![]() ![]() These steps can be implemented as modules written in Matlab scripts. The paper restates the solving techniques of a two-stub Smith chart problem in terms of a process consisting of steps. Matlab provides a powerful computation and display platform by means of which fundamental and advanced concepts relating to transmission lines can be understood and implemented. This paper specifically presents a Matlab-based teaching approach to the two-stub Smith chart problem that is typically covered in an undergraduate course on electromagnetic fields. The Smith chart illustrated in figure 4 has also other auxiliary scales useful for the determination of some parameters like for example, the VSWR, the amplitudes of the reflection and transmission coefficients, the return loss in dB etc. It can also be used to determine distances, toward the load or toward the generator, expressed in degrees bearing in mind that a distance of /2 corresponds to 360°. The innermost scale is a protractor (in degrees) and is primarily used to determine the phase of the reflection coefficient and the phase of the transmission coefficient. The outermost scale is used to determine distances in wavelengths toward the generator and the next scale is used to determine distances in wavelengths toward the load. The main difference between this chart and the basic Smith chart shown in figure 2 is the existence of three scales around the periphery. Nowadays, the Smith chart appears in several different types. Some important features of a Smith chart. ![]()
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