The load admittance of the short-circuited stub is infinite. That is plotted on the Smith chart as point B. From point B, move toward the generator until the stub admittance is − j 1.75. That...

The load admittance of the short-circuited stub is infinite. That is plotted on the Smith chart as point B. From point B, move toward the generator until the stub admittance is − j 1.75. That corresponds to a distance of 0.083λ and is the required length for the short-circuited stub.