![]() ![]() Mastering the Smith chart is essential to entering the world of RF and microwave circuit design as all practitioners use this as if it is well understood by others. The complex voltage reflection coefficient Γ \Gamma \, is defined as the ratio of the reflected wave to the incident (or forward) wave. The Smith chart is a powerful graphical tool used in the design of microwave circuits. ![]() ) 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. It provides a clever way to visualize complex functions. 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 Smith chart is one of the most useful graphical tools for high frequency circuit applications. For the similar term Volpert graph, see Volpert graph (disambiguation). ![]()
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