Standing Wave Ratio and Frequency Dependence in Transmission Lines

[seang]

If I have a section of transmission line, with a characteristic impedance Z0, how does the standing wave ratio in that section change as a function of the frequency of operation?

Doesn't the stading wave ratio just depend on the characteristic impedance of the line, and the load impedance?

 

[Manchot]

Yes, the VSWR ratio depends only on the magnitude of the reflection coefficient, which is a function of the load impedance and characteristic impedance. However, in general, the load impedance will be a function of frequency, so the VSWR will be as well.

 

[seang]

Finding the Input Impedance at z = 0 (the load) is equal to the load impedance, maybe? If so, don't the tan(Bl) all cancel anyway since l = 0?

 

[Corneo]

Finding the Input Impedance at z = 0 (the load) is equal to the load impedance, maybe? If so, don't the tan(Bl) all cancel anyway since l = 0?

Which would make sense wouldn't it?