The complex voltage reflection coefficient Γ \Gamma \, is defined as the ratio of the reflected wave to the incident (or forward) wave. Smith chart is composed of impedance (Z) or admittance (Y) circles of constant.
) The blue circle, centered within the impedance Smith chart, is sometimes called an SWR circle (short for constant standing wave ratio). There are two Smith charts Y and Z (admittance and resistance). Points on that circle represent impedance on the line corresponding to distance which is read from the scale wavelengths toward the generator. The Smith chart can be used to simultaneously display multiple parameters including impedances, admittances, reflection coefficients, S n n S_. The Smith Chart To find Z along the line for a particular Z L, find Z L /Z 0 on the chart and draw a circle, centered at 1+j0 through that point. It was independently devised by Tōsaku Mizuhashi ( 水橋東作) in 1937, and by Amiel R. 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. For the similar term Volpert graph, see Volpert graph (disambiguation).
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