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IWR1443BOOST: Question about freq and antenna

Part Number: IWR1443BOOST

I'm demonstrating gesture using IWR1443BOOST and mmwave_industrial_toolbox_2_5_2. 

I have some questions about radar frequency and antenna. 

1) Regarding matlab script "plot_gesture_twirl.m" in "mmwave_industrial_toolbox_2_5_2\labs\lab0009-gesture-recog-twirl\gui", 

   how many gigahertz is used in the gesture demo? 

2) Why is used series-feed (resonant array) antenna on IWR1443BOOST, not parallel-feed antenna? 

   Is series-feed (resonant array) antenna suitable to measure angle? 

Please advise. 

Shoko 

  • Hello,

    Please find the answers for the below question.

    1) Regarding matlab script "plot_gesture_twirl.m" in "mmwave_industrial_toolbox_2_5_2\labs\lab0009-gesture-recog-twirl\gui",

    how many gigahertz is used in the gesture demo?
    [TI] It uses 4GHz bandwidth.

    2) Why is used series-feed (resonant array) antenna on IWR1443BOOST, not parallel-feed antenna?

    Is series-feed (resonant array) antenna suitable to measure angle?

    [TI] IWR1443BOOST EVM is general purpose EVM and it has wide variety of application. Here it has been re-purposed for the gesture application.
    Typically series fed 3 element antenna array provides wide FOV for azimuth and narrower elevation FOV as compared to azimuth FOV.
    And these could be used for longer range measurement applications. Higher gain in the elevation plane reduces ground clutter/reflections and hence provides higher distance capability. However for the gesture kind of applications for shorter distances antenna could be customized.
    For close in distances wide field of view, both Azimuth and Elevation would be most preferred.

    Thanks and regards,
    CHETHAN KUMAR Y.B.
  • Dear CHETHAN, 

    Thank you so much for your response about freq. and antenna of IWR1443BOOST. 

    I understand why IWR1443BOOST has series feed antennas.  

    May I ask one more question? 

    Is it operated by 77GHz and 4GHz bandwidth in the gesture demo? 

    Thank you for your cooperation. 

    Shoko

  • Hello,

    Yes, it's operates with the starting frequency of 77GHz with 100Mhz/us slope for 40 micro second which leads to 4GHz RF bandwidth.
    This is the right configuration to achieve best possible range resolution on this hardware.

    Thanks and regards,
    CHETHAN KUMAR Y.B.