Internal antenna keep out zone

Question: What do you mean by keep out zone ?

 
Answer: We recommend metal keep out areas for optimal range, for optimal antenna performance. The most you have metal near the antenna, the most the antenna behaviour will be degraded. The keep out antenna zone is important to get the maximum performance from the antenna. There is not specific rules regarding the distance between components and metal exclusion zone. Just respect an antenna keep out zone as indicated in the datasheet.