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Date:	Fri, 22 Nov 2019 11:05:41 -0500
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  This is amazing work!

           -Dave

On 11/21/19 5:09 PM, Evan Foss (evanfoss AT gmail DOT com) [via
geda-user AT delorie DOT com] wrote:
> 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.
>>


-- 
Dave McGuire, AK4HZ
New Kensington, PA

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