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Problem Regarding Reflector Coefficient

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@YY

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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

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Hi

It is NOT in normalised form.

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

Regards
 

@YY

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

tyassin

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Hi

Yes that is correct
 

Kohi_boy

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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

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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)
 

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