ESP32-A1S Specification V2.3
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6. Design guide
6.1. Antenna layout requirements
（
1
）、
For the installation position on the motherboard, the following two methods are
recommended
：
Solution 1: Put the module on the edge of the main board, and the antenna area
extends out of the edge of the main board.
Solution 2: Put the module on the edge of the motherboard, and hollow out an area at
the antenna position on the edge of the motherboard.
（
2
）、
In order to meet the performance of the on-board antenna, it is forbidden to place
metal parts around the antenna, away from high-frequency components.
Figure 9 Schematic diagram of antenna layout
6.2. Power supply
（1）、Recommend 3.3V voltage, peak current above 500mA
（2）、It is recommended to use LDO for power supply; if DC-DC is used, the ripple is
recommended to be controlled within 30mV.
（3）、It is recommended to reserve the position of the dynamic response capacitor for
the DC-DC power supply circuit to optimize the output ripple when the load changes
greatly.
（4）、It is recommended to add ESD devices to the 3.3V power interface.
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