[SI-LIST] Re: HFSS vs. CST
- From: dgun@xxxxxxxxxx
- To: si-list@xxxxxxxxxxxxx
- Date: Wed, 12 May 2004 12:45:06 -0800
From: "Moeller, Merrick" <mmoeller@xxxxxxxxxxxxxxx>
> Experts,
> Are there any benchmarks that compare the performance between
> HFSS and CST available?
> In going from a frequency domain solver to a time domain solver
> and vise versa what are the trade offs?
> Is accuracy of the HFSS and CST at the same level?
> Is there any type of problem that will not be accurate with one
> or the other?
> Regards,
> Merrick
My benchmarks show that they are comparable. Both have advantages and both
have problems. Rembember that both HFSS v9 and CST v5 are significant changes
from previous versions, and still have many bugs and lack of functionality to
be worked out. My input is that I would really like to see a program that
integrates features of both HFSS and CST. CST seems to be headed that
direction.
As for the comparison between HFSS frequency-domain and CST time-domain solver,
I would make these recommendations:
* Use HFSS for high-Q and/or narrow-band simulations
* Use CST for broadband simulations where you don't need to see high-Q
resonances
* Use HFSS for high dynamic range (to get out-of-band filter performance, for
example)
* Use HFSS for dispersive simulations
In both tools, the mesh is the key.
(A side note: These are generalizations. For example, because of the way
meshing works, I had better success simulating a bandpass CPW filter in CST
than I did in HFSS, despite the above recommendations.)
--
Daniel
--
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