Which device is used to measure the SWR of an antenna system?

The SWR (Standing Wave Ratio) Meter is specifically designed to measure the efficiency of an antenna system. It indicates how well an antenna is matched to the transmission line and the connected transmitter. A low SWR value suggests that most of the power being transmitted is radiated by the antenna, while a high SWR indicates that power is being reflected back to the transmitter, which can lead to potential damage if sustained.

SWR meters work by comparing the power that is being sent to the antenna with the power that is being reflected back. This measurement is critical in ensuring optimal performance of the antenna and helps in troubleshooting potential issues with antenna installations or adjustments.

While a multimeter is great for measuring voltage, current, and resistance, it does not have the capability to measure RF signals or standing wave ratios specifically. An oscilloscope can visualize waveforms but does not provide measurements related to SWR. An antenna analyzer is more versatile, offering various metrics about antenna performance, including SWR, but the device that primarily focuses on SWR measurement is the SWR Meter.