SmithCharts

SmithCharts refers to resources and software related to Smith charts, a graphical tool used in RF engineering to visualize complex impedance and reflection coefficients. These resources can include interactive charts, libraries, tutorials, and documentation.

The Smith chart was introduced by Phillip H. Smith in 1939 to simplify the design of matching networks and analysis of transmission lines. It maps complex impedance or admittance onto a two-dimensional plane with circles and arcs, enabling rapid impedance transformation via transmission line sections.

A SmithCharts collection typically provides normalized impedance plots, constant-resistance and constant-conductance circles, and capability to compute and display SWR, reflection coefficient, and impedance transformations. It may include cross-platform libraries for Python, MATLAB, JavaScript, or standalone apps, plus tutorials and examples.

As a term, SmithCharts may refer to a community-maintained set of resources rather than a single official product. Users leverage these tools for RF/microwave design, antenna matching, impedance measurement, and teaching. See also Smith chart, impedance matching, and reflection coefficient.