Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers
A lossless multi-way outphasing and power combining system for microwave power amplification is presented. The architecture addresses one of the primary drawbacks of Chireix outphasing; namely, the sub-optimal loading conditions for the branch power amplifiers. In the proposed system, four saturated...
| Main Authors: | , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Institute of Electrical and Electronics Engineers (IEEE)
2016
|
| Online Access: | http://hdl.handle.net/1721.1/100989 https://orcid.org/0000-0002-0746-6191 |
| _version_ | 1811069444728815616 |
|---|---|
| author | Barton, Taylor W. Perreault, David J. |
| author2 | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science |
| author_facet | Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Barton, Taylor W. Perreault, David J. |
| author_sort | Barton, Taylor W. |
| collection | MIT |
| description | A lossless multi-way outphasing and power combining system for microwave power amplification is presented. The architecture addresses one of the primary drawbacks of Chireix outphasing; namely, the sub-optimal loading conditions for the branch power amplifiers. In the proposed system, four saturated power amplifiers interact through a lossless power combining network to produce nearly resistive load modulation over a 10:1 range of output powers. This work focuses on two microstrip-based power combiner implementations: a hybrid microstrip/discrete implementation using a combination of microstrip transmission line sections with discrete shunt elements, and an all-microstrip implementation incorporating open-circuited radial stubs. We demonstrate and compare these techniques in a 2.14 GHz power amplifier system. With the all-microstrip implementation, the system demonstrates a peak CW drain efficiency of 70% and drain efficiency of over 60% over a 6.5-dB outphasing output power range with a peak power of over 100 W. We demonstrate W-CDMA modulation with 55.6% average modulated efficiency at 14.1 W average output power for a 9.15-dB peak to average power ratio (PAPR) signal. The performance of this all-microstrip system is compared to that of the proposed hybrid microstrip/discrete version and a previously reported implementation in discrete lumped-element form. |
| first_indexed | 2024-09-23T08:10:36Z |
| format | Article |
| id | mit-1721.1/100989 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:10:36Z |
| publishDate | 2016 |
| publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| record_format | dspace |
| spelling | mit-1721.1/1009892022-09-30T08:06:27Z Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers Barton, Taylor W. Perreault, David J. Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Barton, Taylor W. Perreault, David J. A lossless multi-way outphasing and power combining system for microwave power amplification is presented. The architecture addresses one of the primary drawbacks of Chireix outphasing; namely, the sub-optimal loading conditions for the branch power amplifiers. In the proposed system, four saturated power amplifiers interact through a lossless power combining network to produce nearly resistive load modulation over a 10:1 range of output powers. This work focuses on two microstrip-based power combiner implementations: a hybrid microstrip/discrete implementation using a combination of microstrip transmission line sections with discrete shunt elements, and an all-microstrip implementation incorporating open-circuited radial stubs. We demonstrate and compare these techniques in a 2.14 GHz power amplifier system. With the all-microstrip implementation, the system demonstrates a peak CW drain efficiency of 70% and drain efficiency of over 60% over a 6.5-dB outphasing output power range with a peak power of over 100 W. We demonstrate W-CDMA modulation with 55.6% average modulated efficiency at 14.1 W average output power for a 9.15-dB peak to average power ratio (PAPR) signal. The performance of this all-microstrip system is compared to that of the proposed hybrid microstrip/discrete version and a previously reported implementation in discrete lumped-element form. Massachusetts Institute of Technology. Center for Integrated Circuits and Systems Massachusetts Institute of Technology. Microsystems Technology Laboratories. GaN Energy Initiative 2016-01-26T01:26:41Z 2016-01-26T01:26:41Z 2014-09 2014-02 Article http://purl.org/eprint/type/JournalArticle 1549-8328 1558-0806 http://hdl.handle.net/1721.1/100989 Barton, Taylor W., and David J. Perreault. “Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers.” IEEE Transactions on Circuits and Systems I: Regular Papers 61, no. 10 (October 2014): 2987–2998. https://orcid.org/0000-0002-0746-6191 en_US http://dx.doi.org/10.1109/tcsi.2014.2321203 IEEE Transactions on Circuits and Systems I: Regular Papers Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Institute of Electrical and Electronics Engineers (IEEE) MIT web domain |
| spellingShingle | Barton, Taylor W. Perreault, David J. Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title | Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title_full | Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title_fullStr | Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title_full_unstemmed | Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title_short | Four-Way Microstrip-Based Power Combining for Microwave Outphasing Power Amplifiers |
| title_sort | four way microstrip based power combining for microwave outphasing power amplifiers |
| url | http://hdl.handle.net/1721.1/100989 https://orcid.org/0000-0002-0746-6191 |
| work_keys_str_mv | AT bartontaylorw fourwaymicrostripbasedpowercombiningformicrowaveoutphasingpoweramplifiers AT perreaultdavidj fourwaymicrostripbasedpowercombiningformicrowaveoutphasingpoweramplifiers |