W2350EP Datasheet, PDF (8/12 Pages) Keysight Technologies – High Speed Digital Design

Multilayer Model (MLM) Library
This core library lets you model up
to 40 metal layers and 80 coupled
lines. It offers an alternative trade off
in simulation speed versus accuracy
compared with the Momentum
Planar EM simulator. The models
run faster than Momentum, but
Momentum takes post-layout
routing into account. The effects
of impedance, loss, crosstalk, and
delay are modeled with the 2-D
cross-sectional electromagnetic field
solver that underlies this library. Thus
it is particularly suited to pre-layout
channel modeling.
The models include advance
conductor surface roughness
modeling, as well as a frequency-
dependent dielectric loss.
MLM library has advantages over
microstrip and stripline models,
including a greater number of
available coupled-line models, and the
ability to place traces on any specific
layer.
0
-20
-40
-60
0 4 8 12 16 20
Frequency (GHz)
Figure 7. Broadband SPICE model overlays exactly with original S-parameters for a
RambusTM device
Figure 8. Multilayer interconnect models
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