Standard Tier Module
S-Parameter / Touchstone Toolkit
Import a Touchstone file (.s1p / .s2p / .snp) straight from your VNA, EM simulator or scikit-rf and get VSWR, return / insertion loss, group delay, two-port stability (K / mu / |Delta|) and passivity / reciprocity physical checks - plotted on a reflection plane and vs frequency - then export back to Touchstone or CSV.
See it run - a worked example, 100% in this browser tab
What it is
Import a Touchstone file (.s1p / .s2p / .snp) straight from your VNA, EM simulator or scikit-rf and get VSWR, return / insertion loss, group delay, two-port stability (K / mu / |Delta|) and passivity / reciprocity physical checks - plotted on a reflection plane and vs frequency - then export back to Touchstone or CSV. Standard, published S-parameter math; a verification / analysis companion to your bench, not a replacement for it.
Honest scope
Deterministic and citation-backed: every figure is exact arithmetic or a cited rule. Any year- or jurisdiction-indexed value is a confirmable input, never an eternal hardcode. This is a computation tool, not professional (legal, tax, medical, or financial) advice - confirm against the controlling authority for your context.
Authorities cited
- D. M. Pozar, Microwave Engineering, 4th ed., Wiley 2012. Ch. 4 (S-parameters, VSWR, return loss) and Ch. 12 (two-port stability: Rollett K factor, |Delta|).
- M. L. Edwards & J. H. Sinsky (1992). A new criterion for linear 2-port stability using a single geometrically derived parameter (mu). IEEE Trans. MTT 40(12), 2303-2311.
- Touchstone File Format Specification, v1.1 (EIA/IBIS Open Forum, 2002). The .sNp option line and 2-port column ordering used here.
- scikit-rf project, https://scikit-rf.readthedocs.io - reference open-source implementation of the same Touchstone I/O and network algebra.
Run it on your own data
Open it inside GDBS to save runs to Sandbox, attach results to a Worklog case, or share through a Gate client portal - all in the browser, nothing uploaded to anyone’s cloud.