# voltage standing-wave ratio

## Definitions

### Electronics

- For a given transmission line, such as a coaxial cable or
__waveguide__, the__ratio__of the maximum voltage to the minimum voltage. It is a measure of the impedance matching of the line. This ratio is__equal__to 1 when there is complete impedance matching, in which case the__maximum__possible__RF power__that reaches the__load__, such as an antenna. Its abbreviation is VSWR. Also called standing wave ratio (1). - acronymVSWR