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From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Thu, 21 Nov 2019 22:09:16 +0000
Message-ID: <CAM2RGhT++rirvYwkNS+VCGqDBwrYu1WqEzY7m4ThYNNgF6fBHQ@mail.gmail.com>
Subject: [geda-user] Re: Microwave PCB layout simulation or How to eat all your processing
 power in 3 easy steps
To: gEDA users mailing list <geda-user AT delorie DOT com>
Content-Type: text/plain; charset="UTF-8"
Reply-To: geda-user AT delorie DOT com

Hi geda-user,

It's been a while since this thread happened. I just wanted to point
out that we built it.

Here is some documentation:
http://repo.hu/cgi-bin/pool.cgi?cmd=show&node=s_param
(i will write more later)

Here is the official announcement:
http://repo.hu/cgi-bin/web_mail_arch.cgi?mlist=pcb-rnd&cmd=show&id=3539

Some additional documentation will need to be written for things like
meshing, and more specific applications like signal integrity.

-Evan

On Fri, Aug 26, 2016 at 6:40 PM Evan Foss <evanfoss AT gmail DOT com> wrote:
>
> So a while back there was a thread titled "[geda-user] Wilkinson
> splitter - how to implement and use?"
>
> I *hated* that we didn't have a good answer for that. I spent a lot of
> time looking at FEM (finite element modeling). There are a lot of open
> source FEM solvers that are open source. Too many really because
> people keep writing new ones to full fill phd thesis requirements.
>
> The FEM we care about is called FDTD (finite-difference time-domain)
> aka Yee's method. I made a list of all of them. Removed the ones that
> are not maintained. Weighted them based on how close to our intended
> use case the projects were and bumped down ones that were basically
> only used by the universities who wrote them. It left 2 options. I
> really favor OpenEMS for a number of reasons. For one MEEP doesn't
> seem to have any kind of email list or forum and OpenEMS does. For
> another MEEP seems to mostly be used by people who are doing things
> like designing CCDs and other optics (hey John Dotty ever used this?).
> OpenEMS is mostly used by RF people and has examples done that use PCB
> layout.
>
> To see what I am excited about
> http://openems.de/index.php/Tutorial:_Microstrip_Notch_Filter
> http://openems.de/index.php/Tutorial:_Importing_with_hyp2mat#Calculating_the_step_response
>
> OpenEMS
> http://openems.de/start/index.php
>
> MEEP
> http://ab-initio.mit.edu/wiki/index.php/Meep
>
> PS: I looked for a Method Of Moments (mom) solver and there don't
> appear to be any which are open source and actively
> developed/maintained. NEC2 is nice but it is just free as in beer.
>