What does VSWR stand for?

What does VSWR stand for?

• A. Voltage Standing Wave Ratio
• B. Voltage Scale Wave Ratio
• C. Variable Standing Wave Rate
• D. Volt Signal Wave Ratio

Answer: (A)

Voltage Standing Wave Ratio describes how well a transmission line is matched to its load. When there’s any impedance mismatch, part of the forward wave reflects back toward the source and interferes with the incoming wave, creating standing waves along the line. VSWR is the ratio of the maximum to minimum voltage along the line (Vmax/Vmin). It can also be written in terms of the reflection coefficient Γ as VSWR = (1+|Γ|)/(1−|Γ|). A perfect match yields VSWR = 1 (no reflections); larger values indicate more reflection and poorer matching. The other terms don’t correspond to the standard RF terminology for this concept.

Voltage Standing Wave Ratio describes how well a transmission line is matched to its load. When there’s any impedance mismatch, part of the forward wave reflects back toward the source and interferes with the incoming wave, creating standing waves along the line. VSWR is the ratio of the maximum to minimum voltage along the line (Vmax/Vmin). It can also be written in terms of the reflection coefficient Γ as VSWR = (1+|Γ|)/(1−|Γ|). A perfect match yields VSWR = 1 (no reflections); larger values indicate more reflection and poorer matching. The other terms don’t correspond to the standard RF terminology for this concept.