A 62-to-68GHz Linear 6Gb/s 64QAM CMOS Doherty Radiator with 27.5%/20.1% PAE at Peak/6dB-Back-off Output Power Leveraging High-Efficiency Multi-Feed Antenna-Based Active Load Modulation

📋 论文概要

该论文提出了一种62-68GHz频段的线性6Gb/s 64QAM CMOS Doherty辐射器，通过Doherty架构提升了毫米波功率放大器在功率回退时的效率，解决了高PAPR信号传输时能量效率低的问题。实测峰值PAE为27.5%，6dB回退PAE为20.1%。

💡 主要创新点

• 首次在62-68GHz毫米波频段实现高性能Doherty PA，支持6Gb/s 64QAM线性调制。
• 通过优化Doherty架构和电路设计，同时实现了高峰值效率和优良的功率回退效率。

🏷 关键词

📄 原文摘要

Extreme throughput requirements on future mm-wave systems, e.g., 5G links, necessitates the use of spectrum-efficient modulations that often come with high peak-to-average power ratios (PAPRs). Therefore, there is an increasing need for mm-wave power amplifiers (PAs) with high power back-off (PBO) efficiency, so that wideband large-PAPR signals can be transmitted with high energy efficiency. Among various PA PBO efficiency-enhancement techniques, Doherty PAs feature wideband modulations and low baseband DSP overhead, making them particularly promising candidates for high-speed mm-wave systems. William H. Doherty, back in 1936, proposed two generic PA architectures employing either parallel or series combiners to realize active load modulations for PA PBO efficiency enhancement [1]. Different from parallel Doherty combiner that intrinsically scales up the load impedance, series Doherty combiner naturally

👥 作者与机构

Huy Thong Nguyen, Taiyun Chi, Sensen Li, Hua Wang

Georgia Institute of Technology, Atlanta, GA