Espressif Systems ESP32-C3 Series Hardware Design Manuallines page 19

3 PCB Layout Design
Note:
In Figure 12, the recommended position of ESP32-C3 modules (feed point on the right) on the base board should be:
• Position 3, 4: Highly recommended;
• Position 1, 2, 5: Not recommended.
In Figure 13, the recommended position of ESP32-C3 modules (feed point on the left) on the base board should be:
• Position 1, 5: Highly recommended;
• Position 2, 3, 4: Not recommended.
If the positions recommended are not feasible, please make sure that the module is not covered by any metal
shell. Besides, 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 14.
Figure 14: Keepout Zone for ESP32­C3 Module's Antenna on the Base Board
If there is base board under the antenna area, it is recommended to cut it off to minimize its impact on the
antenna. When designing an end product, pay attention to the impact of enclosure on the antenna.
Espressif Systems
Unit: mm
: Clearance Area
Min15
Base board
18
Submit Documentation Feedback
Min15
ESP32-C3 Family Hardware Design Guidelines V0.5