[SI-LIST] Re: about golden standard
- From: walter steffe <w.steffe@xxxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 9 Feb 2005 11:46:13 +0100
Dan
Thanks for your interest
At the moment what I can say about my approach in solving EM problems
is that it is unique in two ways:
1) It is hierarchical
2) It goes directly to a Spice model without going trough the computation=
of
the electrical responce (let it be in time or frequency domain).
My code operates on a geometry that is partitioned in a set of subvolumes=
but
the situation is quite different from Finite Elements because here the
subvolumes are much larger and more complex. Indeed each volume is define=
d by
its meshed boundary. For very simple problems you can even use just a sin=
gle
subvolume but the subdivision becomes necesary when you have different
materials because each subvolume must be omogeneus.
Each subvolume is characterized by an equivalent circuit (made of discret=
e
inductances, capacities that are coupled by constant generaors) whose inp=
ut
ports are associated with a set of modes that are defined on the subvolum=
e
boundary (the surrounding shell). The computation of the equivalent circu=
its
associated with the different subvolumes are independent tasks and can be
done in parallel. All these subcircuits are then coupled togheter (using =
some
additional generators) to form the global circuit.
At the momont I am working on the routine which compute the equivalent
circuit of a given volume and the first results confirms the theory. I n=
eed
some more time (e few months) to finalize this task. Then I will start t=
o
develope the code needed for the connection of the subcircuits but I thi=
nk
that this is the easier part.
Of course I am very interested to get in touch with companies which can
benefit of the results of my work. I am employed at the antenna departmen=
t of
Alenia Spazio and I think that my method can have interesting application=
in
this evironment (antennas and correlated passive components) but I am
convinced that I could find a much broader audience in the electronic
industry.
Sincerely
walter
On Tuesday 08 February 2005 18:19, you wrote:
> Walter,
>
> That's quite all right. Communication on the SI list gets a bit confus=
ing
> at times.
>
> We will be performing tests and simulations on a continual basis and wi=
ll
> always be very glad to answer any questions you may have. Noone can go=
it
> alone and we all can learn something from someone else. That's our
> motivation with the standard. Please feel free to write to us whenever=
you
> have questions or information to provide us from your solver. We would
> greatly appreciate it and we could consider putting some of your result=
s
> with ours.
>
> Good luck on your endeavor!
>
> Hope the weather is nice over there. :)
>
> Sincerely,
> Dan
>
> -----Original Message-----
> From: walter steffe [mailto:w.steffe@xxxxxxxxxxxxxxxxx]
> Sent: Tuesday, February 08, 2005 12:30 PM
> To: Dan Piscotty
> Subject: Re: [SI-LIST] about golden standard
>
> Sorry, just after having sent my message I have realized that Nicklas w=
as
> simply asking about the Golden Standard and was not the person who did =
it.
>
> I am interested in your standard because I am developing a new EM solve=
r.
> The code is not yet ready (it will be before the end of the year) and, =
at
> that
> time I will need a set of test cases to validate it. Therefore I am ver=
y
> interested in real problems which have some relevance for the design of
> commercial products and this is the reason why I am following the si-li=
st.
> I
>
> have a certain experience with the numerical methodes for solving EM
> problems
> but I need a better understanding of the possible applications of my co=
de
> within the design of electronic products. The si-list forum and papers =
like
> yours are very helpfull to me and I will follow with a great interest t=
he
> all
> results you are going to post. Of course the most important goal in my =
mind
> is to find cases where my code (which is based on a new method) can
> demonstrate a great advantage over the competition.
>
> Thanks
> Walter Steffe
> Alenia Spazio, Italy
>
> On Tuesday 08 February 2005 17:18, you wrote:
> > Walter,
> >
> > I'm not sure who Nicklas is but I'm one of the authors of the Golden
> > Standard paper.
> >
> > Section 1.4 only talks about the theory. Section 1.5 is the beginnin=
g of
> > the simulated results. I make reference to a "SPICE simulator" and m=
aybe
>
> I
>
> > should have been more clear on that. It certainly wasn't meant to
> > confuse or mislead. We used Hspice for simulation for all of our mod=
els.
> >
> > Our goal was to take all of our software packages in house and genera=
te
> > as many possible models in every possible way. We would take these
> > models
>
> and
>
> > run them through Hspice to generate results. We consider all of the
>
> Hspice
>
> > results to be our simulated results and will be posting these results=
on
> > our website in the up an coming weeks. It will provide a table that =
will
> > show all the results of the various models and talk a bit about why t=
he
> > inconsistencies occur. This is also the point where we hope everyone
> > will join in the discussion and add their results. That's the real g=
oal.
> >
> > Regards,
> > Dan Piscotty
> > Samtec
> > www.samtec.com
> >
> >
> >
> >
> >
> >
> >
> > -----Original Message-----
> > From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxx=
rg]
>
> On
>
> > Behalf Of walter steffe
> > Sent: Tuesday, February 08, 2005 6:54 AM
> > To: si-list@xxxxxxxxxxxxx
> > Subject: [SI-LIST] about golden standard
> >
> > This message is for Nicklas who posted the papers on the Golden Stand=
ard.
> > I have just subscribed to the si-list and I have not yet understood h=
ow
> > to address a replay to a previous message.
> >
> > I have read the part 2 of the golden standard paper which explains th=
e
> > theory behind the proposed test kit and gives some comparison between=
the
> > analytical, simulated and measured curves. It is not clear to me what=
are
> >
> > exactly the simulated ones. I have understood that the analytical cur=
ves
> > are
> > derived from the propagation characterisics of the even/odd modes and=
tha
> > ts
> > is ok to me. Section 1.4 of your paper speaks of a spice model but it=
is
> > not
> > explained how it is generated. It is also said that the spice simulat=
ions
> >
> > have been compared with those of separate numerical solver but this d=
ata
> > is
> > not shown in the curves.
> >
> > So my question is: what is the meaning of the difference between the
> > analytical and the simulated curves. If the latter are all related to=
the
> >
> > spice model, to appreciate the difference you should explain how
> > it has been generated and correlate the difference with the approxima=
tion
> > s
> > made in this process.
> >
> > Thanks
> > walter steffe
> > ------------------------------------------------------------------
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