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本文提出了一种工作在436-472GHz的4元素中频波束成形相控阵接收机，采用65nm CMOS工艺。通过两步混频架构减少布局开销，并利用倍频链驱动太赫兹混频器，实现了36GHz系统带宽和27.5dB噪声系数。该设计解决了太赫兹频段相控阵接收机的高集成度与性能平衡问题。
Abstract This paper presents a 436-to-472GHz 4-element IF beamforming phased-array receiver in 65nm CMOS. A two-step mixing architecture reduces layout overhead. The LO frequency multiplier chain provides >-1dBm over 180 to 214GHz to drive the THz mixer. The 6-bit phase shifter covers 51 to 66GHz with 2.5° phase error. The on-chip stacked patch antenna array enables 10dBi gain and 91GHz 3dB gain-bandwidth. The receiver achieves ±35° scanning range, 36GHz system operating bandwidth and 27.5dB noise figure. The terahertz (THz) spectrum (300GHz to 3THz) offers tremendous potential for ultra-highspeed wireless communication and high-resolution sensing. CMOS phased arrays are key enablers for THz systems, providing beam steering and enhanced sensitivity [1-3]. However, implementing THz phased-array systems remains challenging. The RF phase-shifting architecture is demanding to realize at THz frequencies, since the design of active phase
Hao Guo, Hao-Tao Hu, Zhicheng Lin, Zijun Guo, Xiaoyue Xia, Kam Man Shum, Chi Hou Chan
City University of Hong Kong, Hong Kong, China