Experimental Validation of a Four-Way Outphasing Combiner for Microwave Power Amplification
Author(s)Barton, Taylor W.; Dawson, Joel L.; Perreault, David J.
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This letter presents a 2.14 GHz, four-way power combining and outphasing system for high-power amplifiers such as those in radio basestations (RBS). The combiner is ideally lossless, and enables power control through load modulation of the power amplifiers (PAs). A discrete-component power combiner is designed and characterized, and combined with inverse Class-F PAs using GaN HEMT devices to develop a complete PA system. We demonstrate the effectiveness of the system over a range of outphasing control angles. This first-ever microwave implementation of the outphasing system has a peak CW drain efficiency of 68.9%, with efficiency greater than 55% over a 5.5 dB power range. It provides an average modulated efficiency of 57% for a W-CDMA signal with 3.47 dB peak to average power ratio (PAPR) at 42 dBm output power.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Microsystems Technology Laboratories
IEEE Microwave and Wireless Components Letters
Institute of Electrical and Electronics Engineers (IEEE)
Barton, Taylor W., Joel L. Dawson, and David J. Perreault. “Experimental Validation of a Four-Way Outphasing Combiner for Microwave Power Amplification.” IEEE Microw. Wireless Compon. Lett. 23, no. 1 (n.d.): 28–30.
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