What effect does high SWR have on an antenna system?

What effect does high SWR have on an antenna system?

• A. It enhances the signal clarity
• B. It can increase the power output
• C. It contributes to higher lost signals
• D. It provides better matching

Answer: (C)

High Standing Wave Ratio (SWR) occurs when there is a significant mismatch between the impedance of the antenna and the transmission line or the radio transmitter. This mismatch leads to a portion of the power being reflected back towards the source rather than being transmitted out effectively. As a result, when SWR is high, it can lead to higher losses within the antenna system, causing a reduction in the effective radiated power and a decrease in the overall efficiency of the communication system. The remaining power that does get transmitted may not have the same clarity or quality due to the mismatch, ultimately contributing to lost signals and reduced performance. In contrast, a low SWR indicates a good match, allowing more power to be radiated effectively, which enhances signal clarity and communication quality. Therefore, recognizing and addressing high SWR in an antenna system is crucial for ensuring optimal performance.

High Standing Wave Ratio (SWR) occurs when there is a significant mismatch between the impedance of the antenna and the transmission line or the radio transmitter. This mismatch leads to a portion of the power being reflected back towards the source rather than being transmitted out effectively.

As a result, when SWR is high, it can lead to higher losses within the antenna system, causing a reduction in the effective radiated power and a decrease in the overall efficiency of the communication system. The remaining power that does get transmitted may not have the same clarity or quality due to the mismatch, ultimately contributing to lost signals and reduced performance.

In contrast, a low SWR indicates a good match, allowing more power to be radiated effectively, which enhances signal clarity and communication quality. Therefore, recognizing and addressing high SWR in an antenna system is crucial for ensuring optimal performance.