I wanted design a double stub tuning. I need to match the source impadence of 25 ohm for max power transfer to the load. All tranmission lines have common characteristic impedence of 50 ohm with exception of the last quarter wave section towards my generator, which has a characteristic impedance of z1=40 ohm. I need to find open-stub lengths I1 and I2. I am trying to solve this with smith chart. who can help me?
