Calculadora de VSWR — Fórmula
## What is VSWR?
VSWR (Voltage Standing Wave Ratio) measures impedance mismatch between a transmission line and its load. A perfect match is 1:1.
### Formulas
**Gamma = |Z_load - Z_0| / |Z_load + Z_0|**
**VSWR = (1 + Gamma) / (1 - Gamma)**
**Return Loss = -20 x log10(Gamma) dB**
### Interpretation
- VSWR 1.0: Perfect match (0% reflected)
- VSWR 1.5: Good match (4% reflected)
- VSWR 2.0: Acceptable (11% reflected)
- VSWR 3.0+: Poor match (25%+ reflected)
VSWR (Voltage Standing Wave Ratio) measures impedance mismatch between a transmission line and its load. A perfect match is 1:1.
### Formulas
**Gamma = |Z_load - Z_0| / |Z_load + Z_0|**
**VSWR = (1 + Gamma) / (1 - Gamma)**
**Return Loss = -20 x log10(Gamma) dB**
### Interpretation
- VSWR 1.0: Perfect match (0% reflected)
- VSWR 1.5: Good match (4% reflected)
- VSWR 2.0: Acceptable (11% reflected)
- VSWR 3.0+: Poor match (25%+ reflected)
Ejemplo Resuelto
75 ohm load on a 50 ohm transmission line.
- Gamma = |75 - 50| / |75 + 50| = 25 / 125 = 0.2000
- VSWR = (1 + 0.2) / (1 - 0.2) = 1.2 / 0.8 = 1.50
- Return loss: -20 x log10(0.2) = 13.98 dB
- Power reflected: 0.04 = 4.0%