ads momentum mim capacitor simulation
Mdanaie's "bomb" statement is beautiful, nice one! I agree.
In this case, Wizardz, I think you should consider using a combination of tools. Momentum should be OK for the MIM cap. Sonnet will do it better (I do work for Sonnet, but I am confident that my statement is true), but either tool should be up to the task.
You could use HFSS for the arbitrary 3-D part, but the problem there is that there is no supported design flow between Ansoft HFSS and either Momentum or Sonnet. If you start doing this on a regular basis, and a file format changes somewhere (some one added a semi-colon in some file format, for example), your entire design flow comes crashing down until you figure out what happened.
If that might be a factor, you could consider Agilent HFSS. I have not seen any comments about Agilent HFSS, so I do not know how it compares technically with Ansoft HFSS. However, I am sure the design flow to ADS will be supported, and then there is a well established and supported bi-directional design flow between ADS and Momentum and Sonnet. In fact, we often recommend designers double check results by analyzing in two simulators. It is unlikely that two simulators (in this case Momentum and Sonnet) will give the same error.
Another possibility is to simulate the 3-D portion in CST Microwave Studio (my company represents CST in North America). Supported design flow exists between CST, ADS, and Sonnet.
You can also try posting your problem on the Sonnet forum (
www.sonnetsoftware.com) and see what people say. There are some world class experts that keep a close watch there, and the forum has become quite popular for that reason. Good luck!