Design and characterization of a 1.7–2.7 GHz quasi-MMIC Doherty power amplifier
Design and characterization of a 1.7–2.7 GHz quasi-MMIC Doherty power amplifier
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1.7–2.7 GHz 准 MMIC Doherty 功率放大器的设计和表征
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
S. Cripps
中科院分区：
文献类型：
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作者：
R. Quaglia;Mark D. Greene;M. Poulton;S. Cripps
本文介绍了适用于 1.7–2.7 GHz 频段小型蜂窝应用的 Doherty 功率放大器的设计和特性分析。选择准单片实现是因为与全单片解决方案相比具有成本优势，并且依赖于 GaN HEMT 有源器件，但无源网络在 GaAs 衬底上实现。集总元件 Doherty 组合器旨在最大限度地提高带宽，使功率放大器表现出高回退效率，在 1.7–2.7 GHz 频段内达到高于 37% 的效率。双输入拓扑允许在性能优化方面具有高度灵活性，特别是在带宽方面。所制造的 Doherty 与之前发布的功率放大器相比具有优势。
This paper presents the design and characterization of a Doherty power amplifier for small cells applications in the 1.7–2.7 GHz band. A quasi-monolithic realization is chosen for its cost advantages when compared to a fully-monolithic solution, and relies on GaN HEMT active devices, but passive networks realized on GaAs substrate. A lumped element Doherty combiner is designed to maximize the bandwidth at which the power amplifier shows high back-off efficiency that results higher than 37% in the 1.7–2.7 GHz band. The dual-input topology permits high flexibility in the optimization of performance, in particular in terms of bandwidth. The fabricated Doherty favourably compares to previously published power amplifiers.