Patent ID: 6292000
Filing Date: 2001-09-18
Classification: G01R

Abstract:
A method for removing a source signal harmonic from a measurement of a harmonic phase response of a device under test (DUT) at a harmonic frequency by using a vector network analyzer (VNA) containing a signal source generating the source harmonic, the method comprising the steps of:providing a phase reference .angle.refx for the harmonic frequency;determining a fundamental vector transfer response GN1 of the DUT to a first source signal at a fundamental frequency;obtaining a harmonic vector transfer response GHx of the DUT at the harmonic frequency to an input which comprises an input fundamental frequency component at the fundamental frequency and an input harmonic component at the harmonic frequency;correcting the phase of the harmonic vector transfer response GHx to obtain a corrected phase .angle.GHxC;subtracting the corrected phase .angle.GHxC of the harmonic vector transfer response GHx from the phase reference .angle.refx to obtain a difference .angle.refx-.angle.GHxC; andadding the phase of the fundamental vector transfer response GN1 to the difference .angle.refx-.angle.GHxC to obtain the harmonic phase response .angle.POx.