Four-way lossless outphasing and power combining with hybrid microstrip/discrete combiner for microwave power amplification
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Perreault_Four-Way.pdf
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Author(s)
Barton, Taylor W.
Dawson, Joel L.
Perreault, David J.
Date Issued
June 2013
Journal
Proceedings of the 2013 IEEE MTT-S International Microwave Symposium Digest (MTT)
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Citation
Barton, Taylor W., Joel L. Dawson, and David J. Perreault. “Four-Way Lossless Outphasing and Power Combining with Hybrid Microstrip/discrete Combiner for Microwave Power Amplification.” 2013 IEEE MTT-S International Microwave Symposium Digest (MTT) (June 2013).
Version
Author's final manuscript
Abstract
This work demonstrates a four-way outphasing and power combining system for microwave power amplification using a novel power combining network. The ideally lossles combining network is implemented using a combination of microstrip transmission-line sections with discrete shunt elements. We present the derivation of the power combining network topology as well as practical implementation details. The new power combining network is demonstrated in a 50-W, 2.14-GHz power amplifier system using load modulation of switching GaN PAs through outphasing for output power control. The system has a peak CW drain efficiency of 59.5% and drain efficiency above 45% over a 8.17-dB outphasing output power range. In modulated tests with a signal bandwidth of 3.84 MHz, the system demonstrates 52% average drain efficiency for a 3.9-dB peak to average power ratio (PAPR) signal, and 38% drain efficiency for a W-CDMA signal with 9.6 PAPR.
MIT Department
Massachusetts Institute of Technology. Microsystems Technology Laboratories
Massachusetts Institute of Technology. School of Engineering
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Creative Commons Attribution-Noncommercial-Share Alike
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DOI of Published Version
https://doi.org/10.1109/MWSYM.2013.6697624
