谐波注入 Doherty 功率放大器：优势与局限

2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR) Pub Date : 2024-01-21 DOI:10.1109/PAWR59907.2024.10438621

Moise Safari Mugisho, C. Friesicke, M. Ayad, T. Maier, Rüdiger Quay

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引用次数: 0

摘要

本文研究了二次谐波（2f_{0}$）功率注入对道赫蒂功率放大器（DPA）性能的影响。这项研究是通过在 100 纳米氮化镓（GaN）技术上制造的单级 24 GHz 谐波注入 DPA（HI-DPA）来实现的。工作频率为 48 GHz 的片上注入功率放大器 (IPA) 用于产生注入的 2f_{0}$ 功率。晶片上连续波测量结果表明，在 24 GHz 频率下，HI-DPA 在 32.5dBm 的峰值输出功率 (POP) 和 6 dB 的输出功率关断 (OPBO) 条件下，功率附加效率 (PAE) 分别达到 37% 和 32.5%。与在类似工作条件下设计和制造的传统 DPA（CDPA）相比，HI-DPA 的 AM/PM 特性有所改善，在峰值输出功率（POP）和 OPBO 条件下的 PAE 分别提高了 3.3% 和 6%，但小信号增益损失为 1 dB。

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Harmonic-Injection Doherty Power Amplifier: Benefits and Limitations

This paper presents an investigation into the effects of second harmonic ($2f_{0}$) power injection on the performance of a Doherty power amplifier (DPA). This investigation is conducted through the implementation of a single-stage 24 GHz harmonic-injection DPA (HI-DPA) manufactured on a 100 nm Gallium Nitride (GaN) technology. An on-chip injection power amplifier (IPA) operating at 48 GHz is used to generate the injected $2f_{0}$ power. On-wafer continuous wave measurements demonstrate that at 24 GHz, the HI-DPA achieves a power added efficiency (PAE) of 37% and 32.5% at a peak output power (POP) of 32.5dBm and 6 dB output power back-off (OPBO), respectively. When compared to a conventional DPA (CDPA) designed and manufactured under similar operating conditions, the HI-DPA exhibits an improved AM/PM characteristics with a 3.3% and 6% higher PAE at POP and OPBO at a cost of 1 dB small-signal gain penalty.

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2024 IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)

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