Enter the Voltage Standing Wave Ratio into the calculator to determine the Return Loss.

Vswr To Rl Formula

The following formula is used to calculate the Return Loss (RL) from Voltage Standing Wave Ratio (VSWR).

RL = 20 * log10((VSWR + 1) / (VSWR - 1))


  • RL is the Return Loss (dB) VSWR is the Voltage Standing Wave Ratio

To calculate the Return Loss, add 1 to the VSWR and divide the result by the VSWR minus 1. Then, take the logarithm base 10 of the result and multiply it by 20.

What is a Vswr To Rl?

VSWR (Voltage Standing Wave Ratio) to RL (Return Loss) is a conversion used in radio frequency (RF) engineering to measure the efficiency of power transmission. VSWR is a measure of the mismatch between the load impedance and the transmission line impedance, which can result in power being reflected back towards the source.

Return Loss is a measure of the power reflected back to the source, expressed in decibels. Therefore, a high VSWR indicates a high level of power reflection, or low RL, and vice versa. The conversion between these two measures helps engineers optimize the power efficiency of RF systems.