University of Cincinnati-
ECE&CS Department
Microwave Communications
Prepared by: Prof.Altan M. Ferendeci
Matching A Complex Load to 50 W Using a Shunt Stub

The following steps are to be followed:
- Locate the given load (impedance, admittance or reflection coefficient) on the Smith chart.
- Go to admittance chart
- Draw a circle with a radius equal to |GL|(constant reflection coefficent circle).
- Move toward the generator until g=1+jb circle is intersected. This is the length of the transmission line d1.
- Add a parallel susceptance equal to -jb.
- Replace this with an open-circuited or short-circuited transmission line.
- Find the length d2 of the transmission line which will generate -jb.
Note: there are two solutions for this matching problem..
The following step by step procedure will guide you through this matching process.

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Copyright; Altan M. Ferendeci, University of Cincinnati