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该论文提出了一种基于耦合旋转行波振荡器（RTWO）的次谐波接收机前端，用于5G E波段（71-76GHz和81-86GHz）回传链路。解决了本地振荡器分配网络需要>19%调谐范围、精确正交相位以及低相位噪声（-119dBc/Hz @10MHz偏移）的难题，实现了低功耗高性能的毫米波接收。
A fully integrated receiver for high-capacity 5G E-Band Backhaul links (71 to 76GHz and 81 to 86GHz) needs a local-oscillator (LO) distribution network with >19% tuning range (TR) and accurate quadrature phases. Further, the LO phase noise (PN) at 10MHz offset should be as low as -119dBc/Hz to impair the SNR of the received 64-QAM signal by <1dB at 10-6 BER [1]. Silicon-based solutions reported so far either do not meet such stringent requirements [1-4] or demand large power consumption in the LO distribution network [5]. We propose a direct-conversion I/Q subharmonic-receiver (SHRX) architecture that leverages on-chip coupled rotary traveling-wave oscillators (RTWOs) to generate N=8 differential phases at fLO=2fRF/N, a quadrature-correction circuit to realize accurate I/Q phases, and current-mode passive mixers (MXs) to allow lowVDD operation and to greatly simplify the layout. The subharmonic architecture is
Marco Vigilante, Patrick Reynaert
KU Leuven, Heverlee, Belgium