A 3.2–3.6 GHz GaN Doherty Power Amplifier Module Based on a Compact Low-Loss Combiner
In this paper, a 3.2-3.6 GHz two-stage Doherty power amplifier (PA) module is proposed for fifth-generation (5G) massive multiple-input multiple-output (MIMO) base stations. A detailed design method and procedure for a compact and low-loss combiner suitable for the Doherty PA module are introduced. Based on the proposed combiner, a Doherty PA module is implemented using gallium nitride (GaN) transistors and surface-mounted devices (SMDs) with a packaged size of 8 × 8 mm<sup>2</sup>. The proposed two-stage Doherty PA module achieves a 3 dB small-signal bandwidth of 3.1-3.9 GHz and a peak gain of 31.7 dB. From 3.2 to 3.6 GHz, the saturated output power is 40.4-41.1 dBm. Moreover, the measured saturated drain efficiency (DE) and 8 dB power back-off (PBO) DE reach 51-56.6% and 45.5-48.6%, respectively.
Authors
- Xiaolin Lv
- Kai Cui (ORCID: https://orcid.org/0000-0003-0450-775X)
- Kai Kang (ORCID: https://orcid.org/0000-0002-8878-2080)
- Dehan Wang (ORCID: https://orcid.org/0000-0002-6270-3575)
- Xiyu Wang (ORCID: https://orcid.org/0000-0003-4020-8140)
- Haijun Liu (ORCID: https://orcid.org/0000-0001-5671-1598)
- Wenming Li (ORCID: https://orcid.org/0000-0002-8396-9110)
Institutions
- University of Electronic Science and Technology of China (CN)
- China Mobile (China) (CN)
- ZTE (China) (CN)
- State Key Laboratory of Mobile Networks and Mobile Multimedia Technology
Publication Details
- Journal
- Micromachines
- Published
- 2025-02-15
- DOI
- https://doi.org/10.3390/mi16020220
- Primary Topic
- Advanced Power Amplifier Design
- Type
- article
- Field-Weighted Citation Impact
- 0.00