Design of Ultra-Wideband Doherty Power Amplifier Using a Modified Combiner Integrated with Complex Combining Impedance.
SENSORS (BASEL, SWITZERLAND) 2023;
23:3882. [PMID:
37112223 PMCID:
PMC10142567 DOI:
10.3390/s23083882]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 03/30/2023] [Accepted: 04/08/2023] [Indexed: 06/19/2023]
Abstract
To be compatible with future wireless communication systems, it is very necessary to extend the bandwidth of the Doherty power amplifier (DPA). In this paper, a modified combiner integrated with a complex combining impedance is adopted to enable an ultra-wideband DPA. Meanwhile, a comprehensive analysis is performed on the proposed method. It is illustrated that the proposed design methodology can provide power amplifier (PA) designers with more freedom in implementing ultra-wideband DPAs. As a concept of proof, a DPA working over 1.2-2.8 GHz (a relative bandwidth of 80%) is designed, fabricated and measured in this work. Experimental results showed that the fabricated DPA delivers a saturation output power of 43.2-44.7 dBm with a gain of 5.2-8.6 dB. Meantime, the fabricated DPA achieves a saturation drain efficiency (DE) of 44.3-70.4% and a 6 dB back-off DE of 38.7-57.6%.
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