Question: designing an inverter transformer for adapting a load ZL = 75ohms to a transmission line of characteristic impedance of 300ohms, and reduced losses, at a frequency of 300MHz.

Answer: length = 0.25m transformer impedance characteristic= 150ohms

Question: Determine the bandwidth of frequencies where the VSWR on the line is less than 1.5.

Answer: I need help. Analytical calculations and then confirm the Smith Chart.


grateful

 

A quarter wave matching transformer matches the source impedance Zs to the load impedance ZL via the line impedance Zo according to the relationship

Zs=(Zo)^2/ZL

If ZL=75Ω and Zs=300Ω then the required Z0=√(Zs*ZL)=√(300*75)=150Ω

 

Do you have access to a Smith Chart simulation program?

 

Do you have access to a Smith Chart simulation program?

No, i don't.