Understanding Standing Wave Ratios
We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters.
SWR is a measure of a transceiver’s output power (Pf) verses the portion of that power reflected by the antenna system (Pr). If the antenna system is working well, most of the forward power will be radiated by the antenna with very little power reflected back to the transceiver. That is, the reflected power will be much less than the forward power (Pr << pt =" Pf" pr =" 0)."> 1 in most cases. From a practical point of view, SWR numbers in the range from 1:1 to 1.5:1 (1 <>
