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mel last won the day on February 6

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About mel

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  1. mel

    Extracting data from FEKO to polar plot in MATLAB

    Thanks for letting everybody know!
  2. mel

    Extracting data from FEKO to polar plot in MATLAB

    Hi Barman Since there is nothing wrong in Feko, and you have the ASCII data file, I would suggest you contact Matlab support.
  3. mel

    A problem with FEKO version

    Hi Husam What you are referring to is "forwards compatibility" which of course is not supported. Old models will of course always open in newer versions (backwards compatibility). The only thing I can suggest is to import the *.fek file mesh into CADFEKO. But then you will have to reset the ports and quite likely any face settings that were e.g. dielectric or set to another method such as physical optics.
  4. Hi CIALT You should sample and use electric and magnetic fields. Using only 1 of the 2 fields, will cause the propagation direction (Poynting vector) to be in both directions. From the User Manual:
  5. Hi Elmien You are running parallel FEKO. Try local run only:
  6. mel

    Remote Processing Setup

    Hi dlh Have you tried using the same machines file for the parallel test when running while logged into a terminal directly on the remote host? Your previous output showed " Host key verification failed. This still shows something's up with the ssh setup. Please (1) send the debug output, but please use an example without continuous frequency (generates too much unnecessary output) - you can use a model from ExampleGuide model A02. And (2) send the machines file as well. Thanks
  7. mel

    Air Buffer for anisotropic FEM

    For isotropic materials FEKO has an already implemented radiation boundary condition on the surface of the FEM region. Surface elements on the FEM boundary are used to couple with the Method of Moments in a hybrid FEM/MoM solution. Or in a FEM only solution, an absorbing boundary condition is used. While it is theoretically possible to implement a radiation boundary condition for anisotropic FEM dielectrics, it is just not implemented in FEKO yet.
  8. mel

    Remote Processing Setup

    Hi dlh First try remote launching without using parallel. So please remove this part from your command -np 12 --machines-file C:\Users\user1\AppData\Roaming\feko\2018.0_caf82d78\machines.feko --parallel-authenticate default If the above works, then there is a problem with parallel on the remote machine. Confirm, by opening a terminal and logging in on the remote machine, that you can launch a parallel FEKO job there. If you still struggle, add the debug output here. You can add debug output by adding -d after runfeko, e.g. runfeko mymodel -d --remote-host
  9. mel

    Simulating an Impedance Transformer

    Hi SSachdeva The message indicates that you are exciting (or trying to receive at the 2nd port) the waveguide at a frequency where there is no propagating waveguide mode. Are you perhaps simulating over a too wide frequency range? Then your start frequency should be set just above the cut-off frequency
  10. mel

    Memory Error when solving with MLFMM

    Hi Villcent Some pointers: I noticed you are still using version 2018.0. Note that in version 2018.2 there have been improvements in memory savings (MPI3-SHM shared memory) You can also change the preconditioner to SPAI (Solver settings, Advanced tab in CADFEKO, Preconditioner). For RCS, you can relax the meshing. Try a Custom size of lam0/6.5. Mel
  11. mel

    Mesh doesn't show up in solution

    You can use the FEM current source which is applied on a FEM line port. The FEM line port is very similar to the wire port for voltage sources. You need a tetrahedral volume mesh to use FEM. Your existing mesh is a surface mesh.
  12. mel

    Mesh doesn't show up in solution

    You could try to remesh as Torben suggests, but with the small geometric details, I don't think you are going to reduce the memory to a practical level for your machine.
  13. mel

    Mesh doesn't show up in solution

    Unfortunately there's not much to do here. It is a surface mesh of many dielectric triangles. You should like into running this on a bigger computer, one with 1 TByte of RAM. The best solver for this application would be hybrid FEM/MoM, but then you would need to mesh the brain into tetrahedra. FEKO unfortunately cannot create a tetrahedral mesh from a surface mesh. You can view the concept behind the solution in the below videos: https://altairuniversity.com/learning-library/23068/ https://altairuniversity.com/learning-library/stacked-dielectric-resonator-antenna-2/
  14. mel

    Internal FEKO Error when solving with HOBF

    Hi Villcent There was a bug with the triangle normal determination for curvilinear triangles with the release version of FEKO 2018. It was fixed in updates to 2018. To avoid the error, try a slightly larger mesh. Set a custom size of 1.5e-4. Or don't use HOBF, but this will be more triangles - for RCS, you can easily get away with using the "Coarse" mesh setting. With the two planes of symmetry it should fit into memory on your system. Else update your FEKO installation.
  15. mel

    Mr Anupam

    Hi Anupam. This is the FEKO forum. Please post in the Winprop forum.