##  [Voltage Standing Wave Ratio](/index.php/voltage-standing-wave-ratio) 

  ##  [Voltage Standing Wave Ratio](https://engineering.quantumdictionary.io/voltage-standing-wave-ratio-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

Voltage Standing Wave Ratio (VSWR) is a dimensionless measure of the amplitude ratio between maximum and minimum voltage along a transmission line caused by reflections; for line-referenced magnitude VSWR = (1+|Γ|)/(1-|Γ|), where |Γ| is the magnitude of the voltage reflection coefficient. VSWR = 1 indicates a perfect match.