Instructions for use
In the red Smith chart, the circle with the horizontal line as the center represents the equal resistance line.
The resistance at any point on the circle is equal, that is, the real parts on the circle are equal;
The red upward or downward arc represents the equal impedance line. The impedance at any point on the circle is equal, that is, the imaginary part on the circle is equal;
The blue circle with the horizontal line as the center represents the isoelectric conductor, and the conductance at any point on the circle is equal;
The blue upward or downward arc represents the equal susceptance line, and the susceptance at any point on the circle is equal;
The horizontal line in the middle of the circle is a pure impedance line. If a point falls on this straight line, it represents pure resistance.
The markings on the line are all resistance values (normalized); the English above
resistance component (r/zo), or conductance component (g/yo)
Resistance (r/zo) or conductance (g/yo)
Above the horizontal line is the inductive reactance line, and below it is the capacitive reactance line; points falling above the line are represented by circuits,
It is a resistor connected in series with an inductor (point b), and the point below the line is a resistor connected in series with a capacitor (point c);
The first big circle in the innermost circle, that is, the place marked with values such as 1.0 and 0.9 in red and blue, represents the value of impedance or admittance. For example, above the horizontal line, the place marked with 0.2 in red means that the impedance is 50*0.2j=10j. The English above
inductive reactance component (+jx/zo), or capacitive susceptance (+jb/yo)
Inductive reactance (+jx/zo) or capacitive susceptance (+jb/yo)
capacitive reactance component (-jx/zo), or inductive susceptance (-jb yo)
Capacitive reactance (+jx/zo) or inductive susceptance (+jb/yo)
The second and third big circles,
angle of transmiss on coefficient in degrees
Transmission coefficient angle
angle of reflection coeffcient in degrees
Reflection coefficient angle
The fourth and fifth great circles are used for transmission line calculations,
wavelengths toward generator
Wavelength towards the signal source
wavelengths toward load
Wavelength towards the load
For the convenience of calculation, the impedance is generally normalized to 50 ohms.
For example, a 100-ohm resistor displays the point 2 (100/50) on the diagram;
it works
it works
it works