Gain and Directivity of an Array

AGirlHasNoName
AGirlHasNoName Altair Community Member
edited October 2020 in Community Q&A

Hello,

 

I am simulating a linear array of 25 dipoles with all the elements placed along the X-axis and oriented along the Z-axis. I did a Far Field Request such that theta varies from -90 deg to +90 deg and phi=0 deg. In POSTFEKO I can see that the directivity vs. theta plot is exactly same as the gain vs. theta plot. Why is this so? 

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Answers

  • Mel
    Mel Altair Community Member
    edited September 2019

    Hi Bidisha

     

    When the gain is calculated in Feko, it is calculated according to the IEEE definition where all losses are included,
    except for mismatch losses.     That from the user manual.

     

    For a single active source in the model, simply select Realised gain in the result palette of POSTFEKO.

    For multiple active sources, you must specify the reference impedance to calculate the realised gain from. This will be a single impedance setting for all sources set under Power settings. For example:

    power.jpg

    Then you would be able to select Realised gain in POSTFEKO for the array.

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