ANSYS SIwave
ANSYS SIwave is a specialized design platform for power and signal integrity analysis of electronic packages and PCBs. SIwave includes a hybrid, full-wave finite element solver engine to perform DC (static), AC (frequency domain) and EMI (dynamic) simulations.
The SIwave platform enables engineers to create customized SI, PI and EMI design flows. The SIwave platform provides the gateway between popular EDA layout tools, such as Altium, Cadence, Mentor, Zuken, and can drive a host of optional solvers.
ANSYS SIwave solves complete package and PCB simulations and is the platform for advanced signal integrity, power integrity and EMI analysis.
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Electromagnetic Field Solvers 
ANSYS HFSS – industry standard, full-wave EM simulation for critical nets
Sentinel-PSI – fast FEM solver for power integrity analysis of packages
ANSYS Q3D Extractor – parasitic extraction of packages and boards from MCAD geometry
PI Advisor – optimization of decoupling capacitors
ANSYS TPA – parasitic extraction of packages and board from ECAD geometry
Circuit Simulators
ANSYS DesignerSI – high-capacity, transient circuit simulation
Synopsys HSPICE – transient circuit simulation
Multiphysics Solvers
ANSYS Icepak – electronics thermal management
ANSYS Mechanical – stress