Active baseband drain-supply terminal load-pull of an X-band GaN MMIC PA

In this paper, we present a linearity and efficiency investigation of a GaN MMIC power amplifier (PA) designed for supply modulation, by low-frequency (LF) active load-pull at the drain supply terminal, with the PA operating under RF carrier large signal excitation. The baseband load-pull is performed at frequencies up to 6 MHz while the PA is operating at 10 GHz.

[1]  Anthony E. Parker,et al.  Effect of baseband impedance on FET intermodulation , 2003 .

[2]  G. Avolio,et al.  On-Wafer LSNA measurements including dynamic-bias , 2009, 2009 European Microwave Conference (EuMC).

[3]  Bumman Kim,et al.  Push the Envelope: Design Concepts for Envelope-Tracking Power Amplifiers , 2013, IEEE Microwave Magazine.

[4]  Dongsu Kim,et al.  Analysis of Envelope-Tracking Power Amplifier Using Mathematical Modeling , 2014, IEEE Transactions on Microwave Theory and Techniques.

[5]  Alberto Rodriguez,et al.  Buck-Derived Converters Based on Gallium Nitride Devices for Envelope Tracking Applications , 2015, IEEE Transactions on Power Electronics.

[6]  B. Bunz,et al.  Influence of envelope impedance termination on RF behaviour of GaN HEMT power devices , 2005, 2005 European Microwave Conference.

[7]  Dominique Schreurs,et al.  Mixer-like modeling with dynamic baseband characterization for supply-modulated PAs , 2014, 2014 9th European Microwave Integrated Circuit Conference.

[8]  D. Maksimovic,et al.  Codesign of PA, Supply, and Signal Processing for Linear Supply-Modulated RF Transmitters , 2012, IEEE Transactions on Microwave Theory and Techniques.

[9]  P. J. Tasker,et al.  The effect of baseband impedance termination on the linearity of GaN HEMTs , 2010, The 40th European Microwave Conference.

[10]  Z. Popović,et al.  GaN transistor large-signal characterization under multi-frequency excitation , 2015, 2015 IEEE MTT-S International Microwave Symposium.

[11]  P.J. Tasker,et al.  A study of the effect of envelope impedance on intermodulation asymmetry using a two-tone time domain measurement system , 2002, 2002 IEEE MTT-S International Microwave Symposium Digest (Cat. No.02CH37278).

[12]  Andrew H. Zai,et al.  X-band MMIC GaN power amplifiers designed for high-efficiency supply-modulated transmitters , 2013, 2013 IEEE MTT-S International Microwave Symposium Digest (MTT).