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m_elneanaei
Egypt
3 Posts |
 Posted - Oct 13 2016 : 05:21:20
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Hello,
I was wondering how to add a dielectric between metal layers in fasthenry.
Thanks
BR,
MF |
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m_elneanaei
Egypt
3 Posts |
Posted - Oct 13 2016 : 05:26:28
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And how to calculate conductance between two metal wires??]
BR,
MF |
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Enrico
545 Posts |
Posted - Oct 13 2016 : 16:20:41
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FastHenry works in the quasistatic approximation. As such, the influence of a dielectric is negligible under this assumption, and therefore not considered. For an exhaustive treatment of the topic, you may refer to M. Kamon, "Fast Parasitic Extraction and Simulation of Three-Dimensional Interconnect via Quasistatic Analysis", PhD thesis at the Massachusetts Institute of Technology, Feb 1998.
About the conductance, FastHenry gives you an impedance matrix; the only conductance it will consider is the mutual resistance, i.e. the change in resistance due to the changes in the effective conductor section because of proximity effect (currents flowing in nearby conductors modifying the current flow in the target conductor). Conductor flowing through a dielectric is not taken into account for the above reason.
There have been recently different projects, possibly using FastHenry and FasterCap / FastCap as internal extractors, to create PEEC models for wide-band simulations, i.e. outside the quasistatic regime, and in some cases including dielectrics, ultimately more or less all based on Ruehli, A. E., and Heeb, H. "Circuit models for three-dimensional geometries including dielectrics", IEEE Trans. on Microwave Theory and Techniques, vol. 40, no.7, July 1992.
You may for instance check V. Shatri, R. Sefab, L. Kurtajc, "MATLAB Partial Element Equivalent Circuit Toolbox for Solving Coupled Electromagnetic-Circuit Problems", International Journal of Current Engineering and Technology, 2013 or P. Jacqmaer, "Hard- and Soft-Switching High-Frequency Power Electronics: Modelling of Parasitics and Electromagnetic Fields", P. Jacqmaer PhD Thesis, University of Leuven, Oct 2015, or R. Torchio, "P.E.E.C. Modelling of Large-Scale Fusion Reactor Magnets", R. Torchio Thesis, Università di Padova, 2016.
Best Regards,
Enrico
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Add dielectric to fasthenry
