Enter the power transmitted and the voltage standing wave ratio (VSWR) into the calculator to determine the mismatch loss in decibels (dB).
Mismatch Loss Formula
The following formula is used to calculate the mismatch loss:
ML = 10 * log10(1 - ((VSWR - 1) / (VSWR + 1))^2)
Variables:
- ML is the mismatch loss (dB)
- VSWR is the voltage standing wave ratio (unitless)
To calculate the mismatch loss, use the formula above where ML is the mismatch loss in dB and VSWR is the voltage standing wave ratio.
What is Mismatch Loss?
Mismatch loss occurs when there is an impedance mismatch in the transmission line, which leads to a portion of the transmitted power being reflected back towards the source. This loss is expressed in decibels (dB) and can be calculated using the voltage standing wave ratio (VSWR), which is a measure of how well the transmission line is matched to its load.
How to Calculate Mismatch Loss?
The following steps outline how to calculate the Mismatch Loss:
- First, determine the power transmitted through the transmission line.
- Next, determine the voltage standing wave ratio (VSWR).
- Use the formula ML = 10 * log10(1 – ((VSWR – 1) / (VSWR + 1))^2) to calculate the mismatch loss.
- Finally, enter the VSWR into the calculator to find the mismatch loss in dB.
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Power transmitted through the transmission line = 100 watts
Voltage standing wave ratio (VSWR) = 2
