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提出一种17.9-22.4GHz四核Class-F-1 VCO，采用环形五线变压器谐振腔实现高Q值，无需额外共模谐振器；通过多路径同步和分段对齐技术改善同步和PVT鲁棒性，实现了195.6±1.3dBc/Hz FoM和-145.6至-141dBc/Hz相位噪声。
Abstract A 17.9-to-22.4GHz quad-core inverse-Class-F VCO achieving PN of −145.6 to −141dBc/Hz and an FoM of 194.3 to 196.9dBc/Hz is reported. The VCO features a circular pentafilar transformer tank that provides high Q1/Q2 without requiring extra CM resonators. Multi- path synchronizations—in-phase at gates, out-of-phase at drains, and an auxiliary dualpath coil—equalize impedances at both f0 and 2f0. A segmented alignment technique is proposed to preserve 1D tuning with improved robustness against PVT variations. Harmonic-shaping (HS) and multi-core (MC) techniques represent two critical approaches to lower PN of mm-wave VCOs [1]. In MC-VCOs, sufficient synchronization paths must be introduced to reduce the PN penalty caused by the mismatch of the cores [2,3]. In HSVCOs, optimal performance requires both precise harmonic-resonance alignment and sufficiently high harmonic impedance to enhance the harmonic components. The Class-F23
Yue Wu1, Yatao Peng1,2, Jiawei Li1, Fengen Yuan1, Jinge Li1, Jun Yin1, Rui P. Martins1, Pui-In Mak1
University of Macau, Macau, China, 2UM Hetao IC Research Institute, Shenzhen, China