What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line?

Standing Wave Ratio (SWR) measures the ratio of maximum to minimum voltage along a transmission line. When the impedance of the antenna perfectly matches the feed line, all the power is transferred to the antenna and none is reflected back. In this ideal scenario, there are no standing waves on the line. The ratio compares the total voltage to the forward voltage, which results in a mathematical ratio of exactly 1 to 1 (1:1). Distractors like "Zero" are incorrect because SWR is a ratio; mathematically, the lowest possible value for this ratio is 1:1, not zero. A "50:50" ratio is simply a made-up distractor trying to trick you with the standard 50-ohm impedance number.