[SI-LIST] Skin effect in ADS
- From: Matthew Herndon <mherndon@xxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 11 Jun 2004 10:53:30 -0700
Hi -
I am a relatively new user of ADS (most of my background is with
various flavors of SPICE). I really like the ADS; however, I've run
into a limitation that, if I understand things correctly, would
severely limit its usefulness to me: apparently, none of the
transmission line models in ADS model skin effect.
I discussed the situation with ADS support; they confirmed that skin
effect is not modeled in the transmission lines in their "Distributed
Components" library (the one we looked at in detail was the MACLIN
model of asymmetric coupled microstrip lines). The only workarounds
they suggested involved using the "multilayer library" or using
momentum, both of which are field-solver based (therefore I would
expect them to be very slow, a major drawback). They both also require
an additional license (a minor drawback).
Has anyone else run into this problem? Is it as serious a limitation as
it appears to me?
Along with the fact that a number of other simulators now support
time-domain simulation of s-parameter blocks, I now feel quite a lot
less incentive to use ADS. Or am I overlooking something?
-matt
Matt Herndon, PhD.
Signal Integrity Group
Apple Computer
Cupertino, CA
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