NanoVNA SWR Analyser

Analyze S-parameter/Touchstone files from your NanoVNA and visualize SWR data across amateur radio bands.

Upload S-Parameter File

Drag and drop your .s1p or .s2p file here, or click to browse

Supported formats: S1P, S2P (Touchstone)

About This Tool

This tool allows you to upload S-parameter/Touchstone files (.s1p or .s2p) exported from your NanoVNA or other vector network analyzers. It calculates and displays the Standing Wave Ratio (SWR) across amateur radio bands included within the file.

How to Use

  1. Connect your antenna to your NanoVNA and perform a sweep across the desired frequency range
  2. Export the measurement as an S1P file (for single-port measurements)
  3. Upload the file using the tool above
  4. Select the bands you want to analyze
  5. Review the SWR charts for each band

Supported File Formats

  • S1P - Single-port S-parameter files (S11 reflection data)
  • S2P - Two-port S-parameter files (includes S11, S21, S12, S22)

The tool supports Touchstone format files with various data representations: Real/Imaginary (RI), Magnitude/Angle (MA), and dB/Angle (DB).