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Original question:

AWR1843BOOST: AWR1843Boost

AWR1843BOOST: Optimum design of hi-gain atenna

Erhan Onal
Prodigy 40 points
Part Number: AWR1843BOOST

I work on a high-gain antenna for AWR1843Boost. HFSS analysis run at 77GHz indicate fine results with a resonance frequency around 78.2GHz. 

If I run HFSS analysis at the resonant frequency of 78.2GHz, then S11 and VSWR plots remain unchanged, however the Gain plot, especially the elevation curve distorts considerably and both azimuth and elevation gains reduce.

   

While in the design process we take 77GHz as reference, however with some designs it is impossible to land on 77GHz as being the optimum (resonant) frequency.  If, I take 78GHz as reference while designing, then it is a far possibility to land on around 78GHz again. Is there any possibility to accomplish this in any other way?  Thank you.

Kind regards,

Erhan

  • 0
    TI__Guru*** 141444 points

    Hi,

    Our support team needs some time to check with design team

    We will get back to you next week

    thank you

    Cesar

  • 0
    TI__Expert 4010 points

    Hi Erhan,

    Your antenna gain plot will vary as you change frequency.  What I typically do in HFSS is I set up a discrete frequency sweep (under analysis) let's say from 76 GHz to 81 GHz in 1 GHz step.  This iay you can plot the far field antenna gain for all the frequency swept, and see how much gain variation you have across frequency.

    Regards,
    Sami