Series resistor sets impedance?

[D.A.(Tony)Stewart]

It gets most "complex" when the cable length is 1/4 wavelength and is mismatched at both ends significantly.


@neazoi needs to make some comments. ... and specify load impedance or s11 if known.

 

[volker@muehlhaus]

The problem is the transmission line between 10k and load.

I agree that it's better to place the 10kOhm resistor at the cable output = filter input.

 

[FvM]

@neazoi never mentioned a cable between 10k resistor and load (filter). Even if it's rather short (length << lambda/4), it involves a parallel capacitance for a load with ZL > Z0 and dwarts the idea of driving the load with high impedance. Problem is that some participants assumed a cable in this place and others (like me) expected it on the generator side. So we where partly talking on cross purposes.

It's well substantiated to ask for a sketch or photo before starting to argue.

 

[KlausST]

Hi,

I did not expect it ... but I did not exclude it either.

It may be it may be not...

Klaus