Study of phase and amplitude-phase methods for measuring a reactive element quality factor

The paper considers improving accuracy of measured parameters and quality factors of reactive components. To increase the accuracy of measurement, circuit diagrams of new measuring transducers for measuring the quality factor of reactive elements for operation in a wide range of frequencies are developed. These measuring transducers provide reducing the standard uncertainty of the quality factor measurement for reactive elements with a slight complication of the measuring instrument. A phase and amplitude-phase methods of measuring the quality factor of reactive elements are considered, which provide the measurement standard uncertainty reduction. These methods have a relatively high measurement accuracy and are easy to implement on the microprocessor-based technology. Quality factors of inductive and capacitive elements are shown to be determined by measuring the phase shift angle between two output voltages of the measuring transducer. A prototype of the measuring transducer was installed to verify experimentally obtained theoretical results. Studies were performed for three inductors of different types and for low-power high-frequency capacitors. Theoretical and experimental dependences were investigated and compared.