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Original question:

AWR1843: How does the data got by DCA1000 EVM is stored for 2Tx, 3Tx usage

AWR1843: How to select 2 azimuth antennas of AWR1843 in mmWave studio

Palguna Kumar Reddy Gopireddy
Prodigy 131 points
Part Number: AWR1843
Other Parts Discussed in Thread: AWR1642

Tool/software:

I am using DCA1000 to get data from AWR1843.

staticConfig tab of mmWave studio provides the option to select desired number of Tx and Rx in AWR1843.  AWR1843 layout shows the three Tx as Tx1, Tx2, Tx3 of which Tx1, Tx3 are azimuth Tx and Tx2 is elevation Tx.

But mmWave studio is showing three Tx as Tx0, Tx1, Tx2.

I am confused that which of the Tx0, Tx1, Tx2 of mmWave studio represents the azimuth Tx, which one represents the elevation Tx for AWR1843 device.

  • 0
    TI__Intellectual 981 points

    Hello, 

    Tx1,2,3 cover both azimuth and elevation planes and you could find the HFSS radiation patterns in the user's guide. Through the studio you can select which Tx channel to transmit with or perform calibrations etc. 

    Regards,

    Aydin

  • 0 in reply to Aydin Kiasat
    Prodigy 131 points

    Which user guide. I searched both AWR1843 and mmWave studio user guides for HFSS, there's no mention of HFSS.

    Perhaps, you did not understand the problem.

    In the training video DCA1000 Training Video | Video | TI.com, he used AWR1642, which has only two Tx. so, he selected Tx0, Tx1, which is obvious.

    But in AWR1843 has three Tx of which Tx1, Tx3 are azimuth and Tx2 is elevation. We can select the azimuth plane only by enabling Tx1, Tx3, disabling Tx2 in AWR1843.

    In mmWave studio the Tx are numbered as Tx0, Tx1, Tx2 (not numbered as Tx1, Tx2, Tx3 as in AWR1843). So, this is where it is causing confusion to select Tx0, Tx1 as azimuth antennas (or) Tx0, Tx2 as azimuth antennas.

  • +1 in reply to Palguna Kumar Reddy Gopireddy
    TI__Intellectual 981 points

    Referring to the user's guide that you were also looking at in the original post. In the next page of that (page12), Figure 11 and 12 shows the antenna pattern. Coming to the second point, antennas are designed to cover both azimuth and elevation angles, there are not separate antennas dedicated to each plane. I think you are confusing field of view with angular resolution. Tx2 will help in achieving higher angular resolution. I understand the naming between the user guide and the mmwave studio is not matching but, in this case, Tx0 from studio would correspond to Tx1. Tx1 from studio would be Tx2. Tx2 from the studio would be Tx3. 

    Regards,

    Aydin

  • +1 in reply to Aydin Kiasat
    Prodigy 131 points

    It cleared my problem. So, based on this I will select Tx0, Tx2 in mmWave studio to cover only azimuth plane

    But one thing I am not understanding is you told "there are not separate antennas dedicated to each plane."

    But As far as I know we can select two Tx only if we want azimuth plane and three Tx if we want both azimuth and elevation planes. This I got from the mmWave studio channelCfg discription. 

    Am I not correct?

     

  • +1 in reply to Palguna Kumar Reddy Gopireddy
    TI__Intellectual 981 points

    I will clarify a few points. You can select only TX0 or TX2 and still detect an object, however the resolution on the elevation plane will be poor but that does not mean the elevation is 0 degrees. If you select TX0 and TX1, that's when you will have a better resolution on the elevation plane but poor in azimuth. If you read the paragraph from the user guide you have attached in the original question, the degrees reported are when all the TX0, TX1, Tx2 are enabled. At the end, it depends on your application/use case and what you are trying to achieve. Hope this clarifies the doubts.  

    Regards,

    Aydin

  • 0 in reply to Aydin Kiasat
    Prodigy 131 points

    Thanks this resolved my doubts,

  • 0 in reply to Palguna Kumar Reddy Gopireddy
    TI__Intellectual 981 points

    Thanks Palguna. Glad it helped. I will close this thread for now and if any questions arise in the future, please reach out to us on E2E. 

    Regards,

    Aydin