These plots compare reference impedance renormalization using S11, S21, S12, and S22 (yellow) with using just S11 and S21 (cyan). Shown are results for two different 10.7 MHz Murata ceramic filters renormalized from 50 to 330 ohms. The signal passband is 10.6 to 10.8 MHz. The plots demonstrate that when using a NanoVNA that can measure only S11 and S21, you can benefit by reversing the filter and measuring S22 and S12 as well.
Download the S-parameter plotter with renormalization and Y21 method:
Brian
