For Educators · Transmission Line
Transmission Line for a relay
Built for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs. Simulate a relay live below — adjust the inputs and watch it respond, right in your browser.
Transmission Line & VSWRLive
impedance matching · reflections
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When a transmission line meets a load that does not match its impedance, part of the wave reflects. Incident and reflected waves combine into a standing-wave pattern measured by the VSWR. A perfect match (RL = Z₀, XL = 0) gives VSWR 1 and no reflection — the goal of every antenna and RF design.
Data Inspector
Reflection |Γ|0.200
VSWR1.50 : 1
Return loss14.0 dB
Matchpoor
Governing equation
Reading this result: A large resistive mismatch reflects much of the wave, giving a high VSWR and deep nulls in the standing-wave pattern.
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Frequently asked questions
- Is this good for educators?
- Yes — this version of "Transmission Line for a relay" is framed for educators teaching it to a class. Drop a live demo into a lecture or assign it as a shareable link — no lab installs.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.