Graphical design for all shunt stubs impedance matching networks

In this paper, we present a graphic design technique, by combining shunt stubs and transmission lines, forming an all-shunt-stub impedance matching network. This design technique relies heavily on Smith chart; the technique uses the intersected points of two admittance circles to reach the matching condition and to determine the susceptance value of each shunt stub. The real part of the input admittance´s value at the right hand side of every shunt stubs is left free to the choice of the designer. The design procedure is explained and an example is described to evaluate this design technique