2. Schematic Checklist and PCB Layout Design
2.2.1.2 Positioning a ESP32 Module on a Base Board
If users adopt on-board design, they should pay attention to the layout of the module on the base board. The inter-
ference of the base board on the module’s antenna performance should be reduced as much as possible.
It is recommended that the PCB antenna area of the module be placed outside the base board while the module
be put as close as possible to the edge of the base board so that the feed point of the antenna is closest to the
board.
Figure 12: ESP32 Module Antenna Position on Base Board
Note:
As is shown in Figure 12, the recommended position of ESP32 module on the base board should be:
• Position 3: Highly recommended;
• Position 4: Recommended;
• Position 1, 2, 5: Not recommended.
If the positions recommended are not suitable, please make sure that the module is not covered by any metal
shell. The antenna area of the module and the area 15 mm outside the antenna should be kept clean, (namely no
copper, routing, components on it) as shown in Figure 13:
Espressif Systems 10 ESP32 Hardware Design Guidelines V2.7
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