// S-Parameters › De-embedding

S-Parameter De-embedding

Remove fixture parasitics from measured S-parameters to recover the true DUT response. Upload the raw measurement and fixture S-parameter files — the tool computes the de-embedded DUT and overlays all three on a single plot.

// How to use
1
Upload the raw measurement — the .s2p file measured with fixtures (cables, connectors, PCB launch) still in place.
2
Upload Fixture 1 (Port 1 side) — S-parameters of the left fixture, measured separately by TRL, LRM, or Open-Short calibration.
3
Upload Fixture 2 (Port 2 side) — S-parameters of the right fixture. Leave empty for single-sided de-embedding.
4
T-Matrix method cascades T_fix1⁻¹ · T_raw · T_fix2⁻¹. Frequencies are auto-interpolated to the raw grid. Supports MA, RI, DB format.
5
Click De-embed — four overlay plots show Raw vs DUT for S11, S21, S12, S22. Download the result as a .s2p file.
// Raw Measurement (DUT + Fixtures)
📡
Drop .s2p here
or click to browse
// Fixture 1 — Port 1 Side
🔌
Drop .s2p here
or click to browse
// Fixture 2 — Port 2 Side (optional)
🔌
Drop .s2p here
(leave empty for 1-port de-embed)
// De-embedding Method
// Theory
T-matrix cascade:
Traw = Tfix1 · TDUT · Tfix2
TDUT = Tfix1⁻¹ · Traw · Tfix2⁻¹

S → T: T₁₁=−|S|/S₂₁ · T₁₂=S₁₁/S₂₁ · T₂₁=−S₂₂/S₂₁ · T₂₂=1/S₂₁
T → S: S₁₁=T₁₂/T₂₂ · S₁₂=|T|/T₂₂ · S₂₁=1/T₂₂ · S₂₂=−T₂₁/T₂₂

Fixtures are interpolated to the raw measurement frequency grid.
🔬
Upload raw + at least one fixture, then click De-embed.
MA / RI / DB Touchstone · s1p / s2p