H ghs n the low er to d- 30s.P a g e A 2. This will update the graphs on the simulation result page automatically.Ī couple of useful documents are located below for download.1 H : r 7 a : Good e Today s orecast: Cloudy w tl chance ce o lght snow o r - rrcczng ran. After making any changes, press F2 or go to the “Simulation” menu and click “Simulate” to re-run the simulation on your circuit. ![]() You can go back to the schematic window at any time, make changes to components or component values, or add/remove components, etc.Click OK and explore the Smith chart by adding markers. In this example I chose to display S for S11. Double-click the S-parameters you would like displayed to move them from the “Dataset” list on the left of the dialog box, which will insert them into the “Graph” list, as before. The “Edit Diagram Properties” dialog box will appear (as above in step 12) as soon as you released the left mouse button. To add a Smith chart, simply drag the Smith chart object from the main dock window (under diagrams) to a blank space under your Cartesian graph (for example).For example, dB information in a Cartesian graph, or S-parameter and complex impedance information on a Smith chart. Once the marker is placed, you can select it with the left mouse button, and use the left/right arrow keys to move the marker left/right along the trace, showing pertinent metrics about the trace at that point.You can place markers on any trace in any graph, by using the “Place Marker” icon in the toolbar.I find myself pressing the Escape key a lot when I’m moving and resizing graphs and markers, etc. QUCS GUI is a little clunky when it comes to grabbing and resizing graphs, but this can be done.Click OK and a small Cartesian graph of S11 and S21 will appear in the previously blank page.Double-click “dBS11” and “dBS21” in the “Dataset” list on the left of the dialog box, which will insert them into the “Graph” list on the right of this dialog box.S21 will essentially give us the graphed transfer function of the filter over the frequency range, illustrating how much power will appear at the output of the filter at any given frequency within the simulation range. S11 will show us the return loss looking into port 1 of the filter. This is where you will choose the data from the simulation to be displayed. ![]()
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