smith-chart

Xnec2c is a high-performance multi-threaded electromagnetic simulation package to model antenna near- and far-field radiation patterns for Linux and UNIX operating systems.

Lightweight cross-platform RF circuit simulator — DC, S-parameters, harmonic balance, loadpull. Not a SPICE simulator.

Fast, interactive Julia/GTK+ plots (+Smith charts +Gtk widget +Cairo-only images)

NanoVNA RF learning board with SMA connectors for practical demos, experiments, and teaching.

Free browser-based Smith chart for impedance matching. Ladder networks, VSWR, Q, Touchstone import, amplifier design. No install.

Parametric analysis/visualization of model/measurement/simulation results

This is a collection of open source, free to use and/or abandonware tools for Amateur radio.

RF matching network synthesizer, optimizer, and S-parameter analyzer with live VNA control

CAD tool for designing RF and microwave circuits.

Smith Chart

GTK4 Drawing Area widget displaying a detailed Smith chart

Design and analytical synthesis of a 15 GHz Ku-band microwave low-noise amplifier based on the ATF-26884 GaAs pHEMT transistor and Rogers RO4350B substrate. Features Mathcad matching derivations, CST 3D electromagnetic simulations, and Altium Designer PCB layouts.

Graphical Impedance Matching and Smith Chart - cloned from floppy drive source

Design, analytical synthesis, and numerical simulation (Cadence AWR MWO) of a reactive L-section impedance matching network for the 2SK2974 UHF power MOSFET at 1.2 GHz, transforming complex sub-ohm port impedances to 50-ohm terminals.

Local antenna and RF plotting app for HFSS, CST, ADS and VNA data, with S-parameters, radiation patterns, Smith charts and publication-ready exports.

Complex impedance plane on a sphere with paired positive and negative resistance charts. Rust, egui, native and WebAssembly.

A quick start project that shows how to create and configure the Syncfusion Vue Smith Chart component in a Vue application. This sample explains how to populate list data, add legends, and enable data labels and tooltips.

Designing Amplifier based on S-parameters

Offline VS Code preview and comparison for Touchstone S2P files with Smith charts and dB plots.