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mgmv7

ERROR OCCURED WHILE PERFORMING NEAR FIELD REQUEST

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Hi @JIF !

 

I am trying to get electric field strength graph w.r.t to distance between two dipole antennas i.e how electric field varies from antenna 1 to antenna 2 while sweeping the distance . 

For this I have requested near field pattern . While doing that I could see " Error 17413: .\shared_helper.lua:108: An error occured while creating the models." , which Iam unable to trace .

 

My distance is from 1*lambda to 1e5*lambda . 

 

Could you help me in debugging the error ?

lossy.cfx

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Hi @mgmv7

 

Could you please upload the cfx file again? There seems to be a file attached to your post, but it shows "Unavailable".

 

What version of Feko are you using?

 

Kind regards

Madelé

 

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Thanks @MvdM for replying to my post . I am attaching the cfx file again lossy.cfx . FEKO version currently I am using is 2019.0.1. 

 

I could fix the problem  to some extent, when I am sweeping the distance from 10 to 1e4 m , with 2 samples . When I am trying to increase  the samples I could still get the same error . Worst part is post FEKO processing time , for two samples its taking 1-2 hours and merging files is stucking up at 60 % . Till now I am unable to view my result . Below I am attaching the FEKO result of a paper , which I am going to replicate it  but I got stuck up . 

 

I THINK THIS TIME YOU HAVE RECEIVED CFX FILE AND AN IMAGE (PNG FILE )

1475729474_ELECTRICFIELDSTRENGTH_FEKO.thumb.PNG.9b412c07ee28b01e303f141271da6587.PNG

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 Error 17413: .\shared_helper.lua:108: An error occured while creating the models

 

This error is given when model creation fails. Please make the same change to the model in the CADFEKO to see what is going wrong. For instance, if you change variable "d" to depend on lambda, applying the variable change would fail. The reason for the failure is that the near field request depends on this variable and integer values need to be entered for the number of field points. You could use "ceil(lambda)" for the variable or "ceil(d/5)" on the near field dialog to resolve this issue.

 

Quote

I could fix the problem  to some extent

Glad you found a way around the problem. I trust the explanation above helps to understand why it happened.

 

Quote

its taking 1-2 hours and merging files is stucking up at 60 %

I'm not sure if this is just due to the number of points. For d=1e4, with the near field request depending on this parameter, you have 10 million near field points.

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 I am sweeping the distance from 10 to 1e4 m , with 2 samples 

 

@mgmv7, which variable in the model lossy.cfx are you sweeping? Is "d" the distance variable? Note that the parameter sweep does not support sweeping variables that are used in result requests. If you are sweeping "d", it would be required to change the near field request not to depend on this variable.

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Hi @mgmv7

 

  • You may use the attached *.ffe file (FEKO far field result) of an isotropic radiator for an RX far field antenna:image.png.9b724f196c9eb5fa0d2144f1a41a974e.png
    The *.ffe file represents an antenna with 0dB Gain in any direction.
     
  • see above
     
  • similar to receiving antennas you can use *.ffe files for Far Field Point Sources:
    image.png.4c7ec3e68d573682820dc839af42d34b.png
     

You will also find examples in the ExamplGuide.pdf:

image.png.0eee0d266eb20f071d23ca7b263fbc1d.png

 

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