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Smith chart

Graphical calculator used in electrical engineering(a) Sample Smith chart showing circles of constant Re⁡(z){\displaystyle \operatorname {Re} (z)} in red and arcs of constant Im⁡(z){\displaystyle \operatorname {Im} (z)} in blue.(b) Animation illustrating the conformal mapping from the z{\displaystyle z}-space, where constant-resistance and constant-reactance lines are straight, to the Γ{\displaystyle \Gamma }-space, where they become circles and arcs.

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