VSWR / Return Loss Converter
Convert between VSWR, return loss, reflection coefficient, mismatch loss and transmitted power — the usual first step with a VNA reading or antenna datasheet.
Key points
VSWR / Return Loss Converter: Convert between VSWR, return loss, reflection coefficient, mismatch loss and transmitted power — the usual first step with a VNA reading or antenna datasheet. Formula: Γ = (VSWR−1)/(VSWR+1) ｜ RL = −20·log₁₀|Γ| ｜ mismatch loss = −10·log₁₀(1−|Γ|²). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Worth memorising: VSWR 1.5 = RL 14dB = 4% reflected; VSWR 2.0 = RL 9.5dB = 11% reflected. Higher return loss is better, lower VSWR is better — same thing described two ways, do not mix them up.
Inputs
Γ = (VSWR−1)/(VSWR+1) ｜ RL = −20·log₁₀|Γ| ｜ mismatch loss = −10·log₁₀(1−|Γ|²)Calculation model (updates with parameters)
| VSWR | 1.500 : 1 | |
| Return loss RL | 13.98 dB | |
| Reflection coefficient |Γ| | 0.2000 | 20.00% Voltage反射 |
| Mismatch loss (ML) | 0.177 dB | |
| Reflected power | 0.0400 W（4.00%） | |
| Power delivered to load | 0.9600 W（96.00%） |
Engineering notes
- Worth memorising: VSWR 1.5 = RL 14dB = 4% reflected; VSWR 2.0 = RL 9.5dB = 11% reflected.
- Higher return loss is better, lower VSWR is better — same thing described two ways, do not mix them up.
FAQ
- What is VSWR / Return Loss Converter for?
- Convert between VSWR, return loss, reflection coefficient, mismatch loss and transmitted power — the usual first step with a VNA reading or antenna datasheet.
- What is the formula for VSWR / Return Loss Converter?
- Core formula: Γ = (VSWR−1)/(VSWR+1) ｜ RL = −20·log₁₀|Γ| ｜ mismatch loss = −10·log₁₀(1−|Γ|²). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using VSWR / Return Loss Converter?
- Worth memorising: VSWR 1.5 = RL 14dB = 4% reflected; VSWR 2.0 = RL 9.5dB = 11% reflected. Higher return loss is better, lower VSWR is better — same thing described two ways, do not mix them up.