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IWR1443BOOST: I want to beamforming or make narrow Tx's beamwidth in mmwaveStudio

Kim JaeWook
Prodigy 140 points
Part Number: IWR1443BOOST
Other Parts Discussed in Thread: IWR1443, AWR1443

Hi, I'm Kim. 

now I want to make narrow Tx's beamwidth. 

so, I try to use this link, 

but' I notice this link tell about 68xx device. 

so I found other information

this link says, 

can't beamforming by iwr1443 :( 

anyway, question.

1. It is true that second link said, So iwr1443 can't beamforming or make narrow Tx's beamwidth?

if not, How can i do something for making narrow Tx's beamwidth?

2. I found Phase Shifter Tx0~2 (deg) in mmwavestudio 1.0.0.0 / if we can't make beamforming by iwr1443 in mmwave studio / what does that parameter mean?

now I'm feel hopeless so. please tell solution about that problems. 

If you know about this issue, please tell me ASAP. 

  • 0 in reply to Kim JaeWook
    TI__Mastermind 40335 points

    HI, Kim:

    You can give a try.  The 1443 data sheet only says that it does not support a per-chirp phase shifter.

    But it may support a per profile phase shifter.   

    But be aware that even with TX beamforming, the attenuation applied on the other angles will be like 10dB  and it is angle dependent (some angle will not see any attenuation from TX beamforming) , not very deep at all.   I would not call it beam narrower, we call it beam steering.  Because it steer the larger power on the desired angle, but it does not mean it will have no power from other angle or less power from all other angle.   

    Best,

    Zigang 

  • 0 in reply to zigang Yang
    Prodigy 140 points

    you say, IWR1443 can beamsteering by setting Phase Shifter Tx 0~2 in mmwavestudio ?? 

    if it is true, in my case, can I solve this issue(picture) by using Phase Shifter Tx 0 ~ 2

    How can i solve this situation by using beam steering and What figures should I put in the phase shifter Tx0~2

    (in this situation, I just want to 'narrow Tx's beam width', don't care of Tx's power change.)

  • 0 in reply to Kim JaeWook
    TI__Mastermind 40335 points

    HI, 

    It seems that you are not following my statement about TX beamforming is not TX beam narrower.  But anyway, you can give a try and find it yourself.   

    Please give more detailed explanation on what problem you are trying to resolve here. 

    You can program the phase to zero (which steering the beam to 0 degree) and enable two antenna at the same time. (note that based on the xwr1443 data sheet, you can not enable three antenna at the same time). 

    You can find the data sheet at: www.ti.com/.../awr1443

    Best,

    Zigang

  • 0 in reply to zigang Yang
    Prodigy 140 points

    in this case
    I want to Tx's beamsteering by setting mmwavestudio's Parameter=(Phase shift Tx0, 1)
    I know a equation about phase array this situation(picture)

    when i set my Tx's Phase by using mmwaveStudio, how many numbers do I need to enter for tx1's phase
    (I know that Tx0 needs to stay at 0 degrees).

    30 degree? or any other?

  • 0 in reply to Kim JaeWook
    TI__Mastermind 40335 points

    HI, Kim:

    Sorry just get confirmed from the team that xwr1443 does not support phase shifter.   The datasheet needs to be updated for AWR1443.  

    You can try this on xwr1843 board.  In the case of using xwr1843 booster antenna,  theta = 60 degree, d2 = lambda, and d3 = 2*lambda.

    Best,

    Zigang

  • 0 in reply to zigang Yang
    TI__Mastermind 40335 points

    But again, with xwr1443, you can still try 0 degree phase shifting, which will steering your beam to 0 degree (bore sight), and see whether it achieves your goal of narrow your beam.  

    Best,

    Zigang