In radio engineering and telecommunications, standing wave ratio (SWR) is a measure of impedance matching of loads to the characteristic impedance of a transmission line or waveguide. Impedance mismatches result in standing waves along the transmission line, and SWR is defined as the ratio of the partial standing wave's amplitude at an antinode (maximum) to the amplitude at a node (minimum) along the line.
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Voltage Standing Wave Ratio. VSWR is an indication of the degree of mismatch between the characteristic impedance of a transmission line and its load. If the line were terminated in its characteristic impedance, all forward power is absorbed, and there are no reflections. As the load varies from the characteristic impedance, some power is reflected back toward the source. Applied to amplifier specifications, VSWR is an indication of the degree to which the input and output impedance of the amplifier approaches 50 ohms, as well as to how the load presented to the amplifiers varies from 50 ohms. A VSWR of 1:1 indicates a peRFect match.
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Traductor de Inglés a Inglés Abbreviation forvoltage standing wave ratio. In a transmission line, the ratio of maximum to minimum voltage in a standing wave pattern. Note: The VSWR is a measure of impedance mismatch between the transmission line and its load. The higher the VSWR, the greater the mismatch. The minimum VSWR, i.e., that which corresponds to a perfect impedance match, is unity. (188 )