Broadband equal-cell Doherty power amplifier with extended back-off range based on asymmetrical voltage and nonlinear current profiles

IF 3 3区计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Aeu-International Journal of Electronics and Communications Pub Date : 2024-09-05 DOI:10.1016/j.aeue.2024.155511

Yu Li , Weimin Shi , Ke Liu , Decheng Gan , Zhijiang Dai , Jingzhou Pang , Mingyu Li

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引用次数: 0

Abstract

This paper proposes a generalized design methodology for extending the bandwidth and output back-off range of an equal-cell Doherty power amplifier (EC-DPA). The parameters of the EC-DPA combiner are derived based on pre-defined asymmetrical voltage and nonlinear current profiles. It is illustrated that the design parameters of the EC-DPA can be expressed as a function of the combining load. Then, the combining load can be optimized to extend the bandwidth of the proposed EC-DPA. As a validation, an 1.4–2.1 GHz EC-DPA with extended output back-off range is implemented in this paper. Under a continuous-wave (CW) signal excitation, the fabricated EC-DPA achieves a maximum output power of 42.6–43.8 dBm, a saturation drain efficiency (DE) of 50.2%–70.2% and a 10 dB back-off DE of 45.2%–53.7% over 1.4–2.1 GHz. Moreover, under the excitation of a 20 MHz modulated signal with a peak-to-average power ratio (PAPR) of 8.0 dB, the measured adjacent channel leakage ratios (ACLRs) of the fabricated EC-DPA changes from −36.2 dBc to −25.5 dBc at the lower band and from −34.6 to −23.8 dBc at the upper band over 1.4–2.1 GHz when the average output power is 35.0 dBm.

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基于非对称电压和非线性电流曲线的宽带等容 Doherty 功率放大器，具有更宽的关断范围

本文提出了一种通用设计方法，用于扩展等效单元 Doherty 功率放大器（EC-DPA）的带宽和输出背离范围。EC-DPA 组合器的参数是根据预定义的非对称电压和非线性电流曲线推导出来的。说明 EC-DPA 的设计参数可表示为组合负载的函数。然后，可以通过优化组合负载来扩展拟议 EC-DPA 的带宽。作为验证，本文实现了一个具有扩展输出偏移范围的 1.4-2.1 GHz EC-DPA。在连续波（CW）信号激励下，所制造的 EC-DPA 在 1.4-2.1 GHz 频率范围内实现了 42.6-43.8 dBm 的最大输出功率、50.2%-70.2% 的饱和漏极效率（DE）和 45.2%-53.7% 的 10 dB 回退 DE。此外，在峰均功率比（PAPR）为 8.0 dB 的 20 MHz 调制信号激励下，当平均输出功率为 35.0 dBm 时，在 1.4-2.1 GHz 频段内，所制造的 EC-DPA 的测量邻道泄漏比（ACLR）从低频段的 -36.2 dBc 变为 -25.5 dBc，而在高频段则从 -34.6 dBc 变为 -23.8 dBc。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Aeu-International Journal of Electronics and Communications 工程技术-电信学

CiteScore

6.90

自引率

18.80%

发文量

292

审稿时长

4.9 months

期刊介绍： AEÜ is an international scientific journal which publishes both original works and invited tutorials. The journal''s scope covers all aspects of theory and design of circuits, systems and devices for electronics, signal processing, and communication, including: signal and system theory, digital signal processing network theory and circuit design information theory, communication theory and techniques, modulation, source and channel coding switching theory and techniques, communication protocols optical communications microwave theory and techniques, radar, sonar antennas, wave propagation AEÜ publishes full papers and letters with very short turn around time but a high standard review process. Review cycles are typically finished within twelve weeks by application of modern electronic communication facilities.