AD8362 S-Parameters

Document created by analog-archivist Employee on Feb 23, 2016
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I am using the spreadsheet of S-Parameters provided for the AD8362. I don’t
understand how to do a relevant simulation of the global circuit and what I
sould get on port-1 and port-2.

 

 

We do not publish s-parameters for rf detectors. It is not really meaningful to
talk about an RF detector having a full set of s-parameters. While you could
measure the input return loss (S11) of the RF input of an  rf detector, you
can't really talk about the the S21 since the output is not linearly related to
the input. Also since the rf detector output looks like dc if the instantaneous
input power to the detector is constant, you cannot talk about there being a
phase relationship between the input and the output.


If you are trying to model the behavior of an rf detector with a linear-in-dB
transfer function, the following equation may be helpful.


Vout = Slope x (Pin - Intercept)


where


Vout is the predicted output voltage of the rf detector


Pin is the input signal to the rf detector expressed in dBm


Slope is the incremental relationship between input power and otuput voltaqge
(i.e. deltaVout/deltaPin), expressed in mV/dB or V/dB


Intercept is an extrapolation of the rf detector's transfer function. The
Intercept is the extrapolated input power level that would result in a detector
output voltage of 0 V.

You can find more here: http://ez.analog.com/docs/DOC-2577

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