Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner
A lossless power-combining network comprising cascaded transmission-line segments in a tree structure is introduced for a multi-way outphasing architecture. This architecture addresses the suboptimal loading conditions in Chireix outphasing transmitters while offering a compact and microwave-friendl...
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| Format: | Article |
| Language: | en_US |
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Institute of Electrical and Electronics Engineers (IEEE)
2017
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| Online Access: | http://hdl.handle.net/1721.1/111023 https://orcid.org/0000-0003-3295-7440 https://orcid.org/0000-0002-0746-6191 |
| _version_ | 1826210874731266048 |
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| author | Barton, Taylor W. Pednekar, Prathamesh H. Jurkov, Alexander 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. Pednekar, Prathamesh H. Jurkov, Alexander Perreault, David J |
| author_sort | Barton, Taylor W. |
| collection | MIT |
| description | A lossless power-combining network comprising cascaded transmission-line segments in a tree structure is introduced for a multi-way outphasing architecture. This architecture addresses the suboptimal loading conditions in Chireix outphasing transmitters while offering a compact and microwave-friendly implementation compared to previous techniques. In the proposed system, four saturated power amplifiers (PAs) interact through an all-TL power-combining network to produce nearly ideal resistive load modulation of the branch PAs over a 10:1 range of output powers. This work focuses on the operation of the combining network, deriving analytical expressions for input-port admittance characteristics and an outphasing control strategy to modulate output power while minimizing reactive loading of the saturated branch amplifiers. A methodology for combiner design is given, along with a combiner design example for compact layout. An experimental four-way outphasing amplifier system operating at 2.14 GHz demonstrates the technique with greater than 60% drain efficiency for an output power range of 6.2 dB. The system demonstrates a W-CDMA modulated signal with a 9.15-dB peak-to-average power ratio with 54.5% average modulated efficiency at 41.1-dBm average output power. |
| first_indexed | 2024-09-23T14:56:50Z |
| format | Article |
| id | mit-1721.1/111023 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:56:50Z |
| publishDate | 2017 |
| publisher | Institute of Electrical and Electronics Engineers (IEEE) |
| record_format | dspace |
| spelling | mit-1721.1/1110232022-10-01T23:32:23Z Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner Barton, Taylor W. Pednekar, Prathamesh H. Jurkov, Alexander Perreault, David J Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science Jurkov, Alexander Perreault, David J A lossless power-combining network comprising cascaded transmission-line segments in a tree structure is introduced for a multi-way outphasing architecture. This architecture addresses the suboptimal loading conditions in Chireix outphasing transmitters while offering a compact and microwave-friendly implementation compared to previous techniques. In the proposed system, four saturated power amplifiers (PAs) interact through an all-TL power-combining network to produce nearly ideal resistive load modulation of the branch PAs over a 10:1 range of output powers. This work focuses on the operation of the combining network, deriving analytical expressions for input-port admittance characteristics and an outphasing control strategy to modulate output power while minimizing reactive loading of the saturated branch amplifiers. A methodology for combiner design is given, along with a combiner design example for compact layout. An experimental four-way outphasing amplifier system operating at 2.14 GHz demonstrates the technique with greater than 60% drain efficiency for an output power range of 6.2 dB. The system demonstrates a W-CDMA modulated signal with a 9.15-dB peak-to-average power ratio with 54.5% average modulated efficiency at 41.1-dBm average output power. 2017-08-28T17:25:43Z 2017-08-28T17:25:43Z 2016-03 Article http://purl.org/eprint/type/JournalArticle 0018-9480 1557-9670 http://hdl.handle.net/1721.1/111023 Barton, Taylor W. et al. “Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner.” IEEE Transactions on Microwave Theory and Techniques 64, 4 (April 2016): 1313–1326 © 2016 Institute of Electrical and Electronics Engineers (IEEE) https://orcid.org/0000-0003-3295-7440 https://orcid.org/0000-0002-0746-6191 en_US http://dx.doi.org/10.1109/TMTT.2016.2531691 IEEE Transactions on Microwave Theory and Techniques 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. Pednekar, Prathamesh H. Jurkov, Alexander Perreault, David J Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title | Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title_full | Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title_fullStr | Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title_full_unstemmed | Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title_short | Multi-Way Lossless Outphasing System Based on an All-Transmission-Line Combiner |
| title_sort | multi way lossless outphasing system based on an all transmission line combiner |
| url | http://hdl.handle.net/1721.1/111023 https://orcid.org/0000-0003-3295-7440 https://orcid.org/0000-0002-0746-6191 |
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