W2350EP Datasheet, PDF (11/12 Pages) Keysight Technologies – High Speed Digital Design

Electromagnetic (EM) Simulators
Keysight EEsof EDA offers two EM
simulators in ADS. These tools
employ the method of moments
and finite element method (FEM)
methods.
Contact your Keysight EEsof EDA
ield sales engineer for more infor-
mation or for a free evaluation.
For general information about
Keysight EEsof EDA, visit:
www.keysight.com/find/eesof
For more information about applying
Keysight’s Advanced Design System
to signal integrity challenges, visit:
www.keysight.com/find/signal-integrity
For information about Keysight’s ADS
Signal Integrity bundles, visit:
www.keysight.com/find/eesof-si-products
To request an evaluation of Keysight’s
Signal Integrity solutions, visit:
www.keysight.com/find/eesof-si-demo-
software-request
Figure 13. Trace and via modeling in
ADS Momentum
Momentum Element: The leading 3D-planar EM simulator
Momentum is a 3-D full-wave-
electromagnetic (EM) simulator used
for accurate interconnect analysis.
It accepts arbitrary laminar design
geometries such as PCBs and pack-
ages that consist of multi-layer traces
and vias. Accurate EM simulation
enables signal integrity designers to
improve interconnect performance
and increases conidence that the
product will function as simulated after
fabrication.
Momentum RF is a the quasi-static
mode of the Momentum that reduces
simulation time, compared with the
regular microwave mode without
sacriicing accuracy. Quasi-static
mode is particularly applicable to the
case where the wave propagation
across the structure is practically
instantaneous. In contrast, microwave
mode takes the inite wave propaga-
tion speed into account and should
be used when the wavelength of the
highest frequency under consideration
is smaller than the largest dimension
of the structure.
Electromagnetic/circuit co-simulation
with layout components breaks down
the barriers between electrical and
physical analysis domains. “Look
alike” layout components allow you
to create custom symbols that can
be used in the schematic design
view. Once artwork and ports are
deined, the user can generate a layout
component with the click of a button.
Because Momentum is integrated
into the ADS design low, simulation
setup times are reduced, and design
productivity is increased. ADS integra-
tion eliminates the error-prone method
of ile transfer between disparate point
tools.
Although Momentum is principally
used for multilayer geometries it does
also have a bond wire and via models
that adds only one unknown per bond
wire or via. Momentum also has the
same frequency-dependent dielectric
and conductor surface roughness ca-
pability as the MLM library mentioned
above. Unlike previous generations
of power integrity tools, Momentum
make no assumption of solid power/
ground planes can analyze PDNs with
heavily perforated planes. The SI/
PI Analyzer wizard lets you set up
simulation in a snap using a net-based
connection-oriented approach which
is more eficient than the traditional
polygon-by-polygon method. Our PI
worklow lets you combine an EM-
based PDN model with lumped ele-
ment models for the voltage regulation
module (VRM), the chip power model
(CPM), and de-coupling capacitors
(decaps). You can perform continuous
optimization using ideal capacitors or
discrete optimization over a given EIA
footprint in a vendor-speciic capacitor
library such as the one downloadable
from Murata.
FEM Element: An integrated, full 3D EM simulator
There are many types of components or FEM Element (based on the inite
such as bondwire arcs and dielectric
element method).
bricks that require 3-D electromagnetic
analysis on non-multilayer geometries. In addition to the ADS platform, our
FEM Element is ideal for this task.
EMPro platform offers a full 3D CAD
Designers can use ADS layout tools
user interface that can export param-
or import a layout from a third-party
eterized components to ADS. You can
enterprise board tool such as Cadence switch your FEM Element license back
Allegro or Mentor Expedition and
and forth between the ADS and EMPro
simulate it using either Momentum
user interfaces. We also offer a FDTD
(based on the method of moments)
Element under the EMPro platform.
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