Hello @rtk ,

Voltage SWR can be given mathematically in terms of reflection coefficient as **VSWR = (1+|Г|)/(1-|Г|)**, where **|Г|** denotes the magnitude of reflection coefficient. So, the range of VSWR depends upon the range of reflection coefficient. Theoretically, SWR ranges between 1 and Infinity and it is a nonlinear function. For an optimum design, the SWR value should be close to 1. Higher values of SWR denote more reflected waves which in turn can damage the source.

Hope that addressed your concern! ?