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VSWR (Voltage Standing Wave Ratio) is a metric commonly used with antenna systems for ham or shortwave radio communication.VSWR is normally defined as a ratio with a 1:1 VSWR, indicating that there is an exact or perfect match between all antenna system elements.SWR (Voltage Standing Wave Ratio) is a metric commonly used with antenna systems for ham or shortwave radio communication.
Application Note AN058. When matching an antenna a VSWR of 1.5 (RL = 14 dB) is a good match, when the VSWR is. > 2.0 (RL = 9.5 dB) then the matching network should be reviewed. VSWR of 2.0 (RL = 9.5. dB) is usually used as the acceptable match level to determine the bandwidth of the antenna.