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IWR1642BOOST: What's the purpose of the parasitic array antennas?

David Ding
Prodigy 50 points

Hello,

What's the purpose of the parasitic array antennas marked by purple circles, which are connected to ground?

 

  • 0
    TI__Mastermind 37500 points
    Hello,
    The purple circles, diodes, are part of Built in Test / calibration / factory testing.
    They are not used during operational chip cycles.
    Regards,
    Joe Quintal
  • 0 in reply to Radio-Joe
    TI__Guru 58035 points
    Hello David,
    I am not sure if the image come through in your post , I am not able to see that. But if you are referring to the two antennas on both sides of the 4 receiver chain antennas , these are kept to reduce the mismatch between the 4 receive antennas. Since the center two antennas have copper on the sides while the other two have copper on only one of the side this causes slight gain/ phase mismatch and we have attempted to reduce it by putting these dummy copper elements. These are not mandatory to have.

    Regards,
    Vivek
  • 0 in reply to Vivek Dham
    Prodigy 50 points

    Hello Vivek,

    Got it, thank you very much!

    Best Regards,

    David