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IWR2243: Comparing xWR2243 (4Tx/4Rx) vs. xWR1843AOP (3Tx/4Rx AoP) – Key Considerations

Abdussamad Mohammed
Prodigy 50 points
Part Number: IWR2243
Other Parts Discussed in Thread: AWR2944, AWR2944EVM

Tool/software:

Hi everyone,

I noticed that the mmWave Sensing Estimator doesn’t include boards like the xWR2243, which has a 4Tx/4Rx antenna configuration. I’m looking to compare its performance with the xWR1843AOP, which features an Antenna-on-Package (AoP) design but has only 3Tx and 4Rx antennas.

Some key questions I have:

  1. Antenna Configuration: Does the additional transmitting antenna on the xWR2243 provide a significant advantage over the xWR1843AOP’s AoP design?
  2. Transmitted Power & Noise Figure: The AoP design of the xWR1843AOP benefits from increased transmitted power and a lower noise figure—does this compensate for having only 3 transmitting antennas instead of 4?
  3. Field of View & Resolution: How do these differences in antenna design affect angular resolution, field of view, and overall sensing capability?
  4. Other Considerations: Are there any additional factors I should keep in mind when making this comparison?

I’d appreciate any insights from those who have experience with these boards.

Thanks!

  • 0
    TI__Guru*** 147894 points

    Hi,

    I think you are comparing wrong devices. 

    What is the application you are interested in?

    Thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 50 points

    I'm interested in the detection of small foreign objects. That's why Transmission power and SNR are important factors in my device of choice

  • 0 in reply to Abdussamad Mohammed
    TI__Guru*** 147894 points

    Our team is not familiar with this use case.

    I think the device you could consider is awr2944.

    Thank you

    Cesar

  • 0 in reply to Cesar
    Prodigy 50 points

    thanks for the answer, but if you don't mind, could you give me some insight as to why you think the awr2944 would be the better choice here?

    Regards,

    Abdussamad

  • 0 in reply to Abdussamad Mohammed
    TI__Intellectual 2502 points

    Hi Abdussamad,

    I'm interested in the detection of small foreign objects.

    Could you provide some more details about the use case?

    • What is the required detection range?
    • Could you specify the sizes of the foreign objects that need to be discussed?
    • What is the required field of view? Is elevation FoV also required?

    Thank you,

    Jin

  • 0 in reply to Jin Lee
    Prodigy 50 points

    Hi Jin,

    We're trying to see what the realistic requirements are for the radar capabilities, but what we're looking to achieve is a detection range of about 25m and objects of 1 to 3 cm in length and width.

    Although we would still like to have a respectable FoV, it's not of critical importance as the radar is going to be moving anyways.

    We're aware that these requirements are hard to achieve so that's why we're looking for the device that would give the performance closest to our requirements

    Thanks,

    Abdussamad

  • 0 in reply to Abdussamad Mohammed
    TI__Intellectual 2502 points

    Hi Abdussamad, 

    Thanks for providing these details. 1-3cm will be extremely challenging for any mmWave radar to detect and distinguish from the environment. 

    For reference, a human can be reasonably detect from up to ~60m away. For automotive usecases, vehicles can be detected much further away, >200m, with our highest performance devices. However, the cross-section of these objects are much greater than that of an object with 1-3m length/width. 

    We suggest trying out the AWR2944EVM for its high RF performance and channel count (and therefore higher angular resolution), as well as the SW resources available for quick evaluation, but note that radar may not be the right sensing modality for your application.