Changes

The Smith chart is a very useful graphical tool for RF engineers. [[RF.Spice A/D]] allows you to plot the S-[[parameters]] of your circuit on the Smith Chart. For this purpose, open the Network Analysis Test Panel of the Toolbox once again, and this time choose the '''S''' radio button in the "Parameter Set" section of the Output tab. For the "Graph Type", check the "Smith" checkbox. In order to better view the data points on the Smith chart, change the step size to 500MHz in the Sweep tab of the test panel. Run a network analysis of your RF circuit and with the following [[parameters]]: {| border="0"|-| valign="top"||-{| class="wikitable"|-! scope="row"| Start Frequency| 1G|-! scope="row"| Stop Frequency| 5G|-! scope="row"| Steps/Interval| 250Meg|-! scope="row"| Interval Type| Linear|-! scope="row"| Parameter Set| S|-! scope="row"| Graph Type| Smith|} At the end of the simulation, view the resulting Smith chart. Sometime, the program tries to fit the graph to the size of the graph window. If your graph window is elongated, the Smith chart will look elliptical. To make it circular, click on the graph window's title tab to make it active. Then open the '''Edit Graph''' tab of the Toolbox and press the {{key|Circle}} button/tab at the top of the panel. Then check box labeled '''Plot Circular Chart (Not Elliptical)'''.