Which device might be used to measure the VSWR of a microwave transmission line?

The measurement of Voltage Standing Wave Ratio (VSWR) is essential for evaluating the efficiency and performance of microwave transmission lines. The correct option includes a combination of tools that are effective for this purpose.

Using a dual directional coupler, power meter, and network analyzer together allows for a comprehensive analysis of the transmission line. The dual directional coupler is specifically designed to sample the forward and reflected power in a transmission line, which is crucial for calculating VSWR. The power meter is then used to measure the magnitudes of both forward and reflected power, providing the necessary data to compute the VSWR.

Additionally, the network analyzer enhances the measurement capabilities by allowing for more detailed characterization of the transmission line, including impedance and reflection coefficients. It can also offer insights into frequency response and other relevant parameters that affect transmission line performance.

Together, these devices provide a robust framework for accurately determining VSWR, highlighting the importance of combining multiple measurement tools to achieve reliable results in microwave technology applications.