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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:	Wed, 31 Aug 2016 12:45:37 -0400
Message-ID:	<CAM2RGhQHNAPUbDhjg24rE4cpMd-Vy_eSHpb1mpM6GY8z8=9tEg@mail.gmail.com>
Subject:	Re: [geda-user] 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>
Reply-To:	geda-user AT delorie DOT com
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On Wed, Aug 31, 2016 at 2:10 AM, Larry Doolittle
<ldoolitt AT recycle DOT lbl DOT gov> wrote:
> Evan -
>
> On Wed, Aug 31, 2016 at 04:26:05AM +0000, Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com] wrote:
>> On Wed, Aug 31, 2016 at 4:16 AM, Larry Doolittle
>> <ldoolitt AT recycle DOT lbl DOT gov> wrote:
>> > Crosstalk, VSWR of microwave circuits and high-speed serial routing.
>> > They are hard problems.  Even with ideal software, getting good data on
>> > a PCB process can be tough.  Lots of people make test boards for their own use,
>> > and then hope (and check) that the manufacturer doesn't change the process.
>> Ok. Do you have a background with FEM and do you think it is worth pursuing?
>
> Yes, some background.  Urmel, Superfish, meep, S parameters,
> waveguides, series solutions.

Ok cool. Meep was my 2nd choice. OpenEMS had more stuff related to
what I expected users here to want though. (plus it didn't use scheme)

What was your impression working with meep? Why did you choose it? How
hard was it to validate it's output?

> Worth pursuing, yes.  I can't promise much time of my own.

I understand. I just want to find someone with a deeper understanding
of this than me. I work with a bunch of guys who are heavy FEM people
but they are all doing mechanical stuff. The boundary conditions,
constraints and etc are all wildly different.

> And I recommend trying to keep expectations low, at least at first.

Because it is hard to get things going or because it is very easy with
FEM to make fancy graphs and etc that look cool/right but are horribly
wrong?

>   - Larry

Evan

-- 
Home
http://evanfoss.googlepages.com/
Work
http://forge.abcd.harvard.edu/gf/project/epl_engineering/wiki/

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