Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application
Similar to a Doherty power amplifier (DPA), a sequential power amplifier (SPA) is mainly composed of a main amplifier, an auxiliary amplifier and a combiner. However, SPA breaks the bandwidth limitation of the impedance inverter in the DPA, and also simplifies the design procedure. Since the main am...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-12-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/17/1/161 |
| _version_ | 1826894385980112896 |
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| author | Keyuan Yang Rongxing Yang Pan Zhang Wei Shi Chunyu Hu Weimin Shi |
| author_facet | Keyuan Yang Rongxing Yang Pan Zhang Wei Shi Chunyu Hu Weimin Shi |
| author_sort | Keyuan Yang |
| collection | DOAJ |
| description | Similar to a Doherty power amplifier (DPA), a sequential power amplifier (SPA) is mainly composed of a main amplifier, an auxiliary amplifier and a combiner. However, SPA breaks the bandwidth limitation of the impedance inverter in the DPA, and also simplifies the design procedure. Since the main amplifier has no load modulation, it is easy for the SPA to realize broadband operation and improve the output back-off (OBO) power range. Therefore, SPA has great advantages and potential in expanding bandwidth, improving drain efficiency and expanding the back-off range of a power amplifier simultaneously. This paper describes the evolution and classification of the SPA. First, the basic theory of the SPA is reviewed. Then, some two-way SPAs using coupler and circulator as a power combiner are discussed. Thirdly, the latest popular sequential load modulated balanced amplifier is overviewed. |
| first_indexed | 2024-03-08T15:08:05Z |
| format | Article |
| id | doaj.art-0ec7acabc82640e09c78e1c6b9e47770 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2025-02-17T05:13:28Z |
| publishDate | 2023-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-0ec7acabc82640e09c78e1c6b9e477702025-01-09T04:10:30ZengMDPI AGEnergies1996-10732023-12-0117116110.3390/en17010161Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband ApplicationKeyuan Yang0Rongxing Yang1Pan Zhang2Wei Shi3Chunyu Hu4Weimin Shi5Xi’an Branch of China Academy of Space Technology, Xi’an 710100, ChinaSchool of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, ChinaXi’an Branch of China Academy of Space Technology, Xi’an 710100, ChinaXi’an Branch of China Academy of Space Technology, Xi’an 710100, ChinaSchool of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, ChinaSchool of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, ChinaSimilar to a Doherty power amplifier (DPA), a sequential power amplifier (SPA) is mainly composed of a main amplifier, an auxiliary amplifier and a combiner. However, SPA breaks the bandwidth limitation of the impedance inverter in the DPA, and also simplifies the design procedure. Since the main amplifier has no load modulation, it is easy for the SPA to realize broadband operation and improve the output back-off (OBO) power range. Therefore, SPA has great advantages and potential in expanding bandwidth, improving drain efficiency and expanding the back-off range of a power amplifier simultaneously. This paper describes the evolution and classification of the SPA. First, the basic theory of the SPA is reviewed. Then, some two-way SPAs using coupler and circulator as a power combiner are discussed. Thirdly, the latest popular sequential load modulated balanced amplifier is overviewed.https://www.mdpi.com/1996-1073/17/1/161sequential power amplifierload modulationoutput back-offhigh efficiency |
| spellingShingle | Keyuan Yang Rongxing Yang Pan Zhang Wei Shi Chunyu Hu Weimin Shi Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application Energies sequential power amplifier load modulation output back-off high efficiency |
| title | Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application |
| title_full | Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application |
| title_fullStr | Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application |
| title_full_unstemmed | Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application |
| title_short | Development Review of Highly Efficient Sequential Power Amplifier with Extended Back-Off Range for Broadband Application |
| title_sort | development review of highly efficient sequential power amplifier with extended back off range for broadband application |
| topic | sequential power amplifier load modulation output back-off high efficiency |
| url | https://www.mdpi.com/1996-1073/17/1/161 |
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