The Smith Chart can be used to represent many parameters including impedances, admittances, reflection coefficients, S_. 14.6.6a, the load admittance Y L is to be matched to a transmission line having characteristic admittance Y o by means of a 'stub' consisting of a shorted section of line having the same characteristic admittance Y o. Manual Data Entry - The complex impedance (specified as an impedance, admittance, or reflection coefficient) can be entered as a function of frequency manually. Use of the Smith Chart utility has grown steadily over the years and it is still widely used today, not only as a problem solving aid, but as a graphical demonstrator of how many RF parameters behave at one or more frequencies, an alternative to using tabular information. The admittance form of the Smith chart is used in the following example. Smith (1905-1987), is a graphical aid 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.
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