A 28GHz Current-Mode Inverse-Outphasing Transmitter Achieving 40%/31% PA Efficiency at Psat/6dB PBO and Supporting 15Gbit/s 64-QAM for 5G Communication

📋 论文概要

该论文提出了一种28GHz的电流模逆包络发射机，利用逆包络架构有效提升了毫米波功率放大器在功率回退时的效率。实验结果显示在饱和功率和6dB回退下分别达到40%和31%的PA效率，并支持15Gbps的数据传输速率，解决了5G及未来通信中高PAPR信号对线性度与效率的严苛要求。

💡 主要创新点

• 首次提出电流模逆包络（Current-Mode Inverse-Outphasing）架构，通过电流域合成实现高效功率回退。
• 在28GHz毫米波频段，同时实现了饱和功率和6dB回退下的高效率（40%/31%），为高PAPR调制提供了可行方案。
• 采用优化设计的有源/无源合成网络，在保持线性度的同时大幅提升了回退效率。

🏷 关键词

📄 原文摘要

As mm-wave offers broader spectra and proportionate capacity increase, it will be extensively employed in 5G-and-beyond communication systems to address the exponentially growing data-rate demand. Viable mm-wave TX or PA solutions should handle multi-Gbit/s complex modulations with large PAPR, pushing the already stringent linearity-efficiency requirement on deployed TXs/PAs. This demand has stimulated extensive research on new TX/PA architectures to further advance the performance envelope at mm-wave. Outphasing is a popular TX/PA topology to achieve large power-back-off (PBO) efficiency enhancement together with high peak efficiency. A typical outphasing architecture consists of two TX/PA branches that operate with their saturated voltage swings but dynamically varying phase difference to realize active load modulation at PBO [1]. However, two major challenges greatly limit the implementation and performance of conventional voltage-mode outphasing at

👥 作者与机构

Sensen Li, Min-Yu Huang, Doohwan Jung, Tzu-Yuan Huang, Hua Wang

Georgia Institute of Technology, Atlanta, GA