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本文提出一种宽带双向无校准的D波段（110-170GHz）移相器，采用频率/开关交错技术实现360°相位覆盖。该设计解决了传统D波段移相器在频率不变性、校准复杂度和双向工作方面的挑战，适用于大规模相控阵系统。
With the increasing need for high data-rate and channel throughput, the D-band (110 to 170GHz) has been actively explored for beyond-5G and 6G wireless communication, sensing, and radar applications [1,2]. To overcome the severe free-space path loss at D-band, large-scale phased arrays are essential to focus and steer the radiation beams [3-5]. As summarized in Fig. 33.4.1 (top), D-band phased arrays come with a list of system challenges, which affects the design requirements of the front-end building blocks, in particular the phase shifters (PSs). First, the array element should fit into a ~λ/2×λ/2 grid dictated by the antenna spacing (1mm×1mm at 150GHz). This requires compact PSs with a desired bidirectional ability to enable PS sharing between a transmitter and receiver of each element. Second, due to the narrow beamwidth of large-scale phased arrays, accurate beamforming is essential, requiring PSs with 360° phase range, accurate phase control
Basem Abdelaziz Abdelmagid, Yuqi Liu, Hua Wang
ETH Zürich, Zürich, Switzerland