用于5G应用的28/37/39 GHz硅基多频段线性Doherty功率放大器
A 28/37/39GHz Multiband Linear Doherty Power Amplifier in Silicon for 5G Applications
摘要：
本文介绍了第一款用于宽带5G应用的硅多频带毫米波线性Doherty PA。提出了一种基于变压器的片上Doherty功率合成器，该功率合成器可以减小功率回退（PBO）时的阻抗变换比，从而提高带宽和功率合成效率。我们还设计了一个“驱动器PA协同设计”的方法，它创建了功率依赖的不均匀的Doherty PA馈电，并提高了Doherty操作没有任何硬件开销或带宽的妥协。为了验证概念，我们实现了一个28/37/39 GHz的PA完全集成在一个标准的130纳米SiGe BiCMOS工艺，占地1.8平方毫米。该放大器实现了52%的-3-dB小信号S21带宽和40%的-1-dB大信号饱和输出功率（Psat）带宽。在28/37/39 GHz频率下，PA实现了+16.8/+17.1/+17-dBm Psat、+15.2/+15.5/+15.4-dBm P1 dB，并在5.9/6/6.7-dB PBO下实现了比B类工作模式高1.72/1.92/1.62倍的效率提升。此外，PA在所有三个5G频段中均具有多Gb/s数据速率，并具有出色的效率和64 QAM线性度。该PA提升了毫米波段Doherty、宽带和5G硅PA的技术水平。它支持现有毫米波系统中当前PA的直接升级，并为未来多频段5G大规模多输入多输出和相控阵平台的紧凑型系统解决方案打开了大门。
英文摘要：
This paper presents the first multiband mm-wave linear Doherty PA in silicon for broadband 5G applications. We introduce a new transformer-based on-chip Doherty power combiner, which can reduce the impedance transformation ratio in power back-off (PBO) and thus improve the bandwidth and power-combining efficiency. We also devise a "driver-PA co-design" method, which creates power-dependent uneven feeding in the Doherty PA and enhances the Doherty operation without any hardware overhead or bandwidth compromise. For the proof of concept, we implement a 28/37/39-GHz PA fully integrated in a standard 130-nm SiGe BiCMOS process, which occupies 1.8mm2. The PA achieves a 52% -3-dB small-signal S21 bandwidth and a 40% -1-dB large-signal saturated output power (Psat) bandwidth. At 28/37/39GHz, the PA achieves +16.8/+17.1/+17-dBm Psat, +15.2/+15.5/+15.4-dBm P1dB, and superior 1.72/1.92/1.62 times efficiency enhancement over class-B operation at 5.9/6/6.7-dB PBO. Moreover, the PA demonstrates multi-Gb/s data rates with excellent efficiency and linearity for 64QAM in all the three 5G bands. This PA advances the state of the art for Doherty, wideband, and 5G silicon PAs in mm-wave bands. It supports drop-in upgrade for current PAs in existing mm-wave systems and opens doors to compact system solutions for future multiband 5G massive MIMO and phased-array platforms.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
