在 6dB 功率衰减时输出功率为 22dBm 且功率附加效率为 21% 的 39 GHz 类多赫蒂功率放大器

IF 3.7 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Journal on Emerging and Selected Topics in Circuits and Systems Pub Date : 2024-01-08 DOI:10.1109/JETCAS.2024.3351075
Lang Chen;Lisheng Chen;Depeng Sun;Yichuang Sun;Yulin Pan;Xi Zhu
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引用次数: 0

摘要

本作品介绍了一种用于毫米波(mm-wave)应用的类 Doherty 功率放大器的设计。所设计的功率放大器采用了新颖的对称负载调制平衡放大器(S-LMBA)结构。这种设计的优势在于最大限度地减少了经典 LMBA 方法中经常遇到的不期望的阻抗相互作用。这种相互作用通常是由于在输出正交耦合器的隔离端口使用了非 50~\Omega $ 负载。此外,还精心设计了幅值和相位控制网络,以便为所设计的 S-LMBA 生成特定的幅值和相位信息。为了证明所提出的想法,S-LMBA 采用 45 纳米 CMOS SOI 技术制造。在 39 GHz 频率下,实现了 22.1 dBm 的饱和输出功率($\text{P}_{mathrm {sat}}$),最大功率附加效率(PAE)为 25.7%。此外,当所设计的 S-LMBA 在 6 dB 功率衰减条件下工作时,其漏极效率比理想的 Class-B 工作方式提高了 1.68 倍。当使用 200 MHz 单载波 64-quadrature-amplitude-modulation (QAM) 信号时,平均输出功率为 13.1 dBm,PAE 为 14.4%,误差矢量幅度(EVM $_{\mathrm {rms}}$ )高于 -22.5 dB,相邻信道功率比(ACPR)为 -23 dBc。包括所有测试垫在内,所设计的 S-LMBA 的占地面积仅为 1.56 平方毫米。
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A 39 GHz Doherty-Like Power Amplifier With 22dBm Output Power and 21% Power-Added Efficiency at 6dB Power Back-Off
The design of a Doherty-like power amplifier for millimetre-wave (mm-wave) applications is presented in this work. The designed power amplifier employs a novel symmetrical load-modulated balanced amplifier (S-LMBA) architecture. This design is advantageous in minimizing the undesired impedance interaction often encountered in the classic LMBA approach. Such interactions are typically due to the use of a non- $50~\Omega $ load at the isolation port of the output quadrature coupler. Moreover, magnitude and phase control networks are carefully designed to generate the specific magnitude and phase information for the designed S-LMBA. To demonstrate the proposed ideas, the S-LMBA is fabricated in a 45-nm CMOS SOI technology. At 39 GHz, a 22.1 dBm saturated output power ( $\text{P}_{\mathrm {sat}}$ ) with a maximum power-added efficiency (PAE) of 25.7% is achieved. In addition, 1.68 times drain efficiency enhancement is obtained over an ideal Class-B operation, when the designed S-LMBA is operated at 6 dB power back-off. An average output power of 13.1 dBm with a PAE of 14.4% at an error vector magnitude (EVM $_{\mathrm {rms}}$ ) above -22.5 dB and adjacent channel power ratio (ACPR) of -23 dBc is also achieved, when a 200 MHz single carrier 64-quadrature-amplitude-modulation (QAM) signal is used. Including all testing pads, the footprint of the designed S-LMBA is only 1.56 mm2.
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8.50
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2.20%
发文量
86
期刊介绍: The IEEE Journal on Emerging and Selected Topics in Circuits and Systems is published quarterly and solicits, with particular emphasis on emerging areas, special issues on topics that cover the entire scope of the IEEE Circuits and Systems (CAS) Society, namely the theory, analysis, design, tools, and implementation of circuits and systems, spanning their theoretical foundations, applications, and architectures for signal and information processing.
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