Ham Radio Extra Class Practice Test 2025 - Free Extra Class License Exam Questions and Study Guide

A low Voltage Standing Wave Ratio (VSWR) indicates that the antenna is well-matched to the transmission line. This means that the impedance of the antenna is closely aligned with the impedance of the transmission line, usually 50 ohms for most radio applications. When the impedance match is good, most of the power sent from the transmitter is radiated as radio waves by the antenna, rather than being reflected back toward the transmitter.

Additionally, a low VSWR implies minimal reflection of the signal, which helps in efficient transmission and prevents damage to the transmitter caused by reflected power. This characteristic is crucial for ensuring effective communication and optimizing the performance of an amateur radio station.

High VSWR values would suggest that the antenna may be poorly matched or possibly damaged, resulting in significant reflections. Thus, knowing that a low VSWR means a good match clarifies the importance of antenna setup and tuning in radio operations.