# Voltage Standing Wave Ratio (VSWR) Calculator

The Voltage Standing-wave ratio, also (SWR) is a mathematical expression of the non-uniformity of an electromagnetic field on a transmission line such as coaxial cable. This calculator can be used to indicate the degree of mismatch between a transmission line and its load. Enter the value for VSWR in the below calculator to find out the values for Reflection Co-efficient, Reflected Power in % and Return loss in dB and the mismatch loss in dB. Enter VSWR value other than 1 or 0. The negative values in the mismatch loss field indicates the loss of signals.

## Return, Mismatch Loss Calculator

The Voltage Standing-wave ratio, also (SWR) is a mathematical expression of the non-uniformity of an electromagnetic field on a transmission line such as coaxial cable. This calculator can be used to indicate the degree of mismatch between a transmission line and its load. Enter the value for VSWR in the below calculator to find out the values for Reflection Co-efficient, Reflected Power in % and Return loss in dB and the mismatch loss in dB. Enter VSWR value other than 1 or 0. The negative values in the mismatch loss field indicates the loss of signals.

Code to add this calci to your website

#### Formula:

|Γ| = (v-1) / (v+1)
p = 100 * Γ ^{2}
d = 20 * Log(Γ)
l = 10 * Log(1 - Γ^{2})
**Where,**
v = Voltage Standing Wave Ratio
Γ = Reflection Coefficient
p = Reflected Power
d = Reflected Power(dB)
l = Mismatch Loss

#### Reflection Coefficient

**If VSWR is 1.5, then the**

|Γ| = (v-1) / (v+1)

= (1.5 - 1 ) / (1.5+1)

= 0.5 / 2.5

= 0.2

Therefore, |Γ| value is 0.2

#### Reflected Power

p = 100 * Γ^{ 2}

= 100 * 0.2^{ 2}

= 100 * 0.04

= 4

Therefore, p value is 4%

#### Reflected Power(dB)

d = 20 * log(Γ)

= 20 * log(0.2)

= 20 * -0.69897

= -13.9794

Therefore, d value is -13.9794 dB

#### Mismatch Loss

l = 10 * Log(1 - Γ^{2})

= 10 * log(1 -0.2^{2})

= 10 * log(0.96)

= 10 * (-0.017728)

=-0.177

Therefore, l value is -0.177 dB