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Mesh Operation Hfss

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21 Threads found on edaboard.com: Mesh Operation Hfss
This is a modeler error. hfss mesh can deal with it if you tell to skip modeler check going to: modeler/validation setting/ 135420
And possibly a way to get around it? A non-converging simulation typically means the mesh is not adequate. Assign an initial seed mesh ("mesh operation") to the cavity dielectric, and make sure it's relatively dense. This should speed up convergence.
Hi Faisel Tubbal, You have some fairly fine features in your antenna, and no seed mesh. Additionally, you are using the default analysis setup with only 8 passes. This is a bad combination - you need to make sure that your simulation is well converged. I think you have two options: 1) Specify a seed mesh around the small gaps to ensure they are a
hfss solves in frequency domain theoretically unrelated to the frequency scale. So it stacks in the mesh size. If I am not mistaken, technically it is limited by word precision (supposing they use 64bit processor PFU words) and machine accessible RAM size. I believe, it is from several Hz to optical region (depending on the problem size,
Better than running at coarse mesh, you can use the symmetry boundaries to cut your structure to a half or even to one quarter. Next option would be to add more RAM.
Considering the 100-kHz operation freq, which is quite low, it is most likely that the mesh is not good enough to accurately capture small features (e.g. 0.1-mm gap). A rule of thumb of checking the mesh for electrically small coils is to make sure that each arm of the most inner turn of the coil has been seperated into at least 2 cells.
1. When using solve inside, I would recommend adding a mesh seeding operation to "kick-start" the mesh in the conductor. Select the trace object, hfss > mesh operations > Assign > Inside Selection > Length Based. 2. Uncheck "Restrict length of elements" and Check "Restrict Number of (...)
I am new to hfss. I am doing a hfss design about graphene (0.34 nm) at 1 THz (3*10^5 nm wavelength). The layer is really small compared to the wavelength. The program just went wrong. But if I change the graphene thickness to 340 nm, which is 1000 times lager, the program will work. I don't know why. Is it because that the mesh setting is (...)
meshing is a time consuming action and reducing this precious time can cause a tremendous improvement in our field. I was wondering if it is possible to import initial mesh from another similar design and apply it to a new created design. is it possible? I am working on a SIW cavity backed antenna which is geometrically symmetric, but the radia
I've gone though the "UHF Probe" example in the hfss manual, and have have noticed something odd. In the tutorial it says "Far fields are calculated by integrating the fields on the radiatiuon surface. To obtain accurate far fields for antenna problems, the integration surface should be forced to have a lambda/6 to lambda/8 maximum tetrhedra
I cannot find a good explanation for the error "mesh leak is found for certain objects, do geometric repair on certain objects". The project I am working on has a significant amount of small objects. I am assuming that hfss is having a hard time meshing properly. I have already tried changing model resolution. Anyone have any suggestions.
hi, I am using hfss 12.1 and designing antenna but getting error everytime I want to simulate and the simulation terminates. the error says "Surface mesh is deformed too much on bodies: (Port 1)". Can anyone explain why is it so? Thanks
Hello, I want to limit the complexity of mesh used in my simulation, because it´s too high (about 200k-300k). I can do it defining a mesh operation and aplying it, but when the simulation starts this limit is not respected. Doy you know how to limit it? I tried using PML to decrease the size of the air volume around the (...)
i try to design a microstrip patch antenna with a trenches in substrate at 10 GHz and i assign a special mesh operation (element length 1mm) for the trench only and let the other objects in the design meshed with default scheme but i'm not sure that if this is wrong or true for having more accurate results can any one help me on (...)
The mesh plot is very useful to see if your structure's details and discontinuities are meshed small enough. Please note that the RF current typically flows at edges of metal, so mesh your edges well. This goes for your bow-tie also.
Hello, does somebody know which mesh type is to chose in hfss for plane structures? And if I have a radiation box which mesh type is to select for this. I have read that for round structures with surface approximation the result will meet fast the convergence criterion. And to decide whether the mesh is good the (...)
Hi all, I am using hfss 11.1. In hfss, it is possible to select a particular object and assign mesh operation, for example to limit number of mesh. Before we actually run the simulation, it is also possible to do "apply mesh operation" to see the initial (...)
Using "On selection" "Length Based" feature of the "Assign mesh operation" one can improve the meshing on the surface. Very nice feature, but the mesh is fairly equal on the whole surface (center and edges). What I would like to do is to improve the mesh on the edges of the surface (where current (...)
Hi all, What is exatly "seeding the radaition boundary to at least lambda/10" ? If I lick on the rad-boundary / right click/ Assign mesh operation / On Selection. Then: Length Based or Skin-Depth Based ? If Length Based, then: Maximum Length of Element: 600 mm ? (or something = lambda/10) ? Thank you for your help?
Have you tried defining a mesh operation->surface approximation on the object ? Itai
Hi, 27k unknowns are not big deal for hfss, i forgot the exact maxium number of unkonws for hfss. Take a look at the S-parameter of the convegence rate, it seems this structure is osilating, I have no preknowlege of this kind of structure, I can not tell which part is the most critical part, but you can try to put some dummy object in the critical