[SI-LIST] Field Solver Questions

[Geoff Stokes <gstokes@xxxxxxxxx>]

Hello Sainath

For Signal Integrity customers, maybe the issue about which fields are
calculated depends on the desire for a full-wave solution: the answers
required are the amplitudes and phases of voltages and currents at the ports
(so far we have to be content with s-parameters and then find a way into the
lumped element simulator).  The fields are not usually of direct interest
unless you're looking at antennas or absorption.

Also the speed in use also includes the time it takes to set up the physical
models.  That can be much longer than the wave calculations!  So I would
look for a product which is easy to use with good interfacing to other
engineering software, as well as providing efficient calculation.

I have an observation on the choice of calculation method.  SI is
essentially a broadband problem, so there is no need to explore resonances
with great accuracy, only to identify and address them.  I think for this
reason, a time domain method works well (maybe FDTD etc).

Best wishes
Geoff

> 
> Field solver experts:
> 
> I have some generic questions. Consider the well-known finite element 
> method(FEM) solver and assume full-wave solution and almost perfect 
> boundary, unless mentioned otherwise.
> 
> 1) Are there any benchmarks on the speed of these solvers compared to 
> other kinds of solvers in time-domain or frequency-domain?
> 
> 2) If a raw, non-optimized solver does it in T time, what is 
> the likely 
> max. speed improvement using conceptual or computational 
> optimization? 
> An educated guess will help for a start.
> 
> 3) Suppose a solver is designed to solve for only three E(or 
> H)components, instead of all six field components. What is the likely 
> max. speed improvement? Again, an educated guess will help 
> for a start.
> 
> 4) Would you consider the solver in 3) a full-wave solver? If 
> yes, under 
> what conditions? If no, please give reasons.
> 
> 5) If you were to design the solver in 3), what kind of conceptual 
> pitfalls, if any, would you look for and try to avoid?
> 
> Thanks in advance,
> Sainath
> 


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[SI-LIST] Field Solver Questions

[SI-LIST] Field Solver Questions