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TIDA-020047: AWR2243

Amine LTAIEF
Intellectual 545 points
Part Number: TIDA-020047
Other Parts Discussed in Thread: AWR2243,

Hello,

Regarding the reference design for AWR2243 cascading board TIDA-020047.

Why you placed the 1st TX of D2 radar at 1,5 d from the 3rd TX of D1 radar, in case of  increasing the number of virtual element antenna we have to place it at 2 d . am I right please?

Regards Amine

  • 0
    TI__Intellectual 1160 points

    Hi Amine,

    I am reaching out to the Engineer that specified the antenna design.  While I do that, are there any details that you can add to your question?  

    Thank you,

    Brian

  • 0
    TI__Intellectual 1160 points

    Hi Amine,

    The intent with keeping the two chips at ‘1.5 lambda’ separation was to have a virtual antenna location where two virtual antenna elements (one from each of the two devices) coincide. Ideally, if the system was correctly calibrated, the received signal (and the phase and amplitude of the signal in particular) at both the virtual antennas should be the same.

    Since this is a two chip cascade with two independently calibrated 2243s, it was seen that during operation, some events could cause the two chips to drift apart.
    The phase difference between the two virtual antenna elements would help re-calibrate the setup.

    Best Regards,

    Brian

  • 0 in reply to Brian Shaffer
    Intellectual 545 points

    Hi Brian,

    Thank you so much for your help.

    Regards