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AWR2944: Inquiry About Extending Detectable Range of AWR2944

Serhat Arslan
Intellectual 330 points
Part Number: AWR2944


Tool/software:

Hello Officer,

I hope you are doing well.

My goal is to extend the maximum detectable range to 500 meters using the AWR2944. I have seen that this can potentially be achieved by adding a low-noise amplifier (LNA) and a power amplifier (PA). I would like to know whether this approach is suitable for the radar front-end module of the AWR2944.

We have carefully selected the PA and LNA to ensure compatibility with the 71-86 GHz frequency range. Is there any way to predict the expected results when integrating an LNA and a PA? If this approach is appropriate, which aspects should I be particularly careful about?

You can find the features of the selected PA and LNA below. I would appreciate any further information you could provide on this topic. Any suggestions are welcome.

Power Amplifier: https://www.macom.com/products/product-detail/MAAP-011205 

Low Noise Amplifier: https://www.altumrf.com/products/arf1206l5/

I am looking forward to your reply. 

Best Regards, 

Mehmet Serhat Arslan

  • 0
    TI__Expert 6940 points

    Hello Mehmet,

    Thank you for your question.  Someone will respond to this ASAP.

    regards,

    Ali

  • 0 in reply to Ali Syed
    Intellectual 330 points

    Hello Ali, 

    Thank you for your interest. Is there any update regarding this topic? 

    Best Regards, 

    Mehmet Serhat Arslan

  • 0 in reply to Serhat Arslan
    TI__Expert 6940 points

    Hi Mehmet,

    I am gathering inputs from other experts on this topic.  Sorry for delay.  Thanks for your patience.

    regards,

    Ali

  • 0 in reply to Ali Syed
    TI__Expert 6940 points

    Hello Mehmet,

    This approach is theoretically possible.  You will have to ensure that receiver is not saturated, by programming the RX gain lineup appropriately.  Also, use back-off on the AWR2944 TX path to ensure that the external PA is not over-driven.  Some care has to be taken for PA layout so as to avoid TX-RX isolation issues as well as external-PA to internal VCO pulling effects.  

    And in this application, you are only expecting to detect long range? 

    regards,

    Ali

         

  • 0 in reply to Ali Syed
    Intellectual 330 points

    Hello Ali, 

    I really appreciate your effort and prompt response.

    We are indeed aiming to ensure proper TX-RX isolation and to prevent receiver saturation (as you mentined about these potential risk and effect) so that it won't negatively affect other components or internal circuitry of the AWR2944. However, we're currently stuck on how to simulate and accurately predict the potential effects, especially regarding interactions with the internal front-end components (PA, LNA, and VCO pulling). Specifically, we're unsure about how to model or simulate the radar front-end (analog front-end integrated within the AWR2944 chip) to anticipate these effects.

    Is there a way or recommended approach to model or approximate the internal radar front-end of the AWR2944, either through the use of provided reference models, simplified equivalent circuits, or other indirect simulation methods? Additionally, since we've already signed an NDA, could you provide simulation models or reference designs from TI to help us accurately simulate the AWR2944's internal front-end behavior?

    Also, regarding your question, the application is indeed intended solely for long-range detection.

    Any further guidance or suggestions you can provide to help us accurately foresee and mitigate potential risks would be greatly appreciated.

    Best Regards, 

    Mehmet Serhat Arslan

  • 0 in reply to Serhat Arslan
    TI__Expert 6940 points

    Hi,

    I am checking on whether such models are available and can be shared.

    regards,

    Ali

  • 0 in reply to Ali Syed
    TI__Expert 4170 points

    Hi Sehrat,

    Who is your contact person (Sales, Marketing or Field Application Engineer) from TI side that you are currently work with?  I need their name so I can securely share the HFSS model files

    Regards,
    Sami