# 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