~ LA8OKA Martin ~

Transmission line loss due to SWR.

Many are not aware of the additional losses created in a transmission line due to high SWR, the calculator below shows the total line loss and the additional line loss you will have in your transmission line at a certain level of SWR.

In order to get a good calculation, measure the SWR directly at your antenna (the load) with an antenna analyzer or an SWR-meter and measure the loss of the transmission line with an antennna analyzer or a two-port vector network analyzer.
Please refer to the operating manual for your instrument for instructions on how to make the specific measurements.

Line loss calculator for lines with SWR
SWR at the load:  
Matched line loss [dB]:  
Additional line loss due to SWR [dB]:  
Total line loss [dB]:  



This page was last updated: 13.05.2017