Module 2 : Transmission Lines
Lecture 9  : Graphical Approach for Transmission Analysis
  Transformation from Z to
Let us transform the points from the - plane to - plane.
 
 
Separating real and imaginary parts, we get
 
      --------- (2.5)
      --------- (2.6)
 
Equations (2.5) and (2.6) are the equations of circles. Equation (2.5) represents constant resistance circles and equation (2.6) represent constant reactance circles.