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Analyze Circuits

After you add your circuits, you can analyze them using the app:

  1. Select the component or network you want to analyze in the RF Component List pane of the RF Design and Analysis app. For example, select the LC Bandpass Pi component, as shown in the following figure.

  2. In the Analysis pane:

    • Enter [1e8:5e6:2e9], the analysis frequency range and step size in hertz, in the Frequency field.

      This value specifies an analysis from 0.1 GHz to 2 GHz in 5 MHz steps.

    • Enter 50, the reference impedance in ohms, in the Reference impedance field.


    Alternately, you can specify the Frequency and Reference impedance values as MATLAB® workspace variables or as valid MATLAB expressions.

  3. Click Analyze.

    The Analysis pane displays a Smith® Chart, an XY plot, and a polar plot of the analyzed circuit.

  4. Select or deselect the S-parameter check boxes at the bottom of each plot to customize the parameters that the plot displays. Use the drop-down list at the top of each plot to customize the plot options.

    The plots automatically update as you change the check box and drop-down list options on the user interface.

  5. Click Data in the upper-right corner of the Analysis pane to view the data in tabular form. The following figure shows the analysis data for the LC Bandpass Pi component at the frequencies and reference impedance shown in step 2.


    The magnitude, in decibels, of S11 is listed in the 20log10[S11] column and the phase, in degrees, of S11 is listed in the <S11 column.

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