Nonlinear Three-Port Characterization of a Class-G Supply Modulated RF Power Amplifier using a Nonlinear Vector Network Analyzer
F.F. Tafuri1,2, T.S. Nielsen2, N. Wolff3, O.K. Jensen1, J.H. Mikkelsen1, O. Bengtsson3
Published in:
48th European Microwave Conference (EuMC 2018), Madrid, Spain, Sep. 25-27, pp. 33-36 (2018).
Abstract:
A three-port nonlinear characterization system for 5G Envelope Tracking Power Amplifiers (ET PAs) is presented in this paper. The system allows measurement of wideband injected and reflected Radio Frequency (RF) power waves calibrated at the reference planes of the Device Under Test (DUT). A third calibrated port for wideband voltage and current measurements of the supply modulated Low Frequency (LF) port is established to obtain a complete three-port data-set for characterization and modeling of ET PAs. Measurements of a multi-tone signal with 2 MHz instantaneous bandwidth, on a state-of-the-art ET PA with Class-G, i.e. discrete level supply modulation, are reported as an example of the capabilities of the presented measurement platform.
1 Department of Electronic Systems, Aalborg University, Aalborg, Denmark
2 Keysight Laboratories, Keysight Technologies Inc., Aalborg, Denmark
3 Ferdinand Braun Institut (FBH), Leibniz-Institut fuer Hoechstfrequenztechnik, 12489 Berlin, Germany
Keywords:
nonlinear measurements, envelope tracking, power amplifiers, class-G, performance network analyzer.
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