In contrast to Return Loss, VSWR displays the match of the system linearly. VSWR measures
the ratio of voltage peaks and valleys. If the match is not perfect, the peaks and valleys of
the returned signal will not align perfectly with the transmitted signal and the greater this
number is, the worse the match is. A perfect or ideal match in VSWR terms would be 1:1.
A more realistic match for a cable & antenna system is in the order of 1.43 (15 dB). Antenna
manufacturers typically specify the match in VSWR. The scale of a VSWR is usually defaulted
to setup between 1 and 65.