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RF Electronics Chapter 2: Computer Simulation Page 39 2022, C. J. Kikkert, James Cook University, ISBN 978-0-6486803-9-0. Eqn. 2.5 MoS11Re is the real part of S 11 of the Bandpass T model. The format on the right hand side of the = sign is exactly like the format of measurements used in graphs. ES11C is the normalised Error of the S 11 parameters in Complex form. Similar equations are produced for S 21 , S 12 , and S 22 . Since the impedance measurements only exist at the frequencies shown in table 2.2, the project frequencies must be set to the same values, so that the error equations can be evaluated. Section 13: Scripts of the AWRDE users Guide has details on scripts and how to write new ones. Fortunately, the required Match_Proj_Freq_to_Datafile_Freq script is one, which is already included in AWR DE. That script is accessed from Scripts Simulation menu. This script requires a Touchstone data file containing the relevant frequency values. Since that Touchstone file is already included in the project, the project frequencies are then set to the values in table 2.2, so that the optimisation can be done. Figure 2.49. S 11 for Bandpass T model and measurements before optimisation. Figure 2.49 shows S11 from both the model of figure 2.48 and the measurements of table 2.2 as a function of frequency. As expected, our initial values are not correct and there is a significant difference between the guessed and required values. The 3 element values in figure 2.48 and the three Q values are allowed to change under optimisation. The real and imaginary parts of ES11C and the corresponding error equations for S21, S12, and S22 with desired values of zero are set as optimiser goals. ES11C = (MeS11-MoS11)/(MeS11+MoS11) MoS11Re = Bandpass T Model:Re(S(1,1)) MoS11Im = Bandpass T Model:Im(S(1,1)) MeS11Re = Measured_Ckt:Re(S(1,1)) MeS11Im = Measured_Ckt:Im(S(1,1)) MeS11 = Complex(MeS11Re,MeS11Im) MoS11 = Complex(MoS11Re,MoS11Im) RF Electronics: Design and Simulation 39 www.cadence.com/go/awr

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