It is because it represents 180 degrees of a wavelength. every 180 degrees the impedance on a transmission line repeats itself
i looks circular like
It is a circular chart which is divided into at least two parts.
Phillip Smith has written: 'Electronic applications of the Smith Chart'
pie chart
It can also be called a circular graph
Data collection
An analog circular chart recorder is a device used to continuously record data over time on a rotating circular chart. It typically employs a pen that moves in response to changes in the measured variable, such as temperature, pressure, or humidity, creating a graphical representation of the data. The circular chart enables the visualization of trends and patterns, making it useful in various applications, including industrial monitoring and laboratory experiments. Unlike digital recorders, analog chart recorders provide a tangible, physical record of data that can be easily interpreted.
The Smith Chart is a graphical tool used in electrical engineering to analyze complex impedance and reflection coefficients in transmission lines. The circular arcs on the Smith Chart represent constant reactance or resistance, with the 0.5 wavelength reference point indicating a specific phase shift. At this point, the impedance transformation along a transmission line results in a significant change in the reflection coefficient, allowing engineers to easily visualize and design matching networks for RF applications. The 0.5 wavelength corresponds to a half-cycle of a wave, where the impedance seen at one end of the line is transformed to a different impedance at the other end, providing a comprehensive view of the circuit behavior.
If you look at the reflection coefficient curve as a function of frequency, it follows a counter-clockwise direction about the Smith chart. You should see a loop, and at the "top" of the loop, that is the oscillation frequency.They both have in common an open-loop gain greater than one, however. So the curve will be outside the Smith chart.
A circular pie chart is a type of graph that does not have an x and y axis.
Phillip Hagar Smith has written: 'Electronic applications of the Smith chart' -- subject(s): Smith charts
Yes, a chart that represents data in a circular form is called a pie chart. It displays the proportions of different categories as slices of a circle, with each slice representing a percentage of the whole. Pie charts are useful for visualizing relative sizes and comparing parts to a whole at a glance.