User's Manual

MeiG hardware design guide
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Figure 4.38: Connecting Active Antennas
4.18.4 WiFi/BT antenna
The module provides the WiFi/BT antenna pin RF_WIFI/BT. The antenna on the user's motherboard
should be connected to the antenna pin of the module using a 50 ohm microstrip line or strip line.
In order to facilitate antenna debugging and certification testing, an RF connector and antenna
matching network should be added. The recommended circuit diagram is as follows:
Figure 4.39: WiFI_BT antenna interface connection circuit
In the figure, R301, C301, and C302 are antenna matching devices, and the specific component values
can be determined after the antenna factory debugs the antenna. Among them, R301 defaults to 0R,
C301 and C302 do not paste by default.
If there are fewer components between the antenna and the module output, or if the RF test head is not
needed in the design, the antenna matching circuit can be simplified as shown below: