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本文提出了一种基于振荡模式分裂技术的四核四模VCO，覆盖13.7至41.5GHz频率范围，实现了214.1dBc/Hz的FoMT，解决了毫米波VCO在宽调谐范围与低相位噪声之间的权衡难题。
Voltage-controlled-oscillators (VCOs) with simultaneous low phase noise and wide frequency tuning range (FTR) spanning from tens GHz to millimeter-wave (mm-wave) bands are required for various standardized applications, such as 5G wireless communication, software-defined radios, and emerging high-speed wireline data links. However, due to the limited quality factor of on-chip passive components, increasing parasitics, and the tight capacitance budget, it is still very challenging for a single VCO to meet the wide FTR requirement while maintaining the phase-noise performance, especially in mm-wave bands. A recent development has proven that, when compared with enlarging switched-capacitor arrays or using switched inductors/transformers, multimode multicore techniques [1-5] are more efficient. This is because no RF current ideally flows through the lossy mode switches (assuming symmetrical cores), thereby
Huanyu Ge, Haikun Jia, Wei Deng, Ruichang Ma, Zhihua Wang, Baoyong Chi
Tsinghua University, Beijing, China