FreeLists / si-list / [SI-LIST] Re: About W-element formats

["Tetsuhisa Mido" <Tetsuhisa.Mido@xxxxxxxxxxxx>]

Dear Terence,

Just a minor correction and a few comments.

The w-element now supports 5 types of input. In addition
to conventional 4 types, HSPICE w-element now accepts
transmission line based s-parameters as input.

Yes, both the u-model and field solver model accept cross=20
sectional geometry. The u-model uses relatively simple formulations
to estimate the transmission line parameters. The Field solver model
discretises given structure and solve the EM field. Field solver model
allows you to specify higher level of complexity. And generally,
field solver model gives you higher accuracy.
 =20
Once the field solver model extracts RLGC parameters,=20
the rest of the simulation process is exactly the same as=20
the RLGC model. Therefore, there should be no difference=20
between field solver model and reused RLGC model results.

regards,

        ted mido

> -----Original Message-----
> From: si-list-bounce@xxxxxxxxxxxxx=20
> [mailto:si-list-bounce@xxxxxxxxxxxxx] On Behalf Of=20
> TerenceHsieh@xxxxxxxxxxxx
> Sent: Tuesday, September 13, 2005 1:49 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] About W-element formats
>=20
> Dear all
>           I have some confuse about w-element. The w-element support=20
>=20
> 4 different formats to specify the transmission line properties.=20
>=20
> RLGC model, U-Model, Field solver model and tabular model.=20
>=20
> 1.      Both u-model and field solver model need to describe geography
> of the stack-up.=20
>=20
> What's the difference of these two models? Application and accuracy.=20
>=20
> 2.      When we using field solver calculation, it could output a RLGC
> matrix. If we using the=20
>=20
> RLGC model as the w-element input format, how is the discrepancy=20
>=20
> between the field solver model and RLGC model?
>=20
> 3.      Base on some documents, tabular model is suggested to=20
> be used in
> high frequency=20
>=20
> simulation. What's the common method to get the tabular table
> information.=20
>=20
> =20
>=20
> Thanks.=20
>=20
> =20
>=20
> Terence
>=20
>=20
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