Detailed analysis of quality assurance aspects concerning the mechanically adjustable precision microwave passive phase shifter

Abstract

The conducted research includes a complete set of quality assurance considerations needed to produce the mechanically adjustable microwave precision passive phase shifter. As the detailed and complete discussion of the device quality assurance aspects was missing, the question of what are the most influential quality assurance aspects of the discussed device responsible for the correct operation under various operating conditions was answered in the work. Furthermore, the utilized triangulation method has provided the results from three unique viewpoints, including the literature review, expert interview as well as CAD modelling. The novel approach regarding the quality assurance allowed for a detailed description of the QA actions not only after but also before and during the manufacturing stages of the device and its components. Moreover, combined with expert interview data, it enabled the creation of a digital twin of the real device. Consequently, the research question was answered successfully by deriving the conclusion from the combination and comparison of the triangulation method results. Hence, the most important quality aspects were identified, leading with the geometry and shape of PTFE element at the same time including the copper strip zone, dimensioning and tolerances as well as proper material selection, were discussed in the conclusions. Additionally, research has addressed the gap in existing literature regarding the quality assurance aspect of the examined phase shifter, at the same time introducing new possibilities for further study in the discussed area. Eventually, the work utilized a reliability analysis tool, which led to verified conclusions. Hence, it poses as a great base for further investigation of the topic.