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bouvy

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About bouvy

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  1. JIF, this seems to have done the trick. Thanks!
  2. Hi Torben, Yes, no issues running from CADFEKO. Thanks, Alex
  3. Hello, I am trying to run a batch script from the FEKO terminal. When doing so, I get the following error, and my job does not run: Where "vem-2" is the name of my PC. I have attached text files of both the job script and the complete output from the FEKO terminal. Any help is appreciated! Thanks, Alex job_script.txt job_script_response.txt
  4. Hello, I am using FEKO v2017.2. I am importing geometry from a .iges file. Upon importing, I would like to change the material to Copper from the FEKO library. I have changed all of the faces to "Default", but when changing the region material, I am unable to select metallic media. I have tried simply leaving the internal regions as free space and setting the faces to copper with a thickness greater than the penetration depth of the waves at the frequency I am using, but I receive the following warning: WARNING 2757: A triangle is too thick as compared to the lateral dimensions for application of the skin effect approximation See also message in the output file Alternately, I have tried setting the faces to "Default", and defining a dielectric material whose properties are identical to that of copper. In this case, the mesher hangs when I try to mesh the model and FEKO crashes. Any ideas on best course of action to take? My .cfx file is attached. Thanks, Alex 2019_01_02_AAV_loc1_halfloop.cfx
  5. Thanks a lot JIF, very helpful. I'll give this a try.
  6. Hello, I am using FEKO 2017. From POSTFEKO, I am exporting the surface current and get the .os file. I then import the .os file into MATLAB to do some processing. I would like to calculate the area of the mesh cell for which the current is given for each entry in the .os file. Is this data available within one of the headings of the .os file? I have looked through the user manual but can't find anything relevant. I've attached an example .os file at which I am looking. feko_surfacecurrent_f16.os Thanks, Alex
  7. Torben, I previously misunderstood your point about gain and directivity. When you said that directivity = gain, I took that the other way to mean that gain = directivity. I see now what you mean. I re-ran my simulation with a PEC ground plane with the following results: These are much more consistent with what I would expect. I do think it is a little misleading the FEKO refers to the "directivity" when a lossy material is used although that nomenclature is apparently inaccurate, if only the gain is being calculated. Regardless, thank you for your feedback. Very helpful!
  8. Thanks Torben. Unfortunately, I am unable to open the attached file, as I get the following Error 18008: "The file was written by a newer CADFEKO and is not compatible with this CADFEKO". I should have mentioned earlier that I am running FEKO version 7.0.1. I appreciate your remarks regarding the lambda/10 rule for the RCA. I was not aware of this requirement. Having learned that, I ran my original simulation using the exact Sommerfeld integral setting. In this case, I am observing the same problem as with the RCA: directivity values are very low. Do you have any suggestions for the case which includes the full model?
  9. Hi Torben, Thank you for the feedback. When you refer to the attached model, is that in reference to the model I attached? In that case, I am not sure how you are finding a maximum directivity of 2.49 dBi. When I plot the directivity on a polar plot, I obtain the following: which shows a maximum directivity of 0.253 dBi at 0.11 degrees. Am I misunderstanding something? Thanks again.
  10. Hi, I am currently simulating some antennas in the frequency range 3 to 30 MHz. When examining the far field results, it appears that the directivity values are too low. Because my simulation has a ground plane, the maximum directivity should be at least be twice that of an isotropic radiator, or 3 dBi. However, The maximum directivity that I am obtaining is around 0.25 dBi. In addition to this, the directivity is in other places very low (around -15 dBi). This would be okay by itself, but coupled with the low maximum directivity, this also does not make sense to me. Can you help? I have attached my project file and postFEKO file. My thoughts are that there are some settings within FEKO that I must have set incorrectly for this to be happening. I've had the same issue with other EM solvers, but cannot find the cause of this within FEKO. Thanks. 07_27_2018_AAV_SCD_WetSoil_GP_xdipole_11MHz_finemesh.cfx 07_27_2018_AAV_SCD_WetSoil_GP_xdipole_11MHz_finemesh.pfs
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