A 44 To 64 GHz Broadband 90° Hybrid Doherty PA With Quasi Non-Foster Tuner in 0.13 μm SiGe
A 44 To 64 GHz Broadband 90° Hybrid Doherty PA With Quasi Non-Foster Tuner in 0.13 μm SiGe
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具有 0.13 μm SiGe 中准非 Foster 调谐器的 44 至 64 GHz 宽带 90° 混合 Doherty PA
DOI：
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发表时间：
2021
影响因子：
3
通讯作者：
K. Sengupta
中科院分区：
文献类型：
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作者：
Zheng Liu;Yiming Yu;K. Sengupta
这封信提出了一个同时宽带和回退高效毫米波线性Doherty PA利用正交混合和Doherty带宽增强技术，利用准非福斯特阻抗合成在正交隔离端口。我们分析了非福斯特合成与片上阻抗调谐器，允许宽带回退效率的设计方法，而不会遭受非线性由于低泄漏功率的隔离端口。在44-64 GHz范围内，所提出的SiGe PA在峰值功率下实现了26%-34.7%的集电极效率，在6 dB回退下实现了14%-23.2%的集电极效率，Psat为18.5-21.5 dBm，峰值增益为18.5 dB。它支持6 Gbps 64 QAM信号，EVM/ACLR为−26.5 dB/−28.3 dBc，54 GHz时平均Pout/PAE为14.6 dBm/14.6%。据作者所知，这项工作实现了硅基毫米波功率放大器（PA）中最高的带宽，其中高于B类回退效率。
This letter presents a simultaneous broadband and back-off efficient mm-wave linear Doherty PA utilizing quadrature hybrid and a Doherty bandwidth enhancement technique exploiting quasi non-Foster impedance synthesis at the quadrature isolation port. We show analytically the design methodology of the non-Foster synthesis with ON-chip impedance tuner that allows broadband back-off efficiency, without suffering from nonlinearity due to the low-leakage power of the isolated port. Across 44–64 GHz, the proposed SiGe PA achieves collector efficiency of 26%–34.7% at peak power and 14%–23.2% at 6 dB back-off with 18.5–21.5 dBm Psat and peak gain of 18.5 dB. It supports 6 Gbps 64 QAM signal with −26.5 dB/−28.3 dBc EVM/ACLR at average Pout/PAE of 14.6 dBm/14.6% at 54 GHz. To the best of the authors’ knowledge, this work achieves highest bandwidth among silicon-based mm-wave power amplifiers (PAs) where higher than class-B back-off efficiency is achieved.