The useful model: SWR measures mismatch between a transmission line and its load at a reference plane; it does not distinguish radiated power from heat loss.
What controls the result
A dummy load has excellent SWR and almost no useful radiation. Conversely, an efficient antenna can present a high SWR until matched without changing its intrinsic radiation efficiency.
The misleading shortcut
Optimizing only for 1:1 can reward lossy coax, wet ground, resistor networks, or a hot transformer because loss makes impedance look easier.
Make the better decision
Check SWR for transmitter compatibility, then evaluate feed-line loss, component heating, current distribution, field strength or validated models, bandwidth, and the intended radiation pattern separately.
Evidence boundary
Propagation and antenna metrics are meaningful only with their frequency, path, geometry, reference plane, loss assumptions, and measurement method. Use current observations and the exact installed system.
