A compact, 60-GHz high-power, wideband balanced power amplifier, implemented in a 90-nm SiGe BiCMOS technology, is demonstrated. A three-conductor transmission-line-based asymmetric coupled-line directional coupler is used to achieve impedance transformation and quadrature power combining simultaneously. A Wilkinson balun based on a three-conductor transmission line structure is implemented to achieve a four-way series–parallel power combining. Analyses of the three-conductor asymmetric coupler and the Wilkinson balun combiner are provided in this article. The design achieved 17.3-dB small-signal gain, with 41.8-GHz 3-dB bandwidth, from 28.1 to 69.9 GHz. A 24.4-dBm saturated output power ( $P_{\mathrm{ SAT}}$ ) was measured at 60 GHz with a 22-GHz 1-dB $P_{\mathrm{ SAT}}$ bandwidth, covering 45–67 GHz. The circuit showed a peak power-added efficiency (PAE) of 14.2% at 60 GHz, and the peak PAE is above 11.5% across the 1-dB $P_{\mathrm{ SAT}}$ bandwidth. The proposed eight-way power combining scheme achieves 0.077-mm² per-way area consumption and 449-mW/mm² power density.

中文翻译：

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具有基于三导体传输线的威尔金森巴伦和非对称定向耦合器的 60GHz SiGe 功率放大器

展示了采用 90 纳米 SiGe BiCMOS 技术实现的紧凑型 60 GHz 高功率宽带平衡功率放大器。采用基于三芯传输线的非对称耦合线定向耦合器同时实现阻抗变换和正交功率合成。实现了基于三导体传输线结构的威尔金森巴伦，以实现四路串并联功率组合。本文提供了对三导体非对称耦合器和威尔金森巴伦组合器的分析。该设计实现了 17.3-dB 的小信号增益，41.8-GHz 的 3-dB 带宽，从 28.1 到 69.9 GHz。24.4dBm 饱和输出功率 ( $P_{\mathrm{ SAT}}$ ) 是在 60 GHz 下用 22-GHz 1-dB 测量的 $P_{\mathrm{ SAT}}$ 带宽，覆盖 45–67 GHz。该电路在 60 GHz 下的峰值功率附加效率 (PAE) 为 14.2%，并且峰值 PAE 在 1-dB 范围内高于 11.5% $P_{\mathrm{ SAT}}$ 带宽。提出的八路功率组合方案实现了 0.077-mm ²单路面积消耗和 449-mW/mm ²功率密度。