A 9mW 54.9-to-63.5GHz Current-Reuse LO Generator with a 186.7dBc/Hz FoM by Unifying a 20GHz

📋 论文概要

该论文提出了一种低功耗毫米波LO发生器，通过统一20GHz三次谐波丰富的电流输出VCO、谐波电流滤波器和60GHz TIA，实现了电流复用架构。解决了FMCW雷达中低功耗与严格相位噪声要求的矛盾，在9mW功耗下达到54.9-63.5GHz频率范围和186.7dBc/Hz的FoM。

💡 主要创新点

• 提出电流复用架构，将20GHz VCO、谐波电流滤波器和60GHz TIA统一设计，降低功耗。
• 采用三次谐波丰富的电流输出VCO，结合谐波电流滤波器，有效提取并放大三次谐波，实现毫米波信号生成。
• 通过优化VCO和TIA的电流共享，在低功耗下实现宽调谐范围和优异的相位噪声性能。

🏷 关键词

📄 原文摘要

Chao Fan , Jun Yin , Chee-Cheow Lim , Pui-In Mak , Rui P. Martins 1 1 1 1 1,2 University of Macau, Macau, China University of Lisboa, Lisbon, Portugal 1 2 Low-power mm-wave sensors using an FMCW radar technology are opening up unprecedented opportunities in high-resolution object detection (e.g., gesture and breathing). Building a low-power mm-wave LO generator (LOG) fulfilling the stringent phase-noise (PN) requirement of the FMCW transceiver is still challenging [1]. A number of indirect mm-wave LOGs have been explored. As depicted in Fig. 17.9.1, a 20GHz VCO followed by a frequency tripler (%3) effectively lowers the PLL operating frequency by 3 times, benefiting not only the power budget but also the frequency-tuning range. Injection locking [2], harmonic-mixing [3], and voltage-mode implicit frequency tripling [4] are the mainstream %3 techniques, where the first technique faces the trade-off between

👥 作者与机构

3rd-Harmonic-Rich Current-Output VCO, a Harmonic-Current Filter and a 60GHz TIA