A 240Gb/s 0.51pJ/b D-Band Direct-Conversion Receiver with Injection-Locking Based Quadrature Correction in 28nm CMOS

Exploiting the D-band spectrum is critical for next-generation wireless communication systems. This work presents a direct-conversion D-band receiver featuring a mixer-first topology that maximizes bandwidth and linearity for ultra-fast data rates. A novel injection-locking based quadrature correction scheme is proposed for precise IQ phase imbalance calibration. A high-order harmonic injection-locking LO multiplier chain is adopted to minimize DC power consumption. Measurement results show that the receiver exhibits a low noise figure around 13.3dB. Achieving 240Gb/s under 16QAM modulation with an energy efficiency of 0.51pJ/b, this work demonstrates the highest data rate and energy efficiency among all reported state-of-the-art D-band receivers.