FreeLists / si-list / [SI-LIST] Re: Modeling Cable

["Ray Anderson" <ray.anderson@xxxxxxxxxx>]

Srivats-

Using the physical characteristics on the RG400U data sheet:

http://www.repic.co.jp/contents/products/huber/seihin/rf/pdf/rg400u.pdf


and the procedure describe in the following paper by Richard Wheeler:

http://www.wheeler.com/technology/technicalpaper2/technicalpaper2.pdf


you should be able to synthesize a spice (or other simulator) compatible
model that accounts for loss as well as impedance. With a little thought
you could probable back the RLGC parameters out of the data as well.

If you have access to Agilent LineCalc or the field solver in Hspice (or
other similar field solver) you can create a model from the physical
dimensions and material properties.


Or you could measure the cable with either a VNA or a TDR and synthesize
a model from the measured data (or use the s-parameters directly).

Lots of possibilities, the details are left to the interested
student.....

-Ray

Xilinx Inc.




-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]
On Behalf Of Srivats Partha
Sent: Monday, July 09, 2007 2:35 PM
To: si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Modeling Cable

Hello Gurus
I have a pasternac RG 400/U cable. We are using  this to hook a 3 ghz
scope to a CDM  ESD tester. I want to model this cable in Cadence
environment . I have used the LMG tool in cadence previously , it does
not seem to have a option to model co axial cable, the tool has options
to model only a strip line, micro stripline , CPW and a sub loss  line.
Under what category should I put this RG 400/U cable , Is it a coaxial
cable? If so any hints on generating a RLCG matrix for this cable so
that I could plug into the MTLINE model in spectre environment and use
it for simulations? else any suggestions on how I should go about
modeling this structure?
Regards
Srivats
=20
--
I have no special talents. I am only passionately curious. AE





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