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What is ViPEC?

ViPEC is a powerful tool for the analysis of high frequency, linear electrical networks. It takes a schematic description of the electrical network and performs a linear analysis in the frequency domain. The output is in the form of port parameters (S, Y or Z) with results presented on a user defined grid, Smithchart or table. It can also be used to compute other characteristics like stability factors and group delay.

ViPEC supports various lumped elements (capacitors, resistors etc.) as well as distributed networks like transmission lines, microstrip and stripline structures. Two port data files are also supported (e.g. the 2-port frequency parameters of various RF transistors as supplied by the manufacturer). The component library is under constant development with new elements added at regular intervals.

Is it free?

ViPEC is now distributed under the GNU General Public License, an open source license. This means that the source code is available to all, and that you are free to make changes as you wish. If you make any changes to the source code that you think might be interesting to other people, please send these updates back to us, so that we can include them in our source as well. ViPEC will be maintained by us, and updates will be released from time to time.

Where do I get it?

ViPEC is now hosted on, and can be downloaded from this site via HTTP or CVS. See the download page for more details.

If you have any comments or suggestion please contact us.



The latest version of ViPEC (version 3.0.3) which includes an easy to use graphical interface is now available for download.

Here are some screenshots.

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