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I am doing a project, which requires my using multiple antenna to obtain the CSI using raspberry pi, but I only got one CSI stream all the time, I just wondering how many built in antenna does pi 4B has for the Wi-Fi module?

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  • using multiple antenna to obtain the CSI... What exactly do you mean by this? Can you give more details on what exactly you want / need to achieve? Please update your question with this information.
    – Dirk
    Dec 14 '20 at 11:00
  • I mean using multiple antenna to form a MIMO system with my router, to capture Wi-Fi signal and extract channel statement information by using Nexmon CSI tool Dec 14 '20 at 13:50
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There's just one antenna, and AFAIK it is shared between WiFi and Bluetooth.

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