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Measurement of S-Parameters
- Thread starter Electro11
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The above answer was not correct, This would represent the "power". The formal definition for S21 is b2/a1 when a2=0 (ie. the output port is connected to the reference impedance). Therefore, If the device is matched at input and output, VG1=a1, and V2=b2, so S21=V2/VG1.
My point is that this is because of normalization of amplitude. From book:
Reinhold ludwig & Pavel Bretchko
"RF Circuit Design Theory and Applications"
Page 171-172
You can find solution there.
By the way, I have a question here,too. Does somebody know why we should normalize here? I feel confuing for the normalization factor in those formulas.
Reinhold ludwig & Pavel Bretchko
"RF Circuit Design Theory and Applications"
Page 171-172
You can find solution there.
By the way, I have a question here,too. Does somebody know why we should normalize here? I feel confuing for the normalization factor in those formulas.
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