A High-Efficiency Symmetrical Doherty Power Amplifier With Back-Off Reconfigurability
This letter presents the design of a symmetrical Doherty power amplifier (DPA) with output power back-off (OBO) range reconfigurability by using a new and explicit circuit model. The theoretical analysis reveals that OBO range (>9 dB) can be extended and controlled without changing the circuit structure, taking advantage of the phase shift of DPA matching subnetworks and adjusting the drain bias. To verify the proposed theory, a DPA is designed across 2–2.4 GHz with a 9-dB OBO range. Also, 11 dB can be further implemented by drain bias adjusting. The experimental results show drain efficiencies of 47%–52% at 9-dB OBO levels and 45%–49% at 11-dB OBO levels across 2–2.4 GHz, respectively.
Authors
- Haiqian Tang (ORCID: https://orcid.org/0009-0002-1986-1620)
- Lipeng Wan (ORCID: https://orcid.org/0000-0003-2133-1805)
- Cheng Zhong (ORCID: https://orcid.org/0000-0002-9724-4807)
- Fei You (ORCID: https://orcid.org/0000-0001-7708-4618)
- Tianyang Zhong (ORCID: https://orcid.org/0009-0002-4124-1129)
- Songbai He (ORCID: https://orcid.org/0000-0002-1770-7569)
- Chuan Li (ORCID: https://orcid.org/0000-0003-4507-4487)
- Yuchen Bian (ORCID: https://orcid.org/0009-0007-9023-8870)
- Mingyu Liu (ORCID: https://orcid.org/0000-0001-9905-4399)
Institutions
- University of Electronic Science and Technology of China (CN)
Publication Details
- Journal
- IEEE Microwave and Wireless Technology Letters
- Published
- 2024-12-26
- DOI
- https://doi.org/10.1109/lmwt.2024.3517706
- Citations
- 4
- Primary Topic
- Advanced Power Amplifier Design
- Type
- article
- Field-Weighted Citation Impact
- 0.83
Funders
- National Natural Science Foundation of China