Use this handy Smith Chart web app to create matching networks. Easiest tool to use: drag elements right on the chart! Supports multiple frequencies, transmission line elements, etc. Note: please register for a free account for continued access to the Smith Chart app.
New HTML 5 Version Now Available A new version of the popular Smith Chart app that does not require any plug-in has now replaced the older Java applet version.
The older Java plug-in based version is still available here.