The Smith chart, invented by Phillip H. 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. 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 Smith chart can be used to simultaneously display multiple parameters including impedances, admittances, reflection coefficients, scattering parameters, noise figure circles, constant gain contours and regions for unconditional stability, including mechanical vibrations analysis. The Smith chart is most frequently used at or within the unity radius region. However, the remainder is still mathematically relevant, being used, for example, in oscillator design and stability analysis.
Other articles related to "smith chart, chart, smith":
... A generalized 3D Smith chart based on the extended complex plane (Riemann sphere) and inversive geometry was recently proposed ... The chart unifies the passive and active circuit design on little and big circles on the surface of a unit sphere using the stereographic conformal mapping of the reflection coefficient's generalized plane ... Considering the point at infinity, the space of the new chart includes all possible loads ...
... Any 2-port S-parameter may be displayed on a Smith chart using polar co-ordinates, but the most meaningful would be and since either of these may be ...
... Phillip Smith invented the Smith Chart in 1939 while he was working for The Bell Telephone Laboratories ... When asked why he invented this chart, Smith explained - "From the time I could operate a slide rule, I've been interested in graphical representations of mathematical relationships." In 1969 he ...
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