Assessing the movement of microwave cables by statistical indicators

In order to reduce the uncertainties of measurement in anechoic chamber, we wish to know and quantify the impact of the movement of a cable on the reflection coefficient. When the cable is subjected to constraints on a motorized arm, the quality and movements of the cables are important to control to obtain an accurate measurement. Measurements were made on an automatic bench designed to perform a vertical displacement of a cable with different radii of curvature of the cable. A study was therefore conducted to quantify through statistical comparison indicators taking into account the measurements uncertainties if two curves are really equivalent after a movement of the cables.