THE IMPACT OF VSWR ON POWER MEASUREMENTS FOR ANTENNAS AND RF SYSTEMS'

摘要

This paper presents a pragmatic approach in the determination and measurement of RF Power on RF systems in the presence of Voltage Standing Waves Ratio (VSWR). Information is provided to determine the RF Power measurement ambiguities produced by the VSWR of cables, pads and loads which ultimately affect and perturb the readings associated with both CW and Peak Power meters. A comparison of presently available commercial RF Power Meters is also provided which include their maximum metering ambiguities, their performance under dynamic range and their absolute metering accuracies. The paper also provides a simple equation for determining your system ambiguities (in dBs) based on the aggregate of the individual components within the RF path and their individual VSWR effects. Experimental data and calculated data are also presented with excellent correlation. Recommendations are also provided in the process of enhancing RF power measuring procedures.