A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications
This paper presents a novel load modulation network to realize a broadband Doherty power amplifier (DPA). The proposed load modulation network consists of two generalized transmission lines and a modified coupler. A comprehensive theoretical analysis is carried out to explain the operation principle...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/5/2767 |
| _version_ | 1797614276645486592 |
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| author | Haipeng Zhu Zhiwei Zhang Chao Gu Xuefei Xuan |
| author_facet | Haipeng Zhu Zhiwei Zhang Chao Gu Xuefei Xuan |
| author_sort | Haipeng Zhu |
| collection | DOAJ |
| description | This paper presents a novel load modulation network to realize a broadband Doherty power amplifier (DPA). The proposed load modulation network consists of two generalized transmission lines and a modified coupler. A comprehensive theoretical analysis is carried out to explain the operation principles of the proposed DPA. The analysis of the normalized frequency bandwidth characteristic shows that a theoretical relative bandwidth of approximately 86% can be obtained across a normalized frequency range of 0.4–1.0. The complete design process that allows the design of the large-relative-bandwidth DPA based on derived parameter solutions is presented. A broadband DPA operating between 1.0 GHz and 2.5 GHz was fabricated for validation. Measurements demonstrate that the DPA can deliver an output power of 43.9–44.5 dBm with a drain efficiency of 63.7–71.6% in the 1.0–2.5 GHz frequency band at the saturation level. Moreover, a drain efficiency of 45.2–53.7% can be obtained at the 6 dB power back-off level. |
| first_indexed | 2024-03-11T07:10:15Z |
| format | Article |
| id | doaj.art-3ef58e2e16ff4e27a28abbb3377d47be |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T07:10:15Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-3ef58e2e16ff4e27a28abbb3377d47be2023-11-17T08:39:27ZengMDPI AGSensors1424-82202023-03-01235276710.3390/s23052767A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless CommunicationsHaipeng Zhu0Zhiwei Zhang1Chao Gu2Xuefei Xuan3School of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, ChinaSchool of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, ChinaECIT Institute, Queen’s University Belfast, Belfast BT3 9DT, UKSchool of Electronics and Information, Hangzhou Dianzi University, Hangzhou 310018, ChinaThis paper presents a novel load modulation network to realize a broadband Doherty power amplifier (DPA). The proposed load modulation network consists of two generalized transmission lines and a modified coupler. A comprehensive theoretical analysis is carried out to explain the operation principles of the proposed DPA. The analysis of the normalized frequency bandwidth characteristic shows that a theoretical relative bandwidth of approximately 86% can be obtained across a normalized frequency range of 0.4–1.0. The complete design process that allows the design of the large-relative-bandwidth DPA based on derived parameter solutions is presented. A broadband DPA operating between 1.0 GHz and 2.5 GHz was fabricated for validation. Measurements demonstrate that the DPA can deliver an output power of 43.9–44.5 dBm with a drain efficiency of 63.7–71.6% in the 1.0–2.5 GHz frequency band at the saturation level. Moreover, a drain efficiency of 45.2–53.7% can be obtained at the 6 dB power back-off level.https://www.mdpi.com/1424-8220/23/5/2767broadbandDoherty power amplifierload modulation networkrelative bandwidth |
| spellingShingle | Haipeng Zhu Zhiwei Zhang Chao Gu Xuefei Xuan A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications Sensors broadband Doherty power amplifier load modulation network relative bandwidth |
| title | A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications |
| title_full | A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications |
| title_fullStr | A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications |
| title_full_unstemmed | A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications |
| title_short | A High-Relative-Bandwidth Doherty Power Amplifier with Modified Load Modulation Network for Wireless Communications |
| title_sort | high relative bandwidth doherty power amplifier with modified load modulation network for wireless communications |
| topic | broadband Doherty power amplifier load modulation network relative bandwidth |
| url | https://www.mdpi.com/1424-8220/23/5/2767 |
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