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本文提出了一种77GHz 8位嵌套向量和相移器，采用28nm CMOS工艺。通过将单个外向量分裂为两个内向量，并结合峰值误差平滑技术，有效抑制了I/Q失配，实现了0.33°的均方根相位误差和0.065dB的均方根增益误差，核心面积仅0.17mm²，适用于MIMO雷达系统。
Abstract In this paper, we present a 77GHz 8-bit nested vector-sum phase shifter in 28nm CMOS. The architecture performs vector modulation by splitting a single outer vector into two inner vectors generated by a two-stage I/Q coupler. Owing to its insensitivity to I/Q mismatch and the peak error smoothing technique, the phase shifter achieves 0.33° and 0.065dB rms phase and gain errors while occupying a core area of 0.17mm2. With the recent advancements in advanced driver-assistance systems (ADAS), millimeterwave (mm-wave) phased-array RFICs have attracted attention as key technologies for radar systems in autonomous driving [1] and are expected to expand into various fields such as robotics and mobile applications. In multiple-input-multiple-output (MIMO) radar systems, phased-array architecture is required to increase the detection range and achieve high angular resolution. A vector-sum phase shifter (VSPS) achieves 360° phase-shifting range
Geonho Park, Byeong-Taek Moon, Kyunghwan Kim, Doyoon Kim, Goeun Baek, Byungho Yook, Hyun-Chul Park, Chan-Hong Park
Samsung Electronics, Hwaseong, Korea