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sci.transmission-line-VSWR Calculator
Calculates voltage standing wave ratio VSWR = (1+|Γ|)/(1−|Γ|) from reflection coefficient Γ = (ZL−Z₀)/(ZL+Z₀). VSWR = 1 is perfect match; VSWR = 2 means 11% reflected power; VSWR = ∞ is open or short circuit — return loss RL = −20 log|Γ| is the alternative metric.
Inputs
Z0 Ohm
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Zl Real
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Zl Imag
Total opposition to AC current — combines resistance and reactance from capacitors/inductors.
Length Deg
Linear measurement. Ensure consistent units: 1 m = 1,000 mm = 3.281 ft.
Results
VSWR
Reference formula or conversion factor shown for context.
reflection coefficient |Γ|
Sample size or count used in the calculation.
return loss RL (dB)
The decrease or degradation from the baseline.
Γ = (ZL−Z0)/(ZL+Z0)
Reference formula or conversion factor shown for context.
mismatch loss (dB)
The decrease or degradation from the baseline.
VSWR class
The classification assigned based on the computed value.