Return Loss Calculator
Calculate return loss, VSWR, and reflection coefficient
Input Parameters
Z₀
50Ω
96%
4%
ZL
75Ω
Analysis Results
marginal Match
Marginal match. Consider impedance matching.
Return Loss
13.98 dB
VSWR
1.50:1
|Γ|
0.200
Mismatch Loss
0.177 dB
Power Transmitted
96.0%
Power Reflected
4.0%
Return Loss = -20×log₁₀(|Γ|). Higher is better. Target ≥15dB for good match.
Return Loss Reference
≥20 dBExcellent
15-20 dBGood
10-15 dBMarginal
<10 dBPoor
Key Formulas
Γ = (ZL - Z0) / (ZL + Z0)
RL = -20 × log10(|Γ|)
VSWR = (1 + |Γ|) / (1 - |Γ|)