Nexxim
Hi all,
I would recommend Nexxim.
It includes a strong harmonic balance solver and a transient solver that is faster than HSPICE and in addition is optimized for S-parameters and W-elements. Both solvers use the same models and netlist (HSPICE compatible) for the simulation.
Nexxim Overview
**broken link removed**
Nexxim Whitepaper (15 pages)
**broken link removed**
For a proper disclosure I work with the Israeli distributor of Ansoft in Israel.
Regards,
Itai