A Hybrid Integrated and Low-Cost Multi-Chip Broadband Doherty Power Amplifier Module for 5G Massive MIMO Application

IF 10.1 1区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Engineering Pub Date : 2024-07-01 DOI:10.1016/j.eng.2024.01.017

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引用次数: 0

Abstract

In this paper, a hybrid integrated broadband Doherty power amplifier (DPA) based on a multi-chip module (MCM), whose active devices are fabricated using the gallium nitride (GaN) process and whose passive circuits are fabricated using the gallium arsenide (GaAs) integrated passive device (IPD) process, is proposed for 5G massive multiple-input multiple-output (MIMO) application. An inverted DPA structure with a low-Q output network is proposed to achieve better bandwidth performance, and a single-driver architecture is adopted for a chip with high gain and small area. The proposed DPA has a bandwidth of 4.4–5.0 GHz that can achieve a saturation of more than 45.0 dBm. The gain compression from 37 dBm to saturation power is less than 4 dB, and the average power-added efficiency (PAE) is 36.3% with an 8.5 dB peak-to-average power ratio (PAPR) in 4.5–5.0 GHz. The measured adjacent channel power ratio (ACPR) is better than −50 dBc after digital predistortion (DPD), exhibiting satisfactory linearity.

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面向 5G 大规模多输入多输出应用的混合集成低成本多芯片宽带 Doherty 功率放大器模块

本文针对 5G 大规模多输入多输出 (MIMO) 应用，提出了一种基于多芯片模块 (MCM) 的混合集成宽带 Doherty 功率放大器 (DPA)，其有源器件采用氮化镓 (GaN) 工艺制造，无源电路采用砷化镓 (GaAs) 集成无源器件 (IPD) 工艺制造。为了实现更好的带宽性能，提出了一种具有低 Q 值输出网络的反相 DPA 结构，并采用了单驱动器架构，以实现芯片的高增益和小面积。所提出的 DPA 带宽为 4.4-5.0 GHz，可达到 45.0 dBm 以上的饱和度。从 37 dBm 到饱和功率的增益压缩小于 4 dB，平均功率附加效率（PAE）为 36.3%，4.5-5.0 GHz 的峰均功率比（PAPR）为 8.5 dB。数字预失真（DPD）后，测得的邻道功率比（ACPR）优于-50 dBc，线性度令人满意。

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来源期刊

Engineering Environmental Science-Environmental Engineering

自引率

1.60%

发文量

335

审稿时长

35 days

期刊介绍： Engineering, an international open-access journal initiated by the Chinese Academy of Engineering (CAE) in 2015, serves as a distinguished platform for disseminating cutting-edge advancements in engineering R&D, sharing major research outputs, and highlighting key achievements worldwide. The journal's objectives encompass reporting progress in engineering science, fostering discussions on hot topics, addressing areas of interest, challenges, and prospects in engineering development, while considering human and environmental well-being and ethics in engineering. It aims to inspire breakthroughs and innovations with profound economic and social significance, propelling them to advanced international standards and transforming them into a new productive force. Ultimately, this endeavor seeks to bring about positive changes globally, benefit humanity, and shape a new future.