User's Manual

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7. Attentions for Antenna
Followings are attentions for on-board antenna.
1. Components and GND are not allowed to place in red zone below. It is suggested to be hollow.
2.
Metals should be far away from antenna, at lease 10mm away from the highest component.
3. Antenna can not be covered by metal shell.
4. Components are prefer to place in red zone below to reduce the impact to antenna.
Also you can ask for technical support about layout design.