Guides to S-parameter files

Reference pages on working with Touchstone S-parameter files: what is inside them, what the parameters mean, and how to get from a file somebody sent you to the plot you needed. Each one answers a single question and is kept up to date rather than dated.

• How to open an .s2p file

  An .s2p file is a plain-text Touchstone file holding the S-parameters of a two-port network. What is inside one, how to read the option line and the column order, and four ways to open it — including one that needs nothing installed.

  Last updated 2026-09-21