Espressif ESP32­-S3 Series Hardware Design Manuallines page 19

3 PCB Layout Design
If the positions recommended are not feasible, please make sure that the module is not covered by any metal
shell. Besides, the clearance area outside the antenna should be kept clean (namely no copper, routing,
components on it) and as large as possible, as shown in Figure 14. If there is base board under the antenna area,
it is recommended to cut it off to minimize its impact on the antenna.
Unit: mm
: Clearance Area
Min15 Max 2
Base board
Figure 14: Keepout Zone for ESP32­S3 Module's Antenna on the Base Board
If the product is designed with a layout that does not meet the above rules, it is necessary to test the throughput
and communication distance of the whole product to ensure product performance. When designing an end
product, attention should be paid to the interference caused by the housing of the antenna and it is
recommended to carry out RF verification.
Espressif Systems 19
ESP32-S3 Series Hardware Design Guidelines v1.0
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