TQL9092_S parameter file_S11, S22

RF Solutions RF Low Noise Amplifiers
1

Hi,

  1. The S parameter files given for TQL9092 isn’t depicting the values of S11 and S22 as given in the data sheet. The S parameter file column 2 and 8 have values for S11magnitude and S22magnitude close to 0 but not negative as in the datasheet.

Could you please check the S parameter files uploaded and provide the correct files?

  1. What is the difference between the 2 S parameter files provided - TQL9092_deembedded_Sparam_with_NoiseParam.s2p and TQL9092_de-embedded_sparameters_3p3Vdd.s2p ?
2
  1. The s-parameters are actually the same, but expressed in different units: the datasheet uses dB whereas the s2p file uses MA. If you import the s2p file into a tool such as MatchCalc and export in dB format, you will see the same values as in the datasheet.
  2. Different bias points. The first file is for Vdd = 5V, Idd = 65mA, the second file is for Vdd = 3.3V, Idd = 70mA
3

  1. The discrepancy is because the s-pars are in different formats. The s2p files on the web are format M indicating magnitude/angle, and the s-pars listed in the datasheet are decibel/angle. When I plot the s-par file in ADS it matches the values in the datasheet. I also did a conversion from ADS and exported into dB format, see attached. This aligns with the datasheet.
    TQL9092_dB.s2p (11.7 KB)

  2. The file with noise parameters embedded is at 5V bias, the other is at 3V3.

4

Qorvo Qspice is capable of opening .s2p files and plotting their results with different axis settings (polar in dB, non-dB, Cartesian R+jX, or Smith chart for S11/S22).

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Workflow demonstration in a gif image
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