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IWR1443: custom antennas for iwr1443

Gennadii Lichkov
Intellectual 930 points
Part Number: IWR1443

Hi,

I’m developing custom antennas for IWR1443 working in azimuth only. Antennas have more elements than IWR1443BOOST. Our antennas have increased side lobe level compared to IWR1443BOOST.
Could this be caused by TX phase calibration or other internal calibration intended for IWR1443BOOST?

Regards,

Gennadii

  • 0
    TI__Guru 50240 points

    Hi Gennadii,

    Our hardware expert is currently unavailable but we should have a response for you the week of 23 December.

     

     

    Cheers,

    Akash

  • 0 in reply to Akash Gondalia
    TI__Mastermind 25835 points

    Gennadii,

        It would be difficult to comment without reviewing the Antenna design. 

    However, Typically for suppressing the side-lobes tapered Antenna elements would be used in the series fed path array. If you use the same size/dimension path elements for all the antenna elements there could be increased side-lobe levels. 

    Have you performed Antenna simulations and have you noticed this in your Antenna simulations?

    Thanks and regards,

    CHETHAN KUMAR Y.B.

  • 0 in reply to CHETHAN KUMAR Y.B.
    Intellectual 930 points


    Hi Chethan,
    We have both tapered and untapered antennas. They have E plane diagram according simulation. But they all have increased side lobes in H plane in MIMO.

    Regards,
    Gennadii

  • 0 in reply to Gennadii Lichkov
    TI__Mastermind 25835 points

    Gennadii,

         Yes, side-lobes are generally gives troubles in H planes while designing series fed patch array antennas, Hence patch size optimization would be needed for the best side-lobe suppression. This is a optimization problem for the antenna design keeping constrains on the other factors in the antenna design such as Field of view, Radiation efficiency, Coupling, Bandwidth, and matching across frequency.

    Typically 3D EM simulators will have optimizer for the dimension of patch array, keeping constrains on other above factors. You may have to pick best optimized design to meet over all antenna performance. 

    Thanks and regards,

    CHETHAN KUMAR Y.B.