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Smith chart is a data visualization control for high frequency circuit applications to visualize the complex functions. It has two sets of circles to plot the parameters of transmission lines.

Windows Forms smith chart control

Rendering mode

Both the impendence and admittance of transmission lines can be visualized with Smith chart.


Smith chart has horizontal and radial axes where the horizontal axis is used for plotting resistance values of transmission lines and the radial axis is used for plotting reactance values of transmission lines. The appearance of both axes can be customized, such as their labels, major and minor grid lines, etc.


Any number of line series can be plotted for representing data. Also, it provides different color models and customizable options.

Data labels

Data points can be easily annotated with labels to help improve the readability of data. The data labels are smartly arranged to avoid intersection when there are large amounts of data.


Legends provide additional information that is helpful in identifying individual series in a Smith chart. They can be docked to the left, right, top, or bottom positions around the plot area. By clicking a legend item, we can toggle series visibly.

Windows Forms Smith chart with legend support


Tooltip displays a pop-up with additional information when the mouse is hovered over a data point.

Windows Forms Smith chart with tooltip support


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