Wideband Microwave Phase Shift Measurement Technique

Abstract

This paper presents the design and analysis of a new method for measuring the phase shift between two microwave signals. The proposed method operates in S and C band applications. It covers the frequency range from 2 GHz to 8 GHz. The configuration of this method is based on distinguishing the reference (REF) and measured device under test (DUT) signals from each other by passing them through two different parallel paths. A reference phase shifter is inserted to achieve the difference between the two paths. The phase shift value of the phase shifter used for this system is designed to be 90° degrees. In each stage of this method, the magnitude of the power level is measured. Their values are used to calculate the phase shift between the REF and measured DUT signals. The system performance and accuracy results are investigated. It shows a maximum phase deviation of $\pm 3.5^{\circ}$.