Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers
We present a theoretical and experimental analysis of the use of a reversed uneven power splitting (RUPS) technique for asymmetric Doherty power amplifiers (PAs). The RUPS technique utilizes an uneven power splitter that drives more input power into the carrier amplifier, enabling shallow class-C op...
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| Format: | Article |
| Language: | English |
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IEEE
2023-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/10311557/ |
| _version_ | 1797627783448363008 |
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| author | Cheol Ho Kim Hyeon-June Kim |
| author_facet | Cheol Ho Kim Hyeon-June Kim |
| author_sort | Cheol Ho Kim |
| collection | DOAJ |
| description | We present a theoretical and experimental analysis of the use of a reversed uneven power splitting (RUPS) technique for asymmetric Doherty power amplifiers (PAs). The RUPS technique utilizes an uneven power splitter that drives more input power into the carrier amplifier, enabling shallow class-C operation of the peaking amplifier. Although the RUPS technique has played a significant role in achieving high-performance Doherty PAs, there has been a lack of comprehensive research examining the fundamental factors that contribute to its effectiveness. We conducted numerical and experimental investigations to demonstrate that the RUPS Doherty PA exhibits significant improvements in efficiency, gain, and linearity compared to conventional Doherty PAs with even power splitting (EPS). For the experiments, the EPS and RUPS networks were developed using lumped-element directional couplers. The fabricated RUPS Doherty PA, based on a 0.25- <inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math></inline-formula> m GaN HEMT monolithic microwave integrated circuit (MMIC) process, achieves superior overall performance at 2.14 GHz compared to the conventional EPS Doherty PA, without requiring any additional circuitry. The results verify that the RUPS technique can enhance the performance of asymmetric Doherty PAs. |
| first_indexed | 2024-03-11T10:30:20Z |
| format | Article |
| id | doaj.art-14a05644af9749e5a1384d40f5ff6633 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-03-11T10:30:20Z |
| publishDate | 2023-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-14a05644af9749e5a1384d40f5ff66332023-11-15T00:01:10ZengIEEEIEEE Access2169-35362023-01-011112609812610910.1109/ACCESS.2023.333094710311557Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power AmplifiersCheol Ho Kim0https://orcid.org/0000-0002-2212-1677Hyeon-June Kim1https://orcid.org/0000-0002-0516-5811Superintelligence Creative Research Laboratory, Electronics and Telecommunications Research Institute, Daejeon, South KoreaDepartment of Semiconductor Engineering, Seoul National University of Science and Technology, Seoul, South KoreaWe present a theoretical and experimental analysis of the use of a reversed uneven power splitting (RUPS) technique for asymmetric Doherty power amplifiers (PAs). The RUPS technique utilizes an uneven power splitter that drives more input power into the carrier amplifier, enabling shallow class-C operation of the peaking amplifier. Although the RUPS technique has played a significant role in achieving high-performance Doherty PAs, there has been a lack of comprehensive research examining the fundamental factors that contribute to its effectiveness. We conducted numerical and experimental investigations to demonstrate that the RUPS Doherty PA exhibits significant improvements in efficiency, gain, and linearity compared to conventional Doherty PAs with even power splitting (EPS). For the experiments, the EPS and RUPS networks were developed using lumped-element directional couplers. The fabricated RUPS Doherty PA, based on a 0.25- <inline-formula> <tex-math notation="LaTeX">$\mu$ </tex-math></inline-formula> m GaN HEMT monolithic microwave integrated circuit (MMIC) process, achieves superior overall performance at 2.14 GHz compared to the conventional EPS Doherty PA, without requiring any additional circuitry. The results verify that the RUPS technique can enhance the performance of asymmetric Doherty PAs.https://ieeexplore.ieee.org/document/10311557/Doherty power amplifier (Doherty PA)input power splittingdirectional couplergallium nitride (GaN)monolithic microwave integrated circuit (MMIC)long-term evolution (LTE) |
| spellingShingle | Cheol Ho Kim Hyeon-June Kim Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers IEEE Access Doherty power amplifier (Doherty PA) input power splitting directional coupler gallium nitride (GaN) monolithic microwave integrated circuit (MMIC) long-term evolution (LTE) |
| title | Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers |
| title_full | Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers |
| title_fullStr | Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers |
| title_full_unstemmed | Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers |
| title_short | Theoretical and Experimental Analysis of Reversed Uneven Power Splitting Technique in GaN MMIC Doherty Power Amplifiers |
| title_sort | theoretical and experimental analysis of reversed uneven power splitting technique in gan mmic doherty power amplifiers |
| topic | Doherty power amplifier (Doherty PA) input power splitting directional coupler gallium nitride (GaN) monolithic microwave integrated circuit (MMIC) long-term evolution (LTE) |
| url | https://ieeexplore.ieee.org/document/10311557/ |
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