However, the Smith chart needs to be modified for nonreciprocal. If we are dealing only with impedances with non-negative resistive components, our interest is focused on the area inside the circle. Smith (19051987) and independently by Mizuhashi Tosaku, 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. Those with negative real parts map outside the circle. Complex numbers with positive real parts map inside the circle. Mizuhashi, 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 has shown to be a very useful graphical tool when solving reciprocal uniform transmission-line problems. The Smith chart is a mathematical transformation of the two-dimensional Cartesian complex plane.
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