Voltage Standing Wave Ratio (VSWR)

Voltage Standing Wave Ratio (VSWR) measures how efficiently radio-frequency energy is transmitted from a source, like an antenna, into a load, such as a transmitter or receiver. When the transmitter and antenna are perfectly matched, all the energy flows smoothly, resulting in a VSWR of 1:1. If they are mismatched, some energy reflects back, creating standing waves along the cable. A higher VSWR indicates greater mismatch and more reflected energy, which can cause signal loss or equipment damage. Ensuring a low VSWR optimizes performance and protects your radio system.