ONE PORT RETURN LOSS MEASUREMENTS (S11) AND TWO PORT TRANSFER FUNCTION (S21) MEASUREMENTS SETUP

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Here I would simply clarify the difference of setup we talked about between this two measurements with the following two drawings .

The two 10 dB attenuator are used to guarantee a perfect matching in the section after the cables .

Of course they limit the dynamic range of the measurements . For this reasons they are not always used or used with lower values .





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