title: A simple and reliable technique to characterize amplitude to phase modulation distortion for high-frequency amplifiers and nonlinear devices.
abstract: This paper presents a simple and reliable measurement system for characterizing the amplitude to phase modulation (AM-PM) characteristics of high frequency amplifiers and nonlinear devices. The AM-PM measurement system is based on a null detector implemented with a double balanced mixer, and requires a voltmeter and a calibrated phase shifter. A 12 W class A radio frequency power amplifier has been designed using a GaN transistor, and the AM-PM has been measured using both the method proposed in this work and the classical method with a calibrated vector network analyzer. A good correlation between both methods is observed, which validates the proposed method.
authors.affiliation: Department of Electricity and Electronics, University of the Basque Country, Leioa 48040, Spain.
authors.forename: Rigoberto
authors.initials: R
authors.lastname: Jauregui
authors.forename: Joaquin
authors.initials: J
authors.lastname: Portilla
authors.forename: J A
authors.initials: JA
authors.lastname: Reynoso-Hernández
authors.forename: F I
authors.initials: FI
authors.lastname: Hirata-Flores