[SI-LIST] Re: [suspected spam] PCB parastic extraction
- From: steve weir <weirsi@xxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 05 Nov 2011 04:16:59 -0700
G represents real loss through the dielectric. In order to be causal, G
must be frequency dependent.
Any of the higher end tools extract RLGC versus frequency. Most if not
all the higher end tools directly extract from Cadence or Mentor format
PCB files. I do not know of any tools that extract from Gerbers.
Gerber format does not natively include any net list information.
Steve.
On 11/5/2011 4:00 AM, sunil bharadwaz wrote:
> Hi All ,
> I'am trying to extract the PCB parasitics for RF Layout in the process of
> doing impedance matching for a critical circuitry.Freq :: 2- 6 Ghz.
>
> I have few queries as listed below in this regards ..
>
> For a loss'y transmission line the representation should be as RLGC.
> However , most of these extraction tools seem to be extracting
> merely L , C ( independent of frequency )& R as frequency dependent
> skin effect.Should the di-electric related losses be considered as
> "G " ?
>
> Are there tools which extract the PCB parasitics directly in terms of RLGC ?
>
> I believe most of the PCB extraction tools are based on 2D field simulators.
> Hence , the extraction does not make sense when there is a split plane .
> Is the only option is to go for 3D EM simulators ?
>
> If we go for 3D EM simulators , will they be able to extract from the PCB
> gerbers directly ?
>
> Can you pls throw some light on the above issues including the relevant tools
> ?
>
> Thanks in Advance !!
>
> Regards
> Sunil
>
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