May I know is the antenna array a built in in 5340 DK or not? According to https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/samples/bluetooth/direction_finding_connectionless_rx/README.html, it shows that there is Nordic Semiconductor design 12 patch antenna matrix, but I can't find any information of that, is 5340 DK already has it? Thank you.
No, the nRF5340 DK (or any other DKs available at the moment) include an antenna array designed for Direction Finding. For more details on the antenna matrix please contact your regional sales manager. If you don't know who this is or don't have their contact information, please fill out our Sales Related questions form here.