Problem Regarding Reflector Coefficient

[@YY]

Since the reflector coefficient, Γ which shown in the VNA was in dB form. If I wanna look for the Zin by using the smith chart, I wonder is the Γ value is in normalize form or not. Can we directly apply the Γ in the smith chart to find the Zin?

 

[tyassin]

Hi

It is NOT in normalised form.

Yes you can find the input impedance for small-signal.

Regards

 

[@YY]

if it's not in normalize form, then should we convert it into normalize form before we apply into the smith chart?

 

[tyassin]

Hi

Yes that is correct

 

[Kohi_boy]

Reflector coefficient in dB. Are you referring to S11 ?
If so, you can change S11 to r (in Mag and Phase).

Given Mag and Phase of r, you should be able to plot in the smith chart and obtain the normalise Zin from the chart.

 

[Chinaski]

Push the FORMAT button on your VNA front panel and change to Smith Chart. It's the easy way. Nevertheless, try to study harder before using a VNA (it's a very expensive toy to play with)