[SI-LIST] ADS Momentum simulation of a differential transmission line
- From: Chen Jikai <yfgchen@xxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Tue, 28 Jul 2009 02:43:58 +0800 (CST)
Hi all,
We have been simulating a differential microstrip using ADS Momentum. One weird
thing we observed is that the loss is not monotonic. S21 rolls off as expected
from DC to around 30G. However, from 30G, it increases until about 60G. Since
it's just a simple transmission line, involving no discontinuities, shouldn't
S21 be monotonic? Does anyone know what could be causing this problem?
Thanks a million in advance.
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