A Resonator-optimized 15mW 18-50GHz Quad-core-six-mode VCO with 204dBc/Hz FoMT and 0.058mm2 Compact Area in 40nm CMOS. - Changqi Zhou; Haobin He; Hao He; Jianbo Huang; Shiguang Zhong; Zhijian Chen (ISCAS, 2025)