![]() ![]() ![]() ![]() Reflection coefficients can be read directly from the chart as they are unit-less parameters. Once an answer is obtained through the graphical constructions described below, it is straightforward to convert between normalised impedance (or normalised admittance) and the corresponding unnormalized value by multiplying by the characteristic impedance (admittance). The importance of the chart is enhanced by the global information that is possible to obtain simultaneously. Another example is the use of Smith charts in a lot of commercial so ftware about antennas and microwave devices, to display the simulation results. The most commonly used normalization impedance is 50 ohms. network analyzers still have displays that imitate the Smith chart. Normalised scaling allows the Smith chart to be used for problems involving any characteristic or system impedance which is represented by the center point of the chart. These are often known as the Z, Y and YZ Smith charts respectively. Then you add stuff between your source and load and see how that gives you a better looking Smith chart (closer to the center, lack of resonances, etc. Instead of x and y axes, you have circles of constant resistance and arcs of constant reactance. The Smith chart is plotted on the complex reflection coefficient plane in two dimensions and is scaled in normalised impedance (the most common), normalised admittance or both, using different colours to distinguish between them. So yea, the Smith chart can plot the impedance mismatch over frequency.
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