AWR eBooks

RF Electronics Chapter 2: Computer Simulation Page 43 2022, C. J. Kikkert, James Cook University, ISBN 978-0-6486803-9-0. Figure 2.53. Error equations in Output Equations Window of AWR DE project. Similar equations are used for ports 2 and 3 of the networks in figures 2.51 and 2.52. These error equations are used as part of the optimisation process, where the component values of the black box model are optimised to minimise the values of these error equations. Since the impedance measurements only exist at the frequencies shown in table 2.3, the project frequencies must again be set, as described above, to the same values, using the Match_Proj_Freq_to_Datafile_Freq script. That script is accessed from Scripts Simulation menu. This script requires a Touchstone data file containing the relevant frequency values. For the S parameter data, the Touchstone file was part of the project. That is not the case now, so that a simple dummy Touchstone file containing the frequency values must now be produced from the measurements in table 2.3. Import the data from table 2.3 into a spreadsheet program. In many cases, the relevant data already exists in a spreadsheet. Make a new sheet in the spreadsheet program and paste the measurement frequency data into the first column, corresponding to the frequencies at which the equations are to be evaluated. Then add 8 columns containing a zero, to represent the 4 complex S parameter values (one entry for magnitude and one for angle) required by Touchstone files. Create a new Touchstone file in the AWR DE project by right clicking on Data Files and select Touchstone File option. The Touchstone like spreadsheet data is then pasted in that Touchstone data file and the text "#Hz S MA R 50" is added as the first line to produce the Touchstone data file shown in table 2.4. LC Matching Networks Band Pass T A: 0.5701 B: 66.25 Qmin: 3 Rd: 5 Xd: 0.9 Rl: 50 Fm: 150 Lbt: 1.761e-8 Cbt2: 3.722e-11 Cbt1: 4.692e-11 Ld: 9.549e-10 Cbt1M: 1e-12 LbtM: 1e-9 Cbt2M: 1e-12 EP1Z11M = (MeP1Z11M-MoP1Z11M)/(MeP1Z11M+MoP1Z11M) MoP1Z11M = BandpassTModel:|Z(1,1)| MoP1Z11Ph = BandpassTModel:Ang(Z(1,1)) EP1Z11Ph = (MeP1Z11Ph-MoP1Z11Ph) MoP2Z11Ph = BandpassTModel:Ang(Z(2,2)) EP2Z11M = (MeP2Z11M-MoP2Z11M)/(MeP2Z11M+MoP2Z11M) MoP2Z11M = BandpassTModel:|Z(2,2)| EP2Z11Ph = (MeP2Z11Ph-MoP2Z11Ph) MoP12Z11Ph = BandpassTModel:Ang(Z(3,3)) EP12Z11M = (MeP12Z11M-MoP12Z11M)/(MeP12Z11M+MoP12Z11M) MoP12Z11M = BandpassTModel:|Z(3,3)| EP12Z11Ph = (MeP12Z11Ph-MoP12Z11Ph) RF Electronics: Design and Simulation 43 www.cadence.com/go/awr

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