TouchstoneLab

A web-based Touchstone (.s1p, .s2p, .s3p, .s4p) S-Parameter analysis tool built with Plotly.js and TailwindCSS.

TouchstoneLab enables engineers to visualize, analyze, and measure RF network parameters directly in the browser --- no installation required.

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🚀 Features

• Full Touchstone file support (.s1p / .s2p / .s3p / .s4p)
• Multi-dataset overlay
• Magnitude (dB)
• Phase (deg)
• Return Loss (dB)
• VSWR
• Group Delay (ns)
• Impedance (R + jX)
• Interactive Smith Chart
• Marker placement with data table
• Automatic bandwidth measurement
• Log / Linear frequency scaling
• Custom frequency range input (k / M / G supported)
• Responsive layout (desktop + mobile)
• Double-click fullscreen plots
• Fully client-side (no server required)

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📷 Overview

TouchstoneLab provides a modern RF-style dark UI optimized for high-clarity engineering visualization.

Ideal for: - RF Engineers - Antenna Designers - PCB Designers - SDR Developers - Microwave Engineers - Students working with VNA measurements

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🛠 How It Works

The application:

1. Parses Touchstone files
2. Converts S-parameters to complex form (RI / MA / DB supported)
3. Computes:
   • Magnitude
   • Phase (unwrapped)
   • Return Loss
   • VSWR
   • Group Delay
   • Impedance from reflection coefficient
4. Renders interactive plots using Plotly.js

All processing happens locally in your browser.

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📊 Bandwidth Measurement

Bandwidth can be measured based on:

• Return Loss threshold
• Insertion Loss threshold

Automatic detection switches between RL and IL based on selected S-parameter.

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📜 License

MIT License

You are free to use, modify, and distribute this software.