CSmith - The Smith Chart Pogramm

Screen shot of CSmith

Update : Download CSmith V. 3.1 (3MB)

CSMITH - "An RF designer's Dream!" CSmith is a Smith chart program with many high-level features and some enhancements compared to previous versions (Look at the help file for details on the extensions). It can also be integrated into the complete information based system for electrical engineering, ELEKTA (note: the tools included in Elekta are more basic). With CSmith, you can design matching networks in a similar way to the conventional Smith diagram, but there are a number of far more powerful new features : (see pdf)

element parasitics included

S-parameter blocks and transistors available

easy modifying, rearranging, loading and saving of circuits

export of S-parameters and the complete circuit

performing frequency sweeps and Monte-Carlo analysis

displaying power gain or return loss vs. frequency

stability factor, MAG, available gain, VSWR, etc.

transforming mixed parallel and series RLC combinations

Do you simulate using APLAC or SPICE (PSpice, HSpice, etc.)?

Then you can use CSmith (or AdLab) very effective! Design your circuit with CSmith and export it. The remaining work can be done in your simulator: Add blocks, perform optimizations, etc. Using the export functions this works very comfortable, e.g. for amplilifers, matching networks or filters.

Compare CSmith to your Smith Diagram! Feedback is encouraged. Look at the help file / pdf for new features.

CSmith runs on Windows 95/98/ME/NT4.0/2000/XP/Vista and higher. It is distributed as shareware for $35 (see ORDER.TXT).

Note : CSmith is part of AdLab!

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