QuickSmith - Free online Smith chart and impedance matching

Operating a station effectively often requires precise impedance matching, and QuickSmith provides an intuitive online Smith chart for this purpose. Users can drag virtual components onto a ladder network, observing the trace move dynamically on the chart, with live readouts for critical parameters like VSWR, return loss, insertion loss, loaded Q, and bandwidth. The tool facilitates auto-matching to 50 ohms with various network choices, and supports Touchstone file import, allowing NanoVNA measurements to be plotted directly.

Beyond basic matching, QuickSmith includes features for frequency and component sweeps, generating S11 and S21 response graphs. It also supports amplifier design, incorporating stability, gain, and noise circles, alongside microstrip and coax synthesis capabilities. The platform offers shareable links, worked examples, and guided tours, making it a practical resource for hams learning about RF circuit analysis and antenna optimization.