The complex voltage reflection coefficient Γ \Gamma \, is defined as the ratio of the reflected wave to the incident (or forward) wave. ) The blue circle, centered within the impedance Smith chart, is sometimes called an SWR circle (short for constant standing wave ratio). The Smith chart can be used to simultaneously display multiple parameters including impedances, admittances, reflection coefficients, S n n S_. It was independently devised by Tōsaku Mizuhashi ( 水橋東作) in 1937, and by Amiel R. We move along the constant conductance circle by 0. The Smith chart (sometimes also called Smith diagram, Mizuhashi chart ( 水橋チャート), Mizuhashi–Smith chart ( 水橋スミスチャート), Volpert–Smith chart ( Диаграмма Вольперта-Смита) or Mizuhashi–Volpert–Smith chart), is a graphical calculator or nomogram designed for electrical and electronics engineers specializing in radio frequency (RF) engineering to assist in solving problems with transmission lines and matching circuits. The normalized load admittance is shown on the Smith chart by a yellow dot. For the similar term Volpert graph, see Volpert graph (disambiguation). The chart plots normalized resistance and reactance in the reflection coefficient plane, using a standard LabWindows/CVI graph control.
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