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IWR1443BOOST: What is the purpose of two unused RX antenna in the IWR1443 evaluation board?

Peter010
Genius 4165 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443

Hello everyone

On our IWR1443 board, instead of 4 Rx antenna, there are 6 RX antenna, 2 of them are grounded. Can you tell me what is the purpose of those 2 unused antenna? Is it for the mitigate the edge effect for the array?

Regards

Peter.