PHASE MEASUREMENT, TRACEABILITY, AND VERIFICATION THEORY AND PRACTICE

Presently available technology allows the construction of phase calibration equipment with phase resolutions of at least one part in 218, that is a phase resolution of 0.00137°. The users and the manufacturers of such equipment are faced with the practical problem of verifying their phase accuracy—both relative and absolute—and their traceability to some more accurate source. This paper presents measurement methods that allow both relative and absolute, high resolution phase determinations in the vicinity of angles of 0°, 60°, 90°, and 180°. It also presents practical methods of implementing all of these methods together with comparative experimental data from all of them. © 1990 IEEE