A Watt-Level Multimode Multi-Efficiency-Peak Digital Polar Power Amplifier with Linear Single-Supply ClassG Technique

📋 论文概要

该论文提出了一种采用线性单电源Class G技术的数字极性功率放大器，通过多模式和多效率峰值设计，解决了高PAPR信号下功率回退时效率严重下降的问题，实现了瓦特级输出功率和良好的回退效率。

💡 主要创新点

• 创新点1：提出线性单电源Class G技术，无需负电压电源即可实现效率增强，简化了系统设计。
• 创新点2：采用多模式多效率峰值架构，在不同输出功率水平下自动切换效率峰值，显著提升高PAPR信号的平均效率。

🏷 关键词

📄 原文摘要

Signals for next-generation communication systems typically have high peak-toaverage power ratios (PAPR) (e.g., 10 to 13dB), forcing operation at deep output power backoff (PBO). A good efficiency at PBO is required to maintain high average efficiency. Typical power amplifiers (PAs) demonstrate degraded efficiency at high PBO levels, which causes a significant degradation in efficiency, particularly for signals with high PAPR. Efficiency-enhancement techniques using digital PAs (DPAs) have been extensively introduced (e.g., Class-G, Doherty, etc.). DPAs have been shown to be great choices for efficiency enhancement at PBO, because each DPA cell can change the operating mode while switched OFF during the mode transitions, resulting in better linearity and seamless efficiency enhancement at PBO. In recent years, the Class-G technique was used to add an efficiency peak at 6dB PBO [1,2]. Combining Class-G and Doherty resulted in two or three additional

👥 作者与机构

Si-Wook Yoo, Shih-Chang Hung, Sang-Min Yoo

Michigan State University, East Lansing, MI