Standing wave ratio (SWR)

Standing Wave Ratio (SWR), often referred to as Standing Wave Ratio (SWR), is a measure used in radio and telecommunications to evaluate how efficiently power is transmitted through a transmission line, like an antenna. It compares the amplitude of standing waves caused by reflected signals to the amplitude of the forward waves. An SWR of 1:1 is ideal, indicating that all power is being transmitted without reflection. Higher ratios indicate more power is being reflected back due to mismatched impedance, which can lead to losses and potential equipment damage. A lower SWR is typically better for optimal performance.