Search found 1434 matches

by thorsten
Wed 31 Mar 2021, 21:47
Forum: Usage
Topic: How to make a lumped inductor?
Replies: 3
Views: 430

Re: How to make a lumped inductor?

I don't think that SMD inductors (with any reasonable value) do exist. Please correct me if I'm wrong. Theoretically something like this would be possible in a numerical tool but I would not see the point if it does not exist in the real world. As far as a matching network goes I recommend to use a ...
by thorsten
Wed 31 Mar 2021, 21:44
Forum: Usage
Topic: A Luneburg Lens fed by an aperture patch antenna
Replies: 6
Views: 1540

Re: A Luneburg Lens fed by an aperture patch antenna

I think these functions just plot what you feed in. Have a look at some of the antenna tutorials for more details and examples.

regards
Thorsten
by thorsten
Wed 31 Mar 2021, 21:42
Forum: Usage
Topic: Mesh alignment
Replies: 2
Views: 158

Re: Mesh alignment

Hi, I'm not really sure what you mean or what exactly the problem is, but the meshing will always have influence on the results and accuracy. Thus make sure to keep it constant during your investigations and refine it until the results converge. Otherwise I don't really know how to answer your quest...
by thorsten
Fri 12 Mar 2021, 23:22
Forum: Usage
Topic: Bent Patch Antenna
Replies: 2
Views: 380

Re: Bent Patch Antenna

Hi,

the example/tutorial shows the cylindrical mesh and how it can easily simulate a bent patch. But this means it does only work for everything that can be expressed in cylindrical coordinates.
That means no, a cone is not that simple...

regards
Thorsten
by thorsten
Thu 18 Feb 2021, 19:11
Forum: Usage
Topic: Strange behavior from rectangular waveguide
Replies: 6
Views: 2626

Re: Strange behavior from rectangular waveguide

I assume you have PML at the start and end? Can you try to make it PEC inside the PML and only finite kappa inside the "normal" domain? Maybe the PML does not behave well with high conductivity. As for -50dB vs -100dB: the mode matching is based on the analytical modes and therefore never matches 10...
by thorsten
Sun 14 Feb 2021, 20:57
Forum: Install
Topic: Python installation : fatal error: CSXCAD/ParameterObjects.h
Replies: 7
Views: 7799

Re: Python installation : fatal error: CSXCAD/ParameterObjects.h

Well the command looks fine to me. I assume the file "/opt/include/CSXCAD/ParameterObjects.h" is indeed available?
by thorsten
Sun 14 Feb 2021, 17:25
Forum: Feedback
Topic: Bug fix for Qt problem
Replies: 11
Views: 3695

Re: Bug fix for Qt problem

Hi there, can you try to change the qt.conf file in the openEMS folder? Adding the last line as below?: [Paths] Prefix = ./qt5 Plugins = ./qt5/plugins I'm a bit puzzled why Qt is unable to find it's plugins. Of course newer Octave versions cause this because they have changed/set this environment va...
by thorsten
Sat 06 Feb 2021, 14:02
Forum: Install
Topic: Installing on Fedora version 33 (Red Hat Enterprise Linux)
Replies: 1
Views: 455

Re: Installing on Fedora version 33 (Red Hat Enterprise Linux)

Hi, the openEMS GUI uses Qt and thus should be wayland capable in theory. Maybe your version was build against a too old version of Qt? But I have not tried it myself yet, maybe vtk and/or openGL is the issue... You should be able to start it on wayland using xwayland by using something like "-platf...
by thorsten
Sat 06 Feb 2021, 13:58
Forum: Install
Topic: Install OK on Windows but problem on Ubuntu
Replies: 2
Views: 657

Re: Install OK on Windows but problem on Ubuntu

Try to install the latest dev version. 0.0.35 is very old already:
https://github.com/thliebig/openEMS-Pro ... nd-install

The important part is the git clone of the master branch.
by thorsten
Wed 06 Jan 2021, 09:30
Forum: Usage
Topic: Papers on Rennigs timestep calculation ?
Replies: 2
Views: 1087

Re: Papers on Rennigs timestep calculation ?

I'm actually not sure if there is one. I worked with him closely and he developed/described this method in his PhD thesis. But the thesis is in german and was never published as pdf online. He always wanted to create more publications on this topic but I'm not sure that he ever did. Maybe you can wr...