A coupled-RTWO-based subharmonic receiver front-end for 5G E-Band backhaul links in 28nm bulk CMOS

摘要

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].