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.
pie chart
It can also be called a circular graph
Data collection
Phillip Smith has written: 'Electronic applications of the Smith Chart'
A circular pie chart is a type of graph that does not have an x and y axis.
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.
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.
Phillip Hagar Smith has written: 'Electronic applications of the Smith chart' -- subject(s): Smith charts
to calculate impedence of power supply
A circular chart tape recorder is a device used to record and visualize data over time, typically in scientific or industrial applications. It combines a circular chart, which provides a continuous graphical representation of data, with a tape recording mechanism that captures audio or other signals. As the tape moves, a pen or marker traces the data onto the chart, allowing users to analyze trends and patterns in the recorded information. This type of recorder is often used for monitoring processes, such as temperature or pressure, in real-time.