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Discrepancy in far field calculation using specified labels versus all sources

Hello everyone,

I'm currently working on a project where I'm calculating far field results based on sources from elements with specified labels. This setting is configured in the far field settings under the scope tab. However, I've observed that the total of these field calculations does not correspond when I include all sources. For instance, I have divided a rectangular sheet into upper and lower sections. The combined far field values from these two segments do not align with the far field values calculated using all sources. I have attached a model example for reference.

Could someone please explain why there might be a discrepancy between these two results? I would appreciate any insights or suggestions on how to reconcile this difference.

Thank you!

Model.zip

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English

Feko

v2023.1

Accepted answers

Torben Voigt

Ji Joe,

You can add the complex E-field, see POSTFEKO.pfs which then should agree quite well. And maybe it would be better to use a finite groundplane to exclude the contribution of the infinite PEC. Note, your mesh is quite coarse.

In the attached zip you can see what I mean.

Best regards,
Torben

2024_06_25.zip

All comments

Torben Voigt

Ji Joe,

In the attached zip you can see what I mean.

Best regards,
Torben

2024_06_25.zip

Joe_21573

Thank you Torben.

I discovered that a finer mesh improves the agreement as well. The POSTFEKO.pfs is not compatible with my FEKO 2023.1 version, so I could not open it. Could you explain how you added the complex E-fields in POSTFEKO.

Best regards, Joe

Torben Voigt

Hi Joe,

sorry, sometimes I forget to look at the Feko version when working on a problem. Double-click opens Feko 2024 for me. I have now rebuilt the model in Feko 2023.1 and attached it here.

Hope this helps!

Best regards,
Torben

Feko_2023.zip