You now know the S11, VSWR, Impedance, and frequency values at that cursor. First, find the admittance of this impedance using your calculator. With a Smith chart, you can plot impedance values using the red and green circles and circle segments and then read reflection-coefficient values from the gray. Use the data cursor icon in the toolbar to insert a cursor on your smith plot chart. Instead of considering its impedance directly, you express its reflection. relate reflection coefficients to complex source, line, and load impedances. Because the formula for impedance is a bit cumbersome and not intuitive, design calculations and measurements are often made graphically using a Smith Chart. A Smith chart is developed by examining the load where the impedance must be matched. With any one of these 3 parameters given, you can read the other 2 in the chart simultaneously with a very reasonable accuracy. Some measuring instruments such as network analyzers actually use a Smith chart to display conditions on lines and networks. The Smith chart resides in the complex plane coefficients, but such plots aren’t particularly of reflection coefficient G G + G G ej G /u.

The Smith chart can be used to simultaneously display multiple parameters including impedances, admittances, reflection coefficients, S n n is defined as the ratio of the reflected wave to the incident (or forward) wave. The normalized impedance of the load is given. Now, you have learned all basics of Smith chart and you know the chart is consisted of 3 very basic parameters,, and they can be converted among each other based on a few sophisticated equations. Smith (1905–1987) and independently by Mizuhashi Tosaku, is a graphical calculator 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. The Smith chart is a graphical tool for determination of the reflection coefficient and impedance along a transmission line. Electrical engineers graphical calculator

Using a smith chart