board for this
design. For example:
Picture 6
WiFi radio frequency reference circuit
Note:
1
、
The parts inside the above dashed box need antenna matching. Should take actual electronic
parameters of the matching components of the antenna as standard.
2
、
Need 50 ohm resistance for RF wiring. 90 degree angle wiring is forbidden. No longer than 15mm.
1.7.
Recommended furnace temperature curve
Refer to IPC/JEDEC standard
；
Peak Temperature : <250°C
；
Number of Times: ≤2 times
；
