Am Mo, 29.05.2006, 19:36, schrieb TelecodocusOOo:
> In regard the stage 2 of the roadmap,
> while preparing slides for a short course about free software in
> electronic engineering, I have found a GPL EM simulator able to analyze
> 3D structures, planar structures and even antennas. It is based on the
> well-known Transmission Line Matrix (TLM) method and its name is YATPAC
> (www.yatpac.org). Other EM simulator but I thinks most targeted to
> periodic structures is MEEP
> (http://ab-initio.mit.edu/wiki/index.php/Main_Page), that is based on
> the (Finite Differences - Time Domain (FDTD) method and has no GUI. I
> have also found several finite element method (FEM) simulators, but
> almost all are targeted to mechanical or flow dynamics simulations,
> although as commented in a recent forum post some of them can be
> customized to solve electromagnetic problems.
> * Freefem3D (GPL) http://www.freefem.org/
> * Salome (LGPL) + code_aster (GPL)
> http://www.salome-platform.org/home/presentation/overview/ and
> * Openfem (LGPL) http://www-rocq.inria.fr/OpenFEM/Old/index.html
> * FELT (GPL) http://felt.sourceforge.net/
> * GetFEM++ (LGPL) http://www-gmm.insa-toulouse.fr/getfem/getfem_intro
> Apart of to choose what EM simulator to use, I think that first of all
> it should be defined how the EM simulator should be integrated into
> Qucs. I think a good approach could be to place a black box (with the
> name of the file containing the external EM simulator model and the
> simulator to use) in the Qucs schematic. So, when running the
> simulation, first the black box is solved, and the response is used to
> solve the entire circuit. Thinks to take into account are:
> - Show the EM simulation log, and if ti fails do not solve the entire
> - The ability to "edit" the black box, so an EM simulator GUI is called
> and the EM model loaded.
> What do you think about the software proposed? Any more
> ideas/suggestions? Any Qucs developer guide to made things easy to
> newbie developers?
Thanks for the internet-search about free EM simulators. We can surely
use this information. Though the integration of such a simulator is not
planned in the near future you could help to keep the issue alive by:
* evaluating the software you found:
- what are advantages/disadvantages of them?
* clarify which EM simulator can perform which tasks and outline what
they can be used for exactly
When we wrote the EM simulator we had the following in mind (as an
example): The simulator should be used for simulation of arbitrary 3D-
structures and should output the S-parameters of ports which you can
additionally define in the 3D-model. The simulator itself should be
(preferable) a command line driven one. Thus the GUI can be either done
by ourselves or we could also use any other (probably the EM simulator
project has already one) (free) CAD package...
Parametric (geometry parameters) analysis could also be useful.
> Thanks to all for this great piece of software. Regards.
Thanks for trying Qucs,